OS/2 Shareware BBS: 10 Tools/10-Tools.zip/pmbitech.zip/PMBDTECH.INF

OS/2 Help File | 1994-08-17 | 254KB | 10,602 lines

ΓòÉΓòÉΓòÉ 1. General Information ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 1.1. About this book ΓòÉΓòÉΓòÉ

The OS/2 Bidirectional Support, Developer's guide and reference is directed to
application designers and programmers. It provides information about the
Presentation Manager (PM) support and application programming interfaces (APIs)
for the Arabic and Hebrew languages thus allowing programmers to create Arabic
or Hebrew applications for this environment.

The Bidirectional support in PM is provided in the Arabic and Hebrew language
versions of OS/2 2.x. The support is active/configured when the COUNTRY
selection during OS/2 installation is Arabic or Hebrew in these versions.


ΓòÉΓòÉΓòÉ 1.2. Introduction ΓòÉΓòÉΓòÉ

The purpose of this guide is to provide the necessary information to allow the
creation of applications that work in Arabic or Hebrew. Reading and writing of
Arabic or Hebrew text is done from Right-To-Left.  This means that the "start"
point of a Hebrew/Arabic text is on the right side of the page/screen while the
natural end of the text is on the left side.

In many cases, Arabic and Hebrew scripts contain embedded pieces of text which
are written and read from Left-To-Right.  In fact, having mixed Right-To-Left
(RtL) and Left-To-Right (LtR) "segments" of text is very common in these
languages.  Examples of such cases is the use of numbers (which are usually
LtR, as in English) and the use of embedded Latin text within Arabic/Hebrew
text, which is also very common.

Having such text, with embedded Right-To-Left and Left-To-Right pieces
(segments), is the reason for referring to the Arabic and Hebrew languages as
"Bidirectional Languages" (or bidi languages, for short).

In this document, we will use the term 'National Language' or 'Bidi Language'
to refer to 'Arabic or Hebrew'. (to distinguish it from English). Also,
'Arabic/Hebrew' is used to signify 'either Arabic or Hebrew'.


ΓòÉΓòÉΓòÉ 1.2.1. Bidirectional Applications ΓòÉΓòÉΓòÉ

Bidirectional applications are applications that support the Arabic and Hebrew
languages. By nature, bidirectional applications have to be sensitive, to some
extent, to the fact that their text data is bidirectional (contains embedded
LtR and RtL segments).

In this context there are two types of applications:

   o  Bidi-Aware Applications

      These applications are written specifically to be used by Arabic and
      Hebrew-speaking users.  These applications are aware of the fact that the
      text being processed is bidirectional, and take steps to ensure the
      correct processing of this text. Bidi-aware applications make active use
      of the PM bidirectional support APIs.

   o  Bidi-Unaware Applications

      Bidi-Unaware applications do not have any knowledge about the fact that
      the text they handle/process is bidirectional. Usually, these
      applications are developed for users of a Left-To-Right language (such as
      English or French), and thus they do not perform any special handling of
      bidirectional text. Such applications do not make explicit calls to the
      PM APIs for bidirectional support.


ΓòÉΓòÉΓòÉ 1.2.2. Scope of PM Bidirectional support ΓòÉΓòÉΓòÉ

The PM bidirectional support has been designed with the following main design
objectives:

   o  Allow creation of bidi-aware applications.

   o  Allow as easy as possible conversion of bidi-unaware applications to
      being bidi-aware.

   o  Allow usage of bidi-unaware applications in the National Language. The
      extent to which this is possible is largely dependent on the application
      itself.

 Thus, the full bidirectional support is provided to applications which make
 active use of the PM Bidirectional services (APIs, PM messages etc). In
 addition, a certain degree of support is also provided for bidi-unaware
 applications. Depending on the application, this support (for bidi-unaware)
 may provide various degrees of usability for the application when working with
 Arabic or Hebrew.

 The Bidirectional support in PM is provided in the Arabic and Hebrew language
 versions of OS/2 2.x. The support is active/configured when the COUNTRY
 selection during OS/2 installation is Arabic or Hebrew in these versions.


ΓòÉΓòÉΓòÉ 1.2.3. Making a bidi-unaware application bidi-aware ΓòÉΓòÉΓòÉ

Most of the applications that are developed today throughout the world are
created as Bidi-unaware applications (with the exception of applications
developed in the countries where the native language is Arabic or Hebrew). Such
applications can be made bidi-aware by adding calls to the PM bidi support APIs
and by adding code that is aware of bidirectional text and knows how to manage
it.

The PM bidirectional support provides the following types of
services/mechanisms to assist the conversion process of an application to be
bidi-aware.

   o  Bidirectional text presentation

      Support for bidirectional text presentation is available. This support is
      sensitive to the contents of the BIDIATTR environment variable.  When
      this variable is set, the text output functions do some extra processing
      to the text being output. This support provides very basic bidirectional
      support for the benefit of bidi-unaware applications.  For applications
      that use text in a very simple way (i.e they do not have any
      sophisticated text handling features), enabling this support (by
      initializing the BIDIATTR environment variable) may be enough.  For this
      basic support, the application code does not need be changed at all.  The
      fact that the unaware application runs in a bidi-supporting environment
      (denoted by the BIDIATTR variable) is enough to trigger the
      system-provided bidirectional text handling and thus gain some level of
      automatic support for such applications.

      In most cases, however, some additional support will be needed. In these
      cases, some changes must be made to the application in order to allow it
      to support bidi text.

   o  Bidirectional Input support

      This support allows typing of characters in both English and
      Hebrew/Arabic, as well as support for language-specific hotkeys. This is
      the basic means that allows the user to input national language text from
      the keyboard.

   o  Bidirectional PM Controls.

      PM applications make extensive use of system services called PM Controls.
      These services provide support for many routine tasks such as text entry,
      menu management, selections from a list of options and scrolling.

      With the PM Bidirectional support, all PM controls are bidi-aware
      services.  Applications can make use of these bidi-aware services by
      marking them as bidi-aware and specifying their bidirectional attributes.
      This way, an application can be made aware (up to a certain extent) just
      by marking its PM resources as Bidi resources.  In many cases, this
      process involves only changes in resource files (.RC) rather than
      changing source (and executional) code.

   o  Bidirectional support APIs.

      The third level of support is available only for applications that
      incorporate in their code explicit calls to the various PM Bidirectional
      APIs, such as calls for text conversions, keyboard input support,
      justification etc.


ΓòÉΓòÉΓòÉ 1.2.4. Supported Codepages ΓòÉΓòÉΓòÉ

The PM bidirectional support is dependent on the active codepage being used by
the application.  In most cases, the system determines what actions are taken
and what type of processing is done based on the active codepage.

In this version of PM, the codepages that are supported for bidirectional
processing are:

   o  Codepage 862 - Hebrew PC.

   o  Codepage 864 - Arabic PC.


ΓòÉΓòÉΓòÉ 1.2.5. Arabic and Hebrew Fonts ΓòÉΓòÉΓòÉ

The Arabic and the Hebrew codepages are bilingual (i.e. they contain English
and Arabic or English and Hebrew characters). When either of these codepages is
active, the system fonts support all the characters in the relevant codepage.
This means that the system fonts are bilingual, for example "Courier" would
contain both English and Arabic/Hebrew. shapes.

This means that applications do not need to change fonts when switching between
Arabic/Hebrew and English characters.

Note:   Arabic and Hebrew postscript (Adobe Type 1) fonts are created using
font specific encoding. This means that the value used for the codepage of
these fonts is "65400" rather than the national codepage. Applications that
specify the usCodepage field when creating a logical font should use this value
in order to get a match for the Bidi postscript fonts.


ΓòÉΓòÉΓòÉ 2. Bidirectional Text and Bidirectional Attributes ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 2.1. About Bidirectional Text ΓòÉΓòÉΓòÉ

To correctly process bidirectional text, applications must assume that text is
stored in computer memory in a "different way" from when presented on an output
device.  In other words, a text-conversion process of some sort takes place
when bidirectional text is retrieved from storage (files, memory) to be
displayed on the screen (or printer), or when it is read from the keyboard and
stored.

There are many ways to represent (store in memory, or files) bidirectional text
that contains Arabic or Hebrew characters, English characters and numbers
(digits). Different applications use different methods to store their text data
and use different conversions before displaying their text.

Applications may choose to use different formats to represent bidirectional
text, depending on the nature of the processing that they perform on this text.

In order to support bidirectional text processing, the PM support for Hebrew
and Arabic defines a set of parameters that describe the different "features"
that any Arabic or Hebrew bidirectional text may have. These parameters are
called "Bidirectional Attributes".

A bidirectional application can describe the nature of the bidirectional text
data it processes, by identifying a set of bidirectional attributes. These
bidirectional attributes, which are implemented in PM in a hierarchical model,
uniquely define the bidirectional text and the conversions it must go through,
to the PM system and to the PM bidirectional services.

Below is the list of the bidirectional attributes as well as a short
explanation of each one of them.


ΓòÉΓòÉΓòÉ 2.2. Bidirectional Attributes ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 2.2.1. Text Type ΓòÉΓòÉΓòÉ

The 'Text Type' bidi attribute defines the method by which text segments (that
have a certain direction) are detected and processed.  The text type attribute
can have the following values:

   o  Visual text

      The 'Visual' data type means, that for a certain piece of text there are
      no sub-segments.  In other words, the whole text has the same direction
      (whether it is LtR or RtL is determined by the Text Orientation
      attribute, see below). Whether the text contains digits, English, or
      Arabic/Hebrew characters does not change the sequence of the characters
      within this given piece of text.

      For example (LTR orientation; upper case letters represent English
      letters, while lowercase letters represent Arabic or Hebrew letters):

              Index of character: 012345678901
              Storage buffer    : LATIN cibara
              Displayed String  : LATIN cibara

            or, in the case of RtL orientation:

              Index of character: 012345
              Storage buffer    : arabic
              Displayed String  : cibara

   o  Logical text with implicit detection and processing.

      This value is sometimes called "implicit" (for short) or "typing order"
      as it usually represents the order of characters as they are typed on the
      keyboard.

      Here, the determination of the sub-segments is largely based on the
      actual characters in the text.  When there is a doubt (as in the case of
      characters which do not have a "strong" language meaning associated with
      them, such as SPACE, QUESTION MARK and digits), the determination of the
      sub-segments and the conversion required is done by a "smart" algorithm.

      Example (LTR orientation; upper case letters represent Latin letters,
      while lowercase letters represents Arabic or Hebrew letters).

              Index of character: 012345678901
              Storage buffer    : LATIN hebrew
              Displayed String  : LATIN werbeh


ΓòÉΓòÉΓòÉ 2.2.2. Text Orientation ΓòÉΓòÉΓòÉ

This attribute defines the orientation of a text string (object). It may have
the following values:

   o  Left-To-Right

   o  Right-To-Left

   o  Contextual

 For text that has the Visual data type, the text orientation determines the
 order of the characters.  For example, when visual text has Left-To-Right
 orientation, the order of the characters in the memory buffer and the
 presentation order (from left-to-right) is the same.

 For text that has the Logical/Implicit data type, the text orientation of a
 certain piece of text defines which type of characters are considered the
 "base" text. The characters which belong to the "base" text retain their
 sequence when converting from storage to presentation or vice versa, while the
 characters which belong to embedded segments ("non base" text) are reversed.

 For LtR text, Latin text retains its order while Arabic/Hebrew text is
 reordered (reversed).

 For RtL text, Arabic/Hebrew text retains its order while Latin text is
 reordered (reversed).

 Contextual text orientation is not exactly an orientation value (obviously,
 orientation can be only LtR or RtL).  The contextual text orientation value
 tells the system that the actual orientation of the given text should be
 determined based on the first "strong" character in the text (in storage
 buffer indexes).  I.e, if the first character in the buffer is an English
 character, the orientation of the text will be Left-To-Right.  If the first
 character in the buffer is Arabic/Hebrew

   - the text orientation is Right-To-Left.
 (If the first character in the buffer is a "neutral" character, such as a
 SPACE, the orientation is determined by the next character in buffer, and so
 on).


ΓòÉΓòÉΓòÉ 2.2.3. Window Orientation ΓòÉΓòÉΓòÉ

The "Window Orientation" bidi attribute is unique among all other bidi
attributes, as it defines a property of a WINDOW (rather than a property of the
text being processed). The window orientation attribute is "packaged" in the
bidi attribute word for convenience, since it is a very handy placeholder for
bidi-oriented information.

The Window Orientation attribute covers several visual aspects of a window.
These include:

   o  Layout

      In the Window Orientation context, layout refers to the positioning of
      objects within a window or dialog.

      A window with a LtR window orientation has its origin at the bottom left.

      A window with a RtL window orientation has its origin at the bottom right
      of the window instead of the bottom left, thus placement of objects (e.g.
      child windows, controls, vertical scrollbar, etc.) within the window will
      be in the symmetrically opposite position to those in a LtR window.

      Some examples of how this works:

        -  RtL Buttons have their text positioned to the left of the 'button
           bitmap'.

        -  RtL Horizontal scrollbars have their origin on the right.

        -  Vertical scrollbars in listboxes, MLEs, etc. are placed on the left
           side of the window.

        -  This concept is applied in the same way to other objects in the
           system.

   o  Justification

      In many cases the default justification of objects within a Right-To-Left
      object is on the right.

 In general, a window with RtL window orientation has Right-To-Left layout and
 its objects are right-justified.


ΓòÉΓòÉΓòÉ 2.2.4. Symmetric swapping ΓòÉΓòÉΓòÉ

Directional characters are characters such as parentheses, brackets, braces,
etc. In LtR text, an "open" bracket is a left bracket, while for RtL text an
"open" bracket is a right bracket.

Sometimes (especially in the process of transforming a bidi-unaware application
to be bidi-aware), it is useful to have the system automatically "swap" between
the symmetric characters.  This way, the processing part of an application may
be left unchanged, while the presentation part is taken care of by this
automatic swap. Note that this automatic swap is relevant only for RtL text (or
RtL text segments within LtR text).

For Example (Visual, RtL text).

   Storage  buffer  : (1) hebrew
   Display          : werbeh )1(       without symmetric swapping
   Display          : werbeh (1)       with symmetric swapping


ΓòÉΓòÉΓòÉ 2.2.5. Character shape determination ΓòÉΓòÉΓòÉ

Arabic is a cursive script.  This means that the presentation of each letter
depends on its location in the word (initial, middle, final or isolated).

Data may be stored "shaped", i.e. each letter of the text is stored in the
specific codepoint (out of the different possible codepoints for that letter)
that suits its position in the word and the connecting capabilities of its
adjacent letters. Such data can be displayed directly.

Data may also be stored in nominal or base shapes, i.e. one codepoint per
letter, regardless of its position.  Such data must be "shaped" before it is
displayed.

The text shape attribute defines how the Arabic text is stored and also what
type of conversion should be performed on it in order to display it correctly.
It can take the following values :

   o  TEXT_DISPLAY_SHAPED

      This implies that the text is stored in nominal/base shapes and should be
      automatically shaped upon display.

      PM entryfields that have this attribute automatically shape new text as
      it is being entered by the user and will submit the text in nominal
      shapes upon query.

   o  TEXT_SHAPE_NOMINAL

      This implies that the text is displayed and stored in its nominal (base)
      shapes.

      This text shape is not commonly used.

      The following shaping modes are valid only when the type of text is
      visual :

        -  TEXT_SAVE_SHAPED

           This implies that text is already shaped and ready for display.

           PM entryfields that have this attribute automatically shape new text
           as it is being entered by the user and will submit the text as it
           appears on the screen upon query.

        -  TEXT_SHAPE_INITIAL

           This implies that text is already shaped and ready for display.

           PM entryfields that are set to this mode shape new characters typed
           by the user in initial shapes and will submit the text as it appears
           on the screen upon query.

           This mode is usually initiated with a hotkey by users who need to
           type some characters specifically in their initial shapes.

        -  TEXT_SHAPE_MIDDLE

           This implies that text is already shaped and ready for display.

           PM entryfields that are set to this mode shape new characters typed
           by the user in middle shapes and will submit the text as it appears
           on the screen upon query.

           This mode is usually initiated with a hotkey by users who need to
           type some characters specifically in their middle shapes.

        -  TEXT_SHAPE_FINAL

           This implies that text is already shaped and ready for display.

           PM entryfields that are set to this mode shape new characters typed
           by the user in final shapes and will submit the text as it appears
           on the screen upon query.

           This mode is usually initiated with a hotkey by users who need to
           type some characters specifically in their final shapes.

        -  TEXT_SHAPE_ISOLATED

           This implies that text is already shaped and ready for display.

           PM entryfields that are set to this mode shape new characters typed
           by the user in isolated shapes and will submit the text as it
           appears on the screen upon query.

           This mode is usually initiated with a hotkey by users who need to
           type some characters specifically in their isolated shapes.


ΓòÉΓòÉΓòÉ 2.2.6. Numerals ΓòÉΓòÉΓòÉ

The numerals attribute detemines how numerals are processed upon display as
follows :

   o  NUMERALS_NOMINAL   - Display only nominal (i.e. Arabic) numerals.

   o  NUMERALS_NATIONAL  - Display only national (i.e. Hindi) numerals.

   o  NUMERALS_CONTEXT   - Display numerals according to surrounding text.

   o  NUMERALS_PASSTHRU  - Display numerals as stored.


ΓòÉΓòÉΓòÉ 2.3. Conversions of Bidirectional Text Data ΓòÉΓòÉΓòÉ

Bidirectional applications use bidirectional text.  The bidirectional text is
described by bidirectional attributes.  Since applications use different sets
of bidirectional attributes (and thus, different representations of
bidirectional text), it is necessary to convert this text among representation
forms.  The most common case is when an application converts the text from the
internal (storage) representation to the external (presentation) form.

OS/2 provides a set of APIs to manage the conversion of bidirectional text
between different formats. The text is assumed to be in a form/layout that is
described by a set of input values and is converted to another form described
by a set of output values.

In order to perform a text conversion, the caller must first call
LayoutCreateObject to create a layout object. The layout object is
automatically associated with a set of default values, known as layout values,
that depend on the locale used to create it.

Currently, the following locales are supported:

   o  Locale_Arabic

   o  Locale_Hebrew

 Using the handle to the layout object created, the caller can query the
 current values using LayoutQueryValues and set them, using LayoutSetValues, to
 the values required for the text transformation.

 The actual text transformation is done by the LayoutTransformText API, which
 converts its input buffer according to the values associated with the layout
 object. LayoutTransformText can also optionally provide some additional
 information about the transformation performed, such as mappings of the input
 buffer to the output buffer.

 LayoutEditShape is a more specialized text conversion API that allows an
 application to do Arabic character shape editing in and around a specific
 location in a buffer.

 When an application has finished its text conversions, it should release the
 resources used by the layout object using LayoutDestroyObject.

 See more on Layout Values and Programming in the reference section.


ΓòÉΓòÉΓòÉ 3. Presentation Manager Support for Bidirectional Attributes ΓòÉΓòÉΓòÉ

Presentation Manager provides support for bidirectional text by providing
applications with APIs to enable them to manage bidirectional attributes at
several levels.

   o  Process Bidirectional Attributes

   o  Window Bidirectional Attributes

   o  Presentation Bidirectional Attributes

   o  Clipboard Bidirectional Attributes


ΓòÉΓòÉΓòÉ 3.1. Process Bidirectional Attributes ΓòÉΓòÉΓòÉ

Process bidirectional attributes are used to assign applications a default set
of attributes.  These attributes are used by various PM components to determine
the processing that must take place.

In this version, the Process bidirectional attributes are determined based on
value of the "BIDIATTR" OS/2 environment variable which is in effect at the
time the program is loaded into memory. The BIDIATTR environment variable can
have multiple values that represent bidirectional attributes. For example:

SET BIDIATTR=TEXT_ORIENT_RTL,TEXTTYPE_VISUAL,TEXT_SAVE_SHAPED

The names of the various bidirectional attributes are documented in Appendix D.

Applications can set the process bidirectional attributes by using the
WinSetLangInfo API, with the parameter LI_BD_PROCESS_ATTR.


ΓòÉΓòÉΓòÉ 3.2. Window Bidirectional Attributes ΓòÉΓòÉΓòÉ

Window Bidirectional Attributes are assigned to each window in the Presentation
Manager system.  Window bidirectional attributes are usually inherited by a
window, at creation time, from its parent window. This is true for all windows,
except for windows that are children of the desktop window.  These windows
inherit their window bidirectional attributes from the process bidi attributes.

Applications use the WinSetLangInfo API with the LI_BD_WND_ATTR parameter to
set specific window bidi attributes.  Note that with the LI_BD_WND_ATTR
applications have control on the way bidirectional attributes are inherited
within the parent-child chain.

PM controls (which are part of the PM system) are sensitive to their
bidirectional attributes.  They determine their window layout based on the
'window orientation' attribute and perform text conversions based on other
bidirectional attributes.


ΓòÉΓòÉΓòÉ 3.3. Presentation Bidirectional Attributes ΓòÉΓòÉΓòÉ

These bidirectional attributes are associated with text output operations.  The
text output APIs in PM (WinDrawText and the various GpiCharString APIs) are
sensitive to the presentation bidirectional attributes.  These attributes are
inherited from the process bidirectional attributes at creation time of each
GPI presentation space.

The text-output APIs use the presentation bidi attributes to determine the
conversions that must be applied to the text as part of the processing of the
text-output APIs.  For example, GpiCharString will convert bidirectional text,
by calling the LayoutTransformText API on behalf of the application program.
The bidi-converted string will then be rendered on the the output device
(rather than the original string that has been provided in GpiCharString API
call).

Applications can optionally modify the presentation bidi attributes dynamically
by using the GpiSetBidiAttr API. Thus, applications have control on the text
conversion that are executed on a call by call basis.


ΓòÉΓòÉΓòÉ 3.4. Clipboard Bidirectional Attributes ΓòÉΓòÉΓòÉ

The clipboard maintains two sets of bidirectional attributes.

The first set is called the 'Clipboard Bidirectional Attributes' and is
associated with the text data that is currently stored in the clipboard. The
default value for this set is inherited from the process bidirectional
attributes of the application that issues WinSetClipbrdData. The source
application can optionally modify this set of attributes by using the
WinSetLangInfo API with the LI_BD_CLIP_ATTR effect.

The second set is called the 'Conversion Bidirectional Attributes'. This set is
associated with the target application, and its default value is inherited from
the process bidirectional attributes of the application that issues the
WinQueryClipbrdData API. The target application can optionally modify these
attributes by using the WinSetLangInfo API with LI_BD_CLIP_CONV_ATTR effect.

Refer to the Bidirectional Text Exchange Among Applications - Clipboard section
for more details.


ΓòÉΓòÉΓòÉ 3.5. Managing Bidirectional Attributes using the WinSetLangInfo API ΓòÉΓòÉΓòÉ

The WinSetLangInfo and the WinQueryLangInfo APIs are used by applications to
manage the various bidirectional attributes. The ulEffect parameter of these
APIs determines what kind of bidirectional attribute is being set/queried by
the call. The following values for ulEffect are supported:

   o  LI_BD_PROCESS_ATTR - Process bidirectional attributes.

   o  LI_BD_WND_ATTR   - Window bidirectional attributes.

   o  LI_BD_CLIP_ATTR   - Bidirectional attributes of the text contained in the
      clipboard.

   o  LI_BD_CLIP_CONV_ATTR - Bidirectional attributes to be used to convert the
      clipboard text data before being given to the application.

   o  LI_BD_WND_STAT   - Window bidirectional status (see below).

 For the LI_BD_WND_ATTR and LI_BD_WND_STAT effects, the caller of the API can
 choose if the setting of the bidi attributes (or status) should be done for
 the specified window itself, or for the specified window and all his
 child-windows.  This is possible by specifying the LIF_CHILD_INHERIT flag bit
 in the flFlags parameter of the WinSetLangInfo API.

 The caller can also instruct the window whose bidi attributes (or bidi status)
 are being set, to redraw itself, by specifying the LIF_WND_REFRESH flag.


ΓòÉΓòÉΓòÉ 3.5.1. Using the WinSetLangInfo API to send WM_SETBIDIATTR messages ΓòÉΓòÉΓòÉ

As part of the WinSetLangInfo API, an optional message can be sent to the
window procedure whose bidi attributes (or bidi status) is being set. This
provides a bidi-aware window procedure with a way to know that an application
is modifying its bidi state (attribute and/or status).  This allows the window
procedure to provide the required processing for this case. For example, when a
bidi-aware window receives the WM_SETBIDIATTR message, it can inspect which
bidi attributes are being set, and do necessary conversion on its internal
buffers to accommodate this change.  Another option it can take is to refuse
the request and protect its bidi attributes from modifications done by external
applications.

A window procedure can also ignore the WM_SETBIDIATTR by passing it to the
default window procedure which will result in the bidi attributes being set in
the internal window structure.

Similarly, the WinQueryLangInfo can send a message to the window procedure
whose bidi attributes or status are being queried. This gives the bidi-aware
window a chance to specify the value of the bidi attributes or status that is
returned to the querying application.

A window procedure can also ignore the WM_QUERYBIDIATTR by passing it to the
default window procedure which returns the window bidi attributes as stored in
the internal window structure.

When the WinSetLangInfo API is used by a window procedure to set its own
bidirectional attributes as part of WM_SETBIDIATTR processing, the
LIF_NO_SENDMSG flag should be set in order to prevent recursive calls to the
window procedure.

It is recommended that the LIF_NO_SENDMSG flag is NOT turned on when
WinSet/QueryLanginfo is called outside the window procedure whose attributes
are being set. Applications should generally use the default flag (which causes
a WM_SETBIDIATTR message to be sent), so that bidi-aware window procedures can
take the appropriate actions when a request to change their Bidi attributes is
made.


ΓòÉΓòÉΓòÉ 4. Bidirectional Status ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 4.1. About Bidirectional Status ΓòÉΓòÉΓòÉ

Every window in the system maintains its bidirectional status.

Bidirectional status flags are used to represent configuration information that
tells the system how to handle various events for the window. The status flags
include information that defines how bidirectional language hotkeys should be
handled and its current typing mode.

The bidirectional status is saved by the system for each window and it can be
set and queried by applications using the WinSetLangInfo API.


ΓòÉΓòÉΓòÉ 4.2. Managing Bidirectional Status using the WinSetLangInfo API. ΓòÉΓòÉΓòÉ

The WinSetLangInfo API is used to manipulate the window bidi status word.

The Bidirectional status flags hold information about the following :

   o  Status of the bidirectional input support (enabled/disabled).

   o  Hotkey disable flags.

   o  AutoPush enable flags.

 The PM Bidirectional Support defines several hotkeys that allow the user to
 perform Bidi-related operations such as Start Push or Field Reverse.

   o  Status of the bidirectional Input Support.

      When this flag is set ON, the bidirectional input support system is
      disabled. The input system operates in the same way as in a non-bidi (e.g
      US/English) system.

   o  Hotkey disable flags

      The hotkey disable flags are used by the system to process the various
      bidirectional hotkeys. When a certain flag is ON this tells the system
      that the default system action for this hotkey (identified by the flag)
      is disabled. Applications can disable hotkeys that use key combinations
      which the application wishes to handle itself.

      When a disabled bidirectional hotkey combination is detected, the system
      does not take any special action and passes the event to the application.
      This allows the application to receive notification about the hotkey
      being typed and take the necessary action. In addition, the system also
      generates a WM_CHAR event with a Virtual Key value (VK_) appropriate to
      this hotkey. This allows applications to isolate themselves from the
      actual key combination and be sensitive only to the virtual key value
      (this allows remapping of the bidi hotkeys).

      When a hotkey is enabled, the system will translate the key combination
      to the relevant bidi virtual key identifier. Applications that respond to
      the bidirectional hotkeys will take the appropriate action when they
      detect the virtual key identifiers. The system may also take some actions
      based on the hotkey being pressed (such as changing the keyboard layer,
      see below).

   o  AutoPush enable flags.

      Bidirectional status also contain enable/disable flags for 'Automatic
      Push'. These flags tell the system if the user has enabled the 'AutoPush'
      feature for the PM entry fields. (AutoPush enabled means that the system
      starts and ends Push mode automatically, based on the characters that are
      typed by the user. AutoPush is only relevant if the PM entry field
      contains visual text). There are two AutoPush flags, one for typing in
      Left-To-Right direction and one for typing in Right-To-Left.


ΓòÉΓòÉΓòÉ 4.2.1. Using the WinSetLangInfo API to send WM_SETBIDISTAT messages ΓòÉΓòÉΓòÉ

The WM_SETBIDISTAT message is optionally sent to a window procedure every time
a window bidirectional status word is set. Likewise, the WM_QUERYBIDISTAT can
be sent when the status is queried. This lets a bidi-aware window procedure
know that its status is being change and to take the appropriate action, if
required. In general, these messages are sent and processed in the same way as
the WM_SETBIDIATTR and WM_QUERYBIDIATTR message, as described in the "Sending
WM_SETBIDIATTR messages in WinSetLangInfo API".


ΓòÉΓòÉΓòÉ 5. Keyboard Input and Keyboard Layers ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 5.1. What are keyboard layers? ΓòÉΓòÉΓòÉ

On keyboards used for bidirectional languages, two characters (a Latin one and
a "National Language" one) are engraved on each key and the user can select
which of these characters is used, by selecting the active keyboard language
(or "Keyboard Layer").

Changing the keyboard layer can be done by the user pressing one of the "Layer
Change" hotkeys, or by an application issuing the WinSetKbdLayer API. In this
way, the same physical keyboard is used to input text in both languages.

CUA guidelines define the "keyboard layer change" hotkeys as follows:

   o  Select Latin/English layer - Alt+Left Shift.

   o  Select National Language layer (Arabic/Hebrew) - Alt+Right Shift.


ΓòÉΓòÉΓòÉ 5.2. Managing Keyboard Layers using the WinSetKbdLayer API. ΓòÉΓòÉΓòÉ

Keyboard layers are set and queried by the WinSetKbdLayer and the
WinQueryKbdLayer APIs. These APIs are provided so that applications can set the
keyboard to produce characters in the language that is required by the
application for a specified window (or text input field). Issuing a
WinSetKbdLayer API by an application is equivalent to pressing a "Layer Change"
hotkey by the user.


ΓòÉΓòÉΓòÉ 5.2.1. WM_KBDLAYERCHANGED message ΓòÉΓòÉΓòÉ

When the keyboard layer is changed, a WM_KBDLAYERCHANGED is optionally posted
to the window procedure that has keyboard focus, to notify it about the
keyboard layer change. This lets the window procedure take the appropriate
action (such as updating its internal variables and/or updating some status
display).

The message is sent only when the WinSetKbdLayer API is specifically instructed
to do so by specifying the SKLF_SENDMSG flag.


ΓòÉΓòÉΓòÉ 5.3. Bidirectional Hotkeys Processing ΓòÉΓòÉΓòÉ

The system performs some processing for bidi hotkeys. When bidi hotkeys are
detected, the system generates WM_CHAR messages containing the appropriate Bidi
virtual keys (VK_XX values). The system may also take some default action
depending on whether the specific hotkey is enabled or disabled (see below).

Note:   The term Enable/Disable of Bidi Hotkey is a bit mis-leading. The effect
of disabling a bidi hotkey does not neccessarily disable the hotkey itself -
but the system default processing that is associated with this hotkey. For
example, when the start push hotkey is disabled the Push Popup is NOT invoked
(this is the default action taken by the system for VK_START_PUSH). The
WM_CHAR/VK_START_PUSH message is generated in any  case.

Whenever the system detects a Bidi hotkey which is enabled, the following
actions take place:

   o  A WM_CHAR message containing the bidi VK value is generated.

   o  The message containing the hotkey combination is consumed.

   o  The system performs some default action for relevant hotkeys.

 The following is the default action taken by the system for each enabled
 hotkey:

   o  Set keyboard layer to Latin or National

      The appropriate keyboard layer is set for the window.

   o  Start push

      The Bidi "Push Popup" IME is invoked.

   o  End push

      No action is taken.

   o  Field reverse (toggle)

      Field reverse edit mode is activated.

   o  Window reverse (toggle)

      No action is taken.

   o  Activate auto push mode (toggle)

      No action is taken.

   o  Arabic shape selection hotkeys

      No action is taken.

   o  Activate Status Indicator

      The Language Viewer is invoked, if one is registered in the system.

 Whenever the system detects a Bidi hotkey which is disabled, it does not
 generate the default action associated with this hotkey. Note that the
 generation of the VK_ value is NOT suppressed.

 The following actions take place:

   o  A WM_CHAR message containing the bidi VK value is generated.

   o  The message containing the hotkey combination is not consumed. I.e.
      applications get both the VK value and the original key combination.

   o  No default action is performed by the system.

 Bidi aware applications that wish to process some hotkeys themselves may
 choose to disable them in order to prevent the system from taking the default
 action.

 For example, a wordprocessor would probably disable the VK_START_PUSH hotkey,
 to stop the system from bringing up the push popup dialog, since the
 application will provide right-to-left typing functionality itself.


ΓòÉΓòÉΓòÉ 6. Bidirectional Support in PM Controls ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 6.1. About Bidirectional Support of PM Controls ΓòÉΓòÉΓòÉ

PM Controls are windows which are provided as part of the PM system. PM
controls are used by applications to carry out simple input and output tasks
(such as simple data entry, and choice selection).

PM Controls are bidi-aware windows which support bidirectional attributes and
status. Thus they are sensitive to the various settings in the bidi attributes
and bidi status and take actions accordingly. For example, PM controls support
the 'window orientation' bidi attribute by formatting and displaying themselves
according to the current orientation setting. Another example is their
awareness to the active keyboard layer, especially in windows that process text
input, such as the single-line Entry Field (SLE).

By using the bidi-aware PM controls, applications can achieve high degree of
bidirectional support, since many tasks that are specific to bidirectional
support, are provided "automatically" by the controls, on behalf of the
application. In other words, as PM controls relieve the application from
implementing code for routine and simple tasks (such as text input), they also
relieve the application (to an extent), from dealing with specific
bidirectional processing required for these tasks.


ΓòÉΓòÉΓòÉ 6.2. Using BIDIPARAMs in Resource Scripts. ΓòÉΓòÉΓòÉ

PM Controls are usually defined in Resource Scripts. Usually, modfiying
resources does not require the application developer to change code in the
application.

The BIDIPARAM keyword is used to mark PM controls as having specific
bidirectional features (attributes and status). Using the BIDIPARAM keyword in
a resource script allows the application developer to change the definition of
a PM control window, such that when created it behaves "automatically" in a
certain bidirectional manner (e.g, it is formatted "automatically" as a
"Right-To-Left" window, or is initially ready to accept Arabic/Hebrew text).

BIDIPARAMs are inherited to child windows. For example, specifying BIDIPARAMs
for a dialog window resource, affects all child-windows in that dialog.

The BIDIPARAM keyword is specified with two parameters. The first one is the
bidi feature that is manipulated (i.e a certain bidirectional attribute, or a
certain bidirectional status flag) and the second parameter is the value that
is given to that feature. In the following example, the dialog window is marked
has having Right-To-Left window orientation. All child windows inherit this
feature, except for the entry field which is specified has having a
Left-To-Right window orientation. In addition the radio button is marked has
having "Implicit" text type.

DLGTEMPLATE ID_SAMPLE LOADONCALL MOVEABLE DISCARDABLE
BEGIN
    DIALOG "Sample Bidirectional Dialog", ID_SAMPLE, 5, 10, 100, 50,
    FS_DLGBORDER
    BIDIPARAM      PP_BDATTR_WND_ORIENTATION  BDA_WND_ORIENT_RTL

    BEGIN

       ENTRYFIELD     "", ID_ENTRY,  5, 80, 40, 8
       BIDIPARAM      PP_BDATTR_WND_ORIENTATION BDA_WND_ORIENT_LTR

       RADIOBUTTON    "Radio", ID_RADIO, 5, 60, 40, 8
       BIDIPARAM      PP_BDATTR_TEXTTYPE BDA_TEXTTYPE_IMPLICIT

       CHECKBOX       "Check", ID_CHECK1, 5, 50, 40, 8
   END
END

The following is a list of PM controls with a short description of their
bidirectional support behavior.


ΓòÉΓòÉΓòÉ 6.3. Button ΓòÉΓòÉΓòÉ

The Button control handles its text according to its window bidi attributes.

Radio buttons and Checkboxes with right-to-left window orientation behave as
follows:

   o  The Selection Icon (a little Box for Check Box, a little circle for Radio
      Buttons) is right justified. It is located in the right symmetric
      position, relative to its position in a <r Button.

   o  The Text of the Button, is displayed to the left of the Selection Icon,
      and is right justified.

   o  It switches the language layer to the national language , so it can
      process Arabic/Hebrew

             "Mnemonics" entered from the keyboard.


ΓòÉΓòÉΓòÉ 6.4. Combination-Box ΓòÉΓòÉΓòÉ

The bidi attributes of the listbox part and the entryfield part of the
combination box are "linked" (i.e changing one of them causes the other to
change as well).

When the combination box has right-to-left window orientation the listbox is
located beneath and to the left of the entryfield. The left side of the listbox
is aligned with the left side of the entryfield.


ΓòÉΓòÉΓòÉ 6.5. Container ΓòÉΓòÉΓòÉ

The Container control manages a hierarchy of bidi attributes which resembles
the hierarchy of the container components.

A container control typically has the following hierarchy:

   Container --> Record(s) -->  Field(s)

Initially, records and fields do not have bidi attributes of their own (their
bidi-attribute are not-initialized). At this time, their effective bidi
attributes are those of the container window.

Applications can set their container's records or fields bidi attributes by
sending the CM_SETITEMBIDIATTR and CM_SETFIELDBIDIATTR messages..

They can query their container's records and fields bidi attributes by sending
CM_QUERYTEMBIDIATTR and CM_QUERYFIELDBIDIATTR.

The bidi-attributes hierarchy of the container works as follows:

   o  A field uses its own bidi attribute (set by CM_SETFIELDBIDIATTR).

   o  If its bidi-attribute has not been initalized (by sending the
      CM_SETFIELDBIDIATTR message), a field uses the bidi attribute of its
      record.

   o  A record uses it own bidi attribute (set by CM_SETITEMBIDIATTR).

   o  If its bidi-attribute has not been initialized (by sending the
      CM_SETITEMBIDIATTR), a field uses the bidi attribute of the container
      window.

 The following is the description of the container window messages that are
 used to manage bidi attributes:

  CM_SETITEMBIDIATTR - Set bidi attributes for a specific item (record)

     mp1 - PRECORDCORE pRecordCore
     mp2 - pointer to the following structure.

     typedef struct _BD_ATTR_MASK
           {
           ULONG  ulBD_Attr;
           ULONG  ulBD_Mask;
           } BD_ATTR_MASK;

  CM_QUERYITEMBIDIATTR - Queries the bidi attributes of a specific
                         item (record).
     mp1 - PRECORDCORE pRecordCore
     mp2 - PULONG      pBidiAttr - points to a ULONG where BidiAttributes
                                   are returned.

  CM_SETFIELDBIDIATTR: - Sets bidi attributes for a specific field (in
                         details view only).

     mp1 - PFIELDINFO pFieldInfo
     mp2 - pointer to the following structure.

     typedef struct _BD_ATTR_MASK
           {
           ULONG  ulBD_Attr;
           ULONG  ulBD_Mask;
           } BD_ATTR_MASK;

  CM_QUERYFIELDBIDIATTR - Queries the bidi attributes of a specific field
                          (in details view only).

     mp1: PFIELDINFO pFieldInfo
     mp2: PULONG     pBidiAttr - points to a ULONG where BidiAttributes
                                 are returned.

 In general, when the window orientation of the Container is RtL its
 presentation and behavior is symmetric to the one used in LtR orientation.
 Some specific points are:

   o  "First" is considered on the right, "Next" is to the left. For example,
      the "First" view in a split details view is on the right and the "second"
      is on its left.

   o  Justification of fields is determined by the field attribute word
      (CFA_LEFT, CFA_RIGHT). If no justification is specified, then the default
      justification is determined according to the effective bidi attribute of
      the field (if WND_ORIENT_RTL then default justification is RIGHT). See
      more, below, on "effective" bidi attributes.

   o  Vertical scroll-bars are positioned at the left side of the container and
      horizontal scrollbars are assigned RtL orientation (see section on bidi
      support for scrollbars).


ΓòÉΓòÉΓòÉ 6.6. Dialog Box ΓòÉΓòÉΓòÉ

The dialog box manager (which is activated using the WinDlgBox and
WinProcessDlg APIs) inherits its OWNER window bidi attributes. This attributes
are inherited to its child windows, except if the child window has predefined
BIDIPARAM.

When the window orientation of the DialogBox is right to left, all child
controls are positioned in their symmetric position in the window.


ΓòÉΓòÉΓòÉ 6.7. Entry-Field (Single-Line) ΓòÉΓòÉΓòÉ

The single-line entry field processes its text according to its bidi attributes
and according to the user interface convention used (Manual/Visual or
Automatic/Implicit).

See more about the user interface of the entry field in the user documentation
of the OS/2 Hebrew/Arabic National Language Version.


ΓòÉΓòÉΓòÉ 6.8. Entry Field (Multi-Line) ΓòÉΓòÉΓòÉ

The multi-line entry field processes its text according to its bidi attributes
and according to the user interface convention used (Manual/Visual or
Automatic/Implicit).

See more about the user interface of the entry field in the &pmug. publication.


ΓòÉΓòÉΓòÉ 6.9. Frame ΓòÉΓòÉΓòÉ

When the frame control has right-to-left window orientation, the position of
its controls is symmetric to the position in left-to-right orientation, except
for the system-menu, and min-max controls that stay at the same position.

The frame responds to the WM_SETBIDIATTR message by re-positioning of its
controls. It also sends the message to the client window.


ΓòÉΓòÉΓòÉ 6.10. Listbox ΓòÉΓòÉΓòÉ

The &rtl behavior of the List Box results in the justification of the text in
each listbox item. In a &rtl Listbox, the text of the items is right-justified
(as opposed to left-justification in the original, <r Listbox).

In addition, the display of the text is done in the correct order, according to
the bidi attributes of the listbox window.


ΓòÉΓòÉΓòÉ 6.11. Menu ΓòÉΓòÉΓòÉ

The menu control processes it items' text according to its bidi attributes.

When the menu's window orientation is RtL, the Menu control operates in a
symmetric way relative to the behavior of the original (LtR) Menu control.

In RtL action Bars, the arrow keys behave in a visual way. I.e. The Right-Arrow
key is considered to have a 'Backward' operation and the Left-Arrow key is
considered to have 'Forward' operation.

The menu supports mnemonics in the "correct" keyboard layer. The menu control
sets the keyboard layer based on the language of the first mnemonic character
defined in the menu. This means, that it is expected that in a certain menu,
the application uses only one language for mnemonic characters.

For Arabic: All character shapes of any Arabic mnemonic are accepted.


ΓòÉΓòÉΓòÉ 6.12. Notebook ΓòÉΓòÉΓòÉ

Selecting various BKS_ notebook styles together with setting the window
orientation to right-to-left can be used to construct a notebook which
resembles a right-to-left notebook.

When the notebook control has RtL window orientation, the page arrows have
their roles reversed: the left arrow turns the pages forwards, whereas the
right one - backwards. The text of Tabs, and Status line is converted according
to their Bidi Attributes.

For Arabic, mnemonic specified in TABs are normalized to their base shapes.

The notebook control processes the views of its internal objects (Tabs,
Status-Line and Page-Arrows) according to their bidi attributes. Applications
are responsible for processing the views of their own page components (e.g
dialog controls) by setting the appropriate bidi attributes to these
components.

The internal objects use the bidi attributes of the notebook window, unless
their bidi attributes are specifically set using one of the following messages:

   o  BKM_SETTABTEXTBIDIATTR

   o  BKM_SETSTATUSLINEBIDIATTR

   o  BKM_SETPAGEINFO

 Applications can query the bidi attributes of their tabs and status-line page
 components using the following messages:

   o  BKM_QUERYTABTEXTBIDIATTR

   o  BKM_QUERYSTATUSLINEBIDIATTR

   o  BKM_QUERYPAGEINFO

 When the notebook control receives the WM_SETBIDIATTR message it modifies its
 own bidi attributes (and as a result - its appearance).


ΓòÉΓòÉΓòÉ 6.13. Slider ΓòÉΓòÉΓòÉ

The Value Set control processes it text according to its window bidi
attributes.

The SLS_HOMERIGHT style of the Slider control is used to support RtL window
orientation for this control.


ΓòÉΓòÉΓòÉ 6.14. Spin Button ΓòÉΓòÉΓòÉ

The entryfield part of the Spin Button control inherits the same bidi
attributes as those of the Spin Button window. It behaves in the same way as
the 'normal' entry field.

When the SpinButton control has RtL window orientation, the location of the
"arrow-window" is on the left side of the window.


ΓòÉΓòÉΓòÉ 6.15. Static ΓòÉΓòÉΓòÉ

The Static control processes its text according to its window bidi attributes.

The DT_RIGHT flag is the default when the window has RtL orientation.

The DT_WORDBREAK is sensitive to the text orientation in the BiDi attributes
word.

When SS_GROUPBOX is specified in Static controls that have RtL window
orientation, the text is right-justified.


ΓòÉΓòÉΓòÉ 6.16. Title-Bar ΓòÉΓòÉΓòÉ

The Title-Bar control processes its text according to its window bidi
attributes.

When the Title-Bar control has Rtl window orientation:

   o  Text is right-justified.

   o  Text is truncated on the left side.

 The same behavior (truncation on the left) is also performed if the titlebar
 text is all Arabic or Hebrew (i.e, does not contain any English character).


ΓòÉΓòÉΓòÉ 6.17. Value Set ΓòÉΓòÉΓòÉ

The Value Set control processes it text according to its window bidi
attributes.

The VS_RIGHTTOLEFT style is used to make the Value Set control have RtL window
orientation.

Each item in the Value Set can have its own bidirectional attributes. Managing
the item bidi attributes is performed by the following window messages:

   o  VM_SETITEMBIDIATTR - Sets a ValueSet Item's bidi attributes.

   o  VM_QUERYITEMBIDIATTR - Queries a ValueSet Item's bidi attributes.

 If no item bidi attribute is set using the VM_SETITEMBIDIATTR message the item
 uses the window bidi attributes.

 Parameters of VM_SETITEMBIDIATTR:

 mp1 - MPFROM2SHORT(usLine, usColumn)

 mp2 - pointer to the following structure.

     typedef struct _BD_ATTR_MASK
           {
           ULONG  ulBD_Attr;
           ULONG  ulBD_Mask;
           } BD_ATTR_MASK

 Parameters of VM_QUERYITEMBIDIATTR:

 mp1 - MPFROM2SHORT(usLine, usColumn)

 mp2 - PULONG pBidiAttr - points to a ULONG where bidi attributes are returned.


ΓòÉΓòÉΓòÉ 7. Bidirectional Support in Standard Dialogs ΓòÉΓòÉΓòÉ

All standard dialogs (File dialog, Font dialog and the Messagebox) support a
Right-To-Left/NLS mode. In this mode, their standard text is in the national
language  and the general orientation of the dialog is right-to-left. Standard
dialogs can be made to work in this mode as a result of an application
interface (specific for each standard dialog) or when the the environment
variable STDDLGLANG is set to 'NATIONAL'. The following is a description of the
Right-To-Left/NLS mode of each of the standard dialogs:


ΓòÉΓòÉΓòÉ 7.1. File Dialog ΓòÉΓòÉΓòÉ

Application interface: The FDS_NATIONAL_LANGUAGE 'style' bit.

When the standard file dialog is RtL/NLS:

   o  Orientation is right-to-left.

   o  Field names and buttons are in the National Language.

   o  Data in controls that pertain to filenames and directory names is
      implicit.


ΓòÉΓòÉΓòÉ 7.2. Font Dialog ΓòÉΓòÉΓòÉ

Application interface: The FNTS_NATIONAL_LANGUAGE 'style' bit.

When the standard font dialog is RtL/NLS:

   o  Orientation is right-to-left.

   o  Field names and buttons are in the National Language.

   o  Data in controls that pertain to font names is VISUAL for Hebrew and
      Implicit for Arabic.


ΓòÉΓòÉΓòÉ 7.3. MessageBox ΓòÉΓòÉΓòÉ

Application interface: Owner Window orientation is right-to-left.

When the message box is RtL/NLS:

   o  Text is right-justified in the titlebar and inside the messagebox.

   o  Icons (if specified) are on the right side of the messagebox.

   o  Push buttons are ordered from right-to-left.

   o  Push buttons have their text in the national language.


ΓòÉΓòÉΓòÉ 8. Bidirectional Text Exchange Among Applications ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 8.1. Clipboard ΓòÉΓòÉΓòÉ

The clipboard is a mechanism provided by PM to allow the user to transfer data
between different applications. To do so, the user selects some data in a
window, "copies" (or "cuts") it to the clipboard and then "pastes" the data in
the target application.

When dealing with bidirectional data, it may be required to transfer text data,
that has different bidirectional attributes (i.e, different format of text)
between applications. Accordingly, a conversion of the text must be performed,
in order to transform the text to a format (identified by bidirectional
attributes) which is compatible with the target application (the one that
"pastes" the data).

The PM bidirectional support provides automatic conversion of text between
source and target applications, based on their process bidirectional
attributes. In addition, bidi-aware applications can explicitly set the
bidirectional attributes managed by the clipboard in order to affect the
conversion that is performed on the text.

In order to allow the automatic conversion of the clipboard, the following
conditions must be met:

   o  Both the source and the target applications have valid process
      bidirectional attributes (i.e, their bidi attributes are not 0).

   o  Exchange of CF_TEXT and CF_DSPTEXT format is performed.

   o  The source and target bidi attributes are different.

   o  None of the applications (i.e, neither the source application nor the
      target one) have issued any APIs to cancel the conversion provided by the
      clipboard.

 The clipboard maintains two sets of bidirectional attributes.

 The first set is called the 'Clipboard Bidirectional Attributes' and is
 associated with the text data that is currently stored in the clipboard. The
 default value for this set is inherited from the process bidirectional
 attributes of the application that issues WinSetClipbrdData. The source
 application can optionally modify this set of attributes by using the
 WinSetLangInfo API with the LI_BD_CLIP_ATTR effect.

 The second set is called the 'Conversion Bidirectional Attributes'. This set
 is associated with the target application, and its default value is inherited
 from the process bidirectional attributes of the application that issues the
 WinQueryClipbrdData API. The target application can optionally modify these
 attributes by using the WinSetLangInfo API with LI_BD_CLIP_CONV_ATTR effect.

 When using the WinSetLangInfo API to change the clipboard data, bidi-aware
 applications must follow the following rules:

   o  Setting of both the 'Clipboard bidi attributes' and the 'conversion bidi
      attributes' must be performed only when an application has access to the
      clipboard - i.e, after issuing WinOpenClipbrd and before issuing the
      WinCloseClipbrd APIs.

   o  Setting LI_BD_CLIP_ATTR must be done AFTER data has been put into the
      clipboard (that is, after issuing WinSetClipbrdData).

 The following is a typical scenario. Lines marked with '(BD)' are optional,
 and can be issued by bidi-aware applications.

    Setting Clipboard Bidirectional Data.
    -------------------------------------

    WinOpenClipbrd()
    WinEmptyClipbrd()
    WinSetClipbrdData(CF_TEXT)     (clipboard bidi attributes are set -
                                    inheited from process bidi attributes).

    (BD) WinSetLangInfo(LI_BD_CLIP_ATTR..) (clipboard bidi attribute are set)

    WinCloseClipbrd()


    Querying Clipboard Bidirectional Data
    --------------------------------------

     WinOpenClipbrd()

     (BD) WinQueryLangInfo(LI_BD_CLIP_ATTR...)
                                    (Queries the current clipboard
                                     bidi attributes).
     (BD) WinSetLangInfo(LI_BD_CLIP_CONV_ATTR...)
                                    (sets the clipboard conversion
                                     bidi attributes).
      WinQueryClipbrdData(CF_TEXT)   (clipboard performs conversion on
                                      the text, using the clipboard
                                      and the conversion bidi attributes.
      WinCloseClipbrd()


ΓòÉΓòÉΓòÉ 8.2. Dynamic Data Exchange (DDE) ΓòÉΓòÉΓòÉ

Dynamic data exchange is performed between windows. Thus, conversion of
bidirectional text, if required, is based on the bidirectional attributes of
the windows which are involved in the data exchange.

   o  The conversion is performed at WinDdePostMsg() time, using the hwndTo and
      hwndFrom bidi attributes (which are parameters of the WinDdePostMsg API).

   o  Bidi-aware applications can force no conversion by setting the bidi
      attributes of any window that is involved in the data exchange to 0.

   o  Conversion is done only for WM_DDE_DATA messages and only when the format
      of data being exchanged is DDEFMT_TEXT.

 Notes:

   o  It is recommended that application names and item names (that are used by
      an application in the process of "making the DDE contact" with other
      applications) are in English. This is because conversions occur only at
      WM_DDE_DATA and not in WM_DDE_INITIATE time, and also because at
      WM_DDE_INITIATE time, there is no window handle from which the system can
      deduce the bidi attribute of the application name and item text.

   o  It is recommended that bidi-aware applications use "invisible" windows
      (or object windows) as the DDE source and target windows. This gives them
      the freedom to set their windows bidi attributes to any value without
      having to worry about the visual effect this may have on the display.


ΓòÉΓòÉΓòÉ 8.3. Direct Manipulation ΓòÉΓòÉΓòÉ

There is no specific bidirectional support implemented in the system support
for Direct Manipulation.

Bidi-Aware applications that add their own type of 'direct manipulation
mechanism' (such as a spreadsheet program externalizing its drag & drop
mechanism, so that another application can interface with it), must publish, as
part of their interface specification, the bidi attributes, so that other
applications, which may use different types of text, can do the necessary bidi
text conversion, if required.


ΓòÉΓòÉΓòÉ 9. Information Presentation Facility ΓòÉΓòÉΓòÉ

The Bidirectional support in the PM Information Presentation Facility has the
following components:

   o  A modified version of the Help Compiler named IPFCBIDI.  This component
      provides all the functions of the regular IPFC program, with the addition
      of some Bidirectional features.

   o  Runtime support for Bidirectional help documents.


ΓòÉΓòÉΓòÉ 9.1. Bidirectional features of the IPFCBIDI compiler ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 9.1.1. Compiler Invocation ΓòÉΓòÉΓòÉ

IPFCBIDI accepts new values for the "/LANGUAGE" parameter:

 ARA       for Arabic

 HEB       for Hebrew

 Examples using the new values:

  IPFCBIDI myfile.txt /INF /COUNTRY=785 /CODEPAGE=864 /LANGUAGE=ARA
  IPFCBIDI myfile.txt /INF /COUNTRY=972 /CODEPAGE=862 /LANGUAGE=HEB

 Note that the Bidirectional functionality of the compiler and of the Help
 Viewer is only enabled when the language is explicitly specified as Arabic or
 Hebrew.


ΓòÉΓòÉΓòÉ 9.1.2. Grammar Files ΓòÉΓòÉΓòÉ

When the new values of "/Language" are used, the corresponding names for the
grammar files are:

   o  IPFARA.NLS

   o  IPFHEB.NLS.

 When the language is Arabic or Hebrew, it is expected that at least one
 statement in the corresponding grammar file will be affected: the "WORD"
 statement should define both Latin characters and National (Arabic or Hebrew)
 letters.


ΓòÉΓòÉΓòÉ 9.1.3. Source File Bidirectional Format ΓòÉΓòÉΓòÉ

When the language is Arabic or Hebrew, the .IPF source file must have one of
the following formats:

 Implicit
      Latin and National (Arabic or Hebrew) characters are arranged in typing
      order in successive positions of the source file.

      Arabic characters should be stored in their base shapes.

 Visual - left to right
      Characters are stored in an order ready for display or printing

 Visual - right to left
      The order of the characters is the mirror image of the previous format.

 It is possible to specify the format of the source file by adding a special
 attribute to the "USERDOC" tag, as in the following examples:

     :userdoc text=IMPLICIT.
     :userdoc text=VISUAL_LTR.
     :userdoc text=VISUAL_RTL.

 If the text attribute is not specified with the "USERDOC" tag, the default is:

     :userdoc text=IMPLICIT.


ΓòÉΓòÉΓòÉ 9.1.4. Justification ΓòÉΓòÉΓòÉ

When language is Arabic or Hebrew, the default justification is changed to
right justification for the following:

   1. line alignment ("align" attribute of the "LINES" tag)

   2. figure alignment ("align" attribute of the "FIG" tag)

   3. bitmap alignment ("align" attribute of the "ARTWORK" tag)

   4. window positioning ("x" attribute of the "H" tag) of a window relatively
      to its parent window.
 Examples:

 The tag below causes a window to be right-justified:

     :h1 id=sample1. This is a right-justified Window.

 The tag below causes a window to be left-justified:

     :h1 id=sample21 x=left. This is a left-justified Window.

 The tag below causes the next lines to be left aligned:

     :lines align=left.

 The tag below causes the next lines to be right aligned:

       :lines.



ΓòÉΓòÉΓòÉ 9.2. Runtime support for Bidirectional help documents ΓòÉΓòÉΓòÉ

The runtime support for Bidirectional help documents (both .inf and .hlp files)
is active only for documents that were compiled with IPFCBIDI using /L=ARA or
/L=HEB. Such documents will be referred to as "Bidi documents."

Documents compiled with the non-bidi ipfc compiler and documents compiled with
IPFCBIDI and any non-bidi language will not be affected by the Bidi runtime
support.


ΓòÉΓòÉΓòÉ 9.2.1. User Interface ΓòÉΓòÉΓòÉ

When a Bidi document is loaded, the user interface of the help manager,
including menus, dialogs, buttons and help will be in the national language.


ΓòÉΓòÉΓòÉ 9.2.2. Display ΓòÉΓòÉΓòÉ

The reading direction for Bidi documents is from right to left. Help manager
structures in general will be displayed as a mirror image of their non-Bidi
counterparts. This means they will be right justified instead of left
justified.

Some examples of such help manager structures include:

   o  Headers
   o  Table of contents
   o  Figures
   o  Footnotes
   o  Index
   o  Paragraphs
   o  Lines
   o  Lists of all kinds
   o  Examples
   o  Tables

      Columns within a table go logically from right to left.


ΓòÉΓòÉΓòÉ 9.2.3. Concatenation of inf files ΓòÉΓòÉΓòÉ

When multiple inf files are viewed together, the helpmanager will behave as if
the entire document is Bidi if any one of the inf files was compiled as a Bidi
document.


ΓòÉΓòÉΓòÉ 10. The Language Viewer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 10.1. About the Language Viewer ΓòÉΓòÉΓòÉ

The Language Viewer is a tool which is provided to help the user identify the
current state of the language support, by providing visual indications that
represent the current bidirectional state of the window that has the focus.

The default Viewer is implemented as a PM/WorkplaceShell application that shows
a number of icons that represents the current bidirectional attributes as well
as the active keyboard layer of the window that has the PM focus.

The Viewer is optional. The PM bidirectional support works even if the viewer
application is not active. In addition, the viewer can be replaced by a
user-written application. Such an application can modify the visual effect that
is provided to the user, allowing for more flexibility of the user-interface.


ΓòÉΓòÉΓòÉ 10.2. Setting a New Language Viewer ΓòÉΓòÉΓòÉ

An application that wishes to act as a Language Viewer uses the
WinSetLangViewer API. This allows the application to define a window handle
that is known to PM to be the new Language Viewer window. PM supports only one
Language Viewer. That is, when WinSetLangViewer is issued, the window handle
that is referenced becomes the new viewer, and the old viewer does not function
as a viewer anymore.

When a window acts as a Language Viewer it receives WM_LANGVIEWINFOCHANGED
messages from the system. These messages define the current changes in
bidirectional state that are made to the window that has the focus. Also, PM
posts a WM_LANGVIEWINFOCHANGED message to the Language Viewer window to notify
it that it should update its display, since a new window (probably with a
different set of bidi attributes and keyboard layer) becomes the focus window.


ΓòÉΓòÉΓòÉ 10.3. Invoking the options dialog. ΓòÉΓòÉΓòÉ

The default Viewer invokes the option dialog in response to the
WM_LANGOPTIONSDIALOG message. This is sent to the viewer by the system in
response to the "Invoke language viewer" hotkey, but may also be sent to the
viewer by any application.


ΓòÉΓòÉΓòÉ 11. Environment Variables used for Language Support ΓòÉΓòÉΓòÉ

The OS/2 Language support for bidirectional languages uses environment
variables as a means of configuring specific applications. Setting environment
variables is similar to setting the language settings in the Program and
ProgramFile Workplace Shell objects.

The following environment variables are supported:

   o  BIDIATTR - Defines the Bidirectional Attributes for the session.

      Possible values for this keyword:

        -  INIT - Initializes a Bidi Attribute.
        -  TEXTTYPE_VISUAL - Visual type of text.
        -  TEXTTYPE_IMPLICIT - Implicit type of text.
        -  WND_ORIENT_LTR - Left-to-right window orientation
        -  WND_ORIENT_RTL - Right-to-left window orientation
        -  TEXT_ORIENT_LTR - Left-to-right text orientation
        -  TEXT_ORIENT_RTL - Right-to-left text orientation
        -  TEXT_ORIENT_CONTEXT - Text orientation is determined dynamically
           upon the context (based on the actual characters that construct the
           text string).
        -  SYM_SWAP_OFF - Symmetric swapping of directional characters is not
           handled automatically.
        -  SYM_SWAP_ON - Symmetric swapping of directional characters is
           handled automatically.
        -  NUMERALS_NOMINAL   - Display only nominal (i.e. Arabic) numerals
        -  NUMERALS_NATIONAL  - Display only national (i.e. Hindi) numerals
        -  NUMERALS_CONTEXT   - Display numerals according to surrounding text
        -  NUMERALS_PASSTHRU  - Do not process numerals on display
        -  TEXT_DISPLAY_SHAPED - Automatically shape text upon display

            The following are valid shaping modes, but it is not recommended to
           use them as system settings in CONFIG.SYS.
        -  TEXT_SAVE_SHAPED   - Assume that text is already shaped, and
           automatically shape new text as it is being entered by the user.
        -  TEXT_SHAPE_INITIAL  - Assume that text is already shaped and new
           text is entered in initial mode
        -  TEXT_SHAPE_MIDDLE  - Assume that text is already shaped and new text
           is entered in middle mode
        -  TEXT_SHAPE_FINAL   - Assume that text is already shaped and new text
           is entered in final mode
        -  TEXT_SHAPE_ISOLATED - Assume that text is already shaped and new
           text is entered in isolated mode
        -  TEXT_SHAPE_NOMINAL  - Display and store text in its nominal (base)
           shapes.

         Example:  SET BIDIATTR=WND_ORIENT_RTL, TEXTTYPE_IMPLICIT

   o  BIDISTAT - determines the configuration of the system support for
      bidirectional languages. Allowed values are:

        -  DISABLE_INPUT_PROCESSING - disables all processing done by the
           system for input (all hotkeys are disabled).
        -  HKFLAG_ENG_LAYER - disables the "English Language" hotkey.
        -  HKFLAG_NAT_LAYER - disables the "National Language" hotkey.
        -  HKFLAG_PUSH - disables the "Start Push" hotkey.
        -  HKFLAG_END_PUSH - disables the "End Push" hotkey.
        -  HKFLAG_AUTO_PUSH - disables the "AutoPush" toggle hotkey.
        -  HKFLAG_FIELD_REV - disables the "Field Reverse" hotkey.
        -  HKFLAG_SCREEN_REV - disables the "Window Reverse" hotkey.
        -  HKFLAG_STATUS_INDICATOR - disables the "Language Viewer" hotkey.
        -  HKFLAG_DISPLAY_SHAPED - disables the "Display Shaped/Automatic"
           hotkey.
        -  HKFLAG_INITIAL - disables the "Initial" hotkey
        -  HKFLAG_MIDDLE - disables the "Middle" hotkey
        -  HKFLAG_FINAL - disables the "Final" hotkey
        -  HKFLAG_ISOLATED - disables the "Isolated" hotkey
        -  HKFLAG_SAVE_SHAPED - disables the "Save shaped" hotkey
        -  FAUTOPUSH_RTL_ON - Sets AutoPush for right-to-left fields ON.
        -  FAUTOPUSH_LTR_ON - Sets AutoPush for left-to-right fields ON.

         Example:  SET BIDISTAT=HKFLAG_STATUS_INDICATOR

   o  STDDLGLANG - configures the language and appearance of standard dialog
      (like "Save file" dialog) and message box buttons. Allowed values are:

        -  ENGLISH - Language is English and orientation is left-to-right.
        -  NATIONAL - Language is National (Hebrew/Arabic) and orientation is
           right-to-left.

         Example: SET STDDLGLANG=NATIONAL

   o  BIDIUI (For Hebrew ONLY). - configures the default text entry user
      interface for the session (See also, "Text Entry Interfaces" in the
      "Using Bidirectional Support" guide). Allowed values are:

        -  VISUAL - Default text entry interface is Visual.
        -  IMPLICIT - Default text entry interface is Implicit.
        -  CONTEXT - Default text entry interface is defined by Context (i.e,
           defined by the type of text of the etnry field - Entry fields with
           Visual text type will have Visual user interface by default and
           entry fields with Implicit text type will have Implicit user
           interface by default).

         Example: SET BIDIUI=VISUAL


ΓòÉΓòÉΓòÉ 12. Building Bidirectional Programs ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ 12.1. Include files ΓòÉΓòÉΓòÉ

To be able to use the bidirectional support two include files should be added
to your INCLUDE path. They are:

   o  layout.h - This file defines the basic structures as well as the bidi
      text conversion APIs.

   o  pmbidi.h - This file is PM-related, and it contains all the definitions
      and API prototypes for writing a PM bidirectional program.


ΓòÉΓòÉΓòÉ 12.2. How to use/link the Bidi APIs? ΓòÉΓòÉΓòÉ

All the bidirectional functions are contained in the executable file
PMBIDI.DLL. In order to dynamically link your application with PMBIDI.DLL, you
have to use the import library PMBIDI.LIB, which is included in this toolkit.


ΓòÉΓòÉΓòÉ 12.3. Sample Applications ΓòÉΓòÉΓòÉ

Several sample applications are provided with source to demonstrate the use of
the bidirectional functions.


ΓòÉΓòÉΓòÉ 12.3.1. Style ΓòÉΓòÉΓòÉ

This sample program demonstrates the use of the Bidi APIs from a Bidi-Aware
application.

It demonstrates the main techniques that are used by a bidi-aware PM
application and integrates the information that is included in this guide.

To start the sample program do the following:

   o  Read the README file for a description of the bidi "tasks" that are
      handled by this sample.

   o  Run RUNSAMP.CMD or RUNSAMP1.CMD to activate the sample program.


ΓòÉΓòÉΓòÉ 12.3.2. Telephone directory ΓòÉΓòÉΓòÉ

This is a simple telephone directory application that demonstrates how to use
the bidirectional functions to create applications with a bilingual
(National/English) user interface.

To activate the sample run 'TELDIR'.


ΓòÉΓòÉΓòÉ 13. Data Types ΓòÉΓòÉΓòÉ

This section describes the data types that are used in the Bidi functions.
These are in the C language.  For a description of a particular data type,
select the + on the Contents to view a list of data types, then select the data
type from that list.

Implicit Pointer Data Types

 Data type names beginning with "P" (for example, PERRORCODE) is likely to be a
pointer to another data type (in this instance, ERRORCODE).

In the data type summary, (provided by selecting the + in front of Data Types
on the Contents), no explicit "typedefs" are shown for pointers. Therefore, if
no data type definition can be found in the summary for a data type name
"Pxxxxxx", it becomes a pointer to the data type "xxxxxx", for which a
definition should be found in the summary.

The implicit type definition needed for such a pointer "Pxxxxxx" is:

typedef xxxxxx *Pxxxxxx;

Such definitions are provided by means of the system header file OS2.H.

Storage Mapping of Data Types

The storage mapping of the data types is dependent on the machine architecture.
To be portable, applications must access the data types using the definitions
supplied for that environment.


ΓòÉΓòÉΓòÉ 13.1. BD_ATTR_MASK ΓòÉΓòÉΓòÉ

BD_ATTR_MASK Bidi attribute mask structure.

typedef struct  _BD_ATTR_MASK {
ULONG    ulBd_Attr;       /* Bidi attributes */
ULONG    ulBd_Mask;       /* Bidi attribute mask */
 } BD_ATTR_MASK;


ΓòÉΓòÉΓòÉ <hidden> ulBD_Attr ΓòÉΓòÉΓòÉ

 ulBD_Attr (ULONG)
    Bidi attributes.

    Contains the BIDIATTR values.


ΓòÉΓòÉΓòÉ <hidden> ulBD_Mask ΓòÉΓòÉΓòÉ

 ulBD_Mask (ULONG)
    Bidi attribute mask.

    Contains the BIDIATTRM values.


ΓòÉΓòÉΓòÉ <hidden> BDA_TEXT_ORIENT_CONTEXT ΓòÉΓòÉΓòÉ

 #define BDA_TEXT_ORIENT_CONTEXT     0x00020000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_LEVEL ΓòÉΓòÉΓòÉ

 #define BDA_LEVEL                   0x30000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_INIT ΓòÉΓòÉΓòÉ

 #define BDA_INIT                    0x80000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_DATATYPE_VISUAL ΓòÉΓòÉΓòÉ

 #define BDA_DATATYPE_VISUAL        0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_DATATYPE_IMPLICIT ΓòÉΓòÉΓòÉ

 #define BDA_DATATYPE_IMPLICIT      0x01000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_TEXT_ORIENT_LTR ΓòÉΓòÉΓòÉ

 #define BDA_TEXT_ORIENT_LTR        0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_TEXT_ORIENT_RTL ΓòÉΓòÉΓòÉ

 #define BDA_TEXT_ORIENT_RTL        0x00010000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_TEXT_ORIENT_DYNAMIC ΓòÉΓòÉΓòÉ

 #define BDA_TEXT_ORIENT_DYNAMIC    0x00020000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_WND_ORIENT_LTR ΓòÉΓòÉΓòÉ

 #define BDA_WND_ORIENT_LTR         0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_WND_ORIENT_RTL ΓòÉΓòÉΓòÉ

 #define BDA_WND_ORIENT_RTL         0x00100000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_NUMERALS_ARABIC ΓòÉΓòÉΓòÉ

 #define BDA_NUMERALS_ARABIC        0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_NUMERALS_PASSTHRU ΓòÉΓòÉΓòÉ

 #define BDA_NUMERALS_PASSTHRU      0x00001000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_NUMERALS_HINDI ΓòÉΓòÉΓòÉ

 #define BDA_NUMERALS_HINDI         0x00002000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_NUMERALS_CONTEXT ΓòÉΓòÉΓòÉ

 #define BDA_NUMERALS_CONTEXT       0x00003000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_WORDBREAK_OFF ΓòÉΓòÉΓòÉ

 #define BDA_WORDBREAK_OFF          0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_WORDBREAK_ON ΓòÉΓòÉΓòÉ

 #define BDA_WORDBREAK_ON           0x00000200UL


ΓòÉΓòÉΓòÉ <hidden> BDA_SYM_SWAP_OFF ΓòÉΓòÉΓòÉ

 #define BDA_SYM_SWAP_OFF           0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_SYM_SWAP_ON ΓòÉΓòÉΓòÉ

 #define BDA_SYM_SWAP_ON            0x00000100UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_ON ΓòÉΓòÉΓòÉ

 #define BDA_CSD_ON                 0x00000000UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_PASSTHRU ΓòÉΓòÉΓòÉ

 #define BDA_CSD_PASSTHRU           0x00000001UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_BASE ΓòÉΓòÉΓòÉ

 #define BDA_CSD_BASE               0x00000010UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_INITIAL ΓòÉΓòÉΓòÉ

 #define BDA_CSD_INITIAL            0x00000011UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_MIDDLE ΓòÉΓòÉΓòÉ

 #define BDA_CSD_MIDDLE             0x00000012UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_FINAL ΓòÉΓòÉΓòÉ

 #define BDA_CSD_FINAL              0x00000013UL


ΓòÉΓòÉΓòÉ <hidden> BDA_CSD_ISOLATED ΓòÉΓòÉΓòÉ

 #define BDA_CSD_ISOLATED           0x00000014UL


ΓòÉΓòÉΓòÉ 13.2. BIDIATTR ΓòÉΓòÉΓòÉ

The BIDIATTR is a 32-bit word that determines all the aspects of Bidi
attributes related processing and window display associated with a specific
application. The user controls the behavior of different applications (having
different types of Bidi text) by manipulating these.

The following is the Bidi attributes structure:

--------------------------------------------------------------------------
BYTE     BIT         EXPLANATION                  VALUE
--------------------------------------------------------------------------
BYTE 3  Bit 7      Initialized            BDA_INIT (PM ONLY)

        Bit 4-6    level                  BDA_LEVEL
        Bit 0-3    Type of support        BDA_DATATYPE_VISUAL
                                          BDA_DATATYPE_IMPLICIT



BYTE 2  Bit 0-1    Orientation(text)      BDA_TEXT_ORIENT_LTR
                                          BDA_TEXT_ORIENT_RTL
                                          BDA_TEXT_ORIENT_DYNAMIC (PM ONLY)
                                          BDA_TEXT_ORIENT_CONTEXT (PM ONLY)
        Bit 2-3    Reserved               (must be zero)
        Bit 4      Window Orientation     BDA_WND_ORIENT_LTR
                                          BDA_WND_ORIENT_RTL

        Bit 5-7    Reserved               (must be zero)

BYTE 1  Bit 4-7    Numeral Shapes         BDA_NUMERALS_ARABIC
                                          BDA_NUMERALS_PASSTHRU
                                          BDA_NUMERALS_HINDI
                                          BDA_NUMERALS_CONTEXT (PM ONLY)
        Bit 2-3    Reserved               (must be zero)
        Bit 1      Word Break mode        BDA_WORDBREAK_OFF (PM ONLY)
                                          BDA_WORDBREAK_ON (PM ONLY)
        Bit 0      Symmetric Swapping     BDA_SYM_SWAP_OFF (PM ONLY)
                                          BDA_SYM_SWAP_ON (PM ONLY)

BYTE 0  Character Shape Determination     BDA_CSD_ON
                                          BDA_CSD_PASSTHRU
                                          BDA_CSD_BASE
                                          BDA_CSD_INITIAL
                                          BDA_CSD_MIDDLE
                                          BDA_CSD_FINAL
                                          BDA_CSD_ISOLATED


ΓòÉΓòÉΓòÉ 13.3. BIDIATTRM ΓòÉΓòÉΓòÉ

The BIDIATTRM contains a value that determines which attribute(s) will be
changed and which ones are masked.

The following are possible Bidi attribute mask values:

#define BDAM_INIT               0x80000000UL
#define BDAM_LEVEL              0x70000000UL
#define BDAM_WORD_BREAK         0x00000200UL
#define BDAM_DATATYPE           0x01000000UL
#define BDAM_TEXT_ORIENTATION   0x00030000UL
#define BDAM_WND_ORIENTATION    0x00100000UL
#define BDAM_NUMERALS           0x00003000UL
#define BDAM_SYM_SWAP           0x00000100UL
#define BDAM_CSD                0x000000FFUL

#define BDAM_ALL               (BDAM_DATATYPE         |
                                BDAM_TEXT_ORIENTATION |
                                BDAM_WND_ORIENTATION  |
                                BDAM_NUMERALS         |
                                BDAM_SYM_SWAP         |
                                BDAM_CSD               )


ΓòÉΓòÉΓòÉ 13.4. BIDIPARAM ΓòÉΓòÉΓòÉ

The BIDIPARAM keyword can be used to initially set the Bidirectional attributes
(see BIDIATTR) during window creation time. The usage of BIDIPARAM is analogous
to that of the PRESPARAMS keyword.

Values defined by BIDIPARAM will override any inherited attributes at window
creation time. However, it is important to note that the BIDIPARAM cannot be
used to dynamicaly set the Bidirectional attributes after creation. Dynamic
setting of the Bidirectional should be done using the PM Bidirectional window
functions.

#define PP_BDATTR_FIRST            0x100L  /* First BidiAttr PresParam  */
                                           /*                           */
#define PP_BDATTR_ALL              0x101L  /* Set ALL Bidi attrs        */
                                           /*                           */
#define PP_BDATTR_TEXTTYPE         0x102L  /* Text/Data type            */
#define PP_BDATTR_TEXT_ORIENTATION 0x103L  /* Text Orientation          */
#define PP_BDATTR_WND_ORIENTATION  0x104L  /* Window Orientation        */
#define PP_BDATTR_NUMERALS         0x105L  /* Arabic/Hindi Numerals     */
#define PP_BDATTR_SYM_SWAP         0x106L  /* Symetric Swapping         */
#define PP_BDATTR_WORD_BREAK       0x107L  /* Word break                */
#define PP_BDATTR_TEXT_SHAPE       0x108L  /* Text Shape Determination  */
                                           /*                           */
#define PP_BDATTR_LAST             0x108L  /* Last BidiAttr PresParam   */
                                           /*                           */
#define PP_BDSTATUS                0x110L  /* Bidirectional status flags*/


ΓòÉΓòÉΓòÉ <hidden> BDS_FAUTOPUSH_RTL_ON ΓòÉΓòÉΓòÉ

#define BDS_FAUTOPUSH_RTL_ON            0x00000001UL


ΓòÉΓòÉΓòÉ <hidden> BDS_FAUTOPUSH_LTR_ON ΓòÉΓòÉΓòÉ

#define BDS_FAUTOPUSH_LTR_ON            0x00000002UL


ΓòÉΓòÉΓòÉ <hidden> BDS_FPUSH_ON ΓòÉΓòÉΓòÉ

#define BDS_FPUSH_ON                    0x00000004UL


ΓòÉΓòÉΓòÉ <hidden> BDS_FKBD_LAYER_IS_NL ΓòÉΓòÉΓòÉ

#define BDS_FKBD_LAYER_IS_NL            0x00000010UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_FIELD_REV ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_FIELD_REV            0x00200000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_ENG_LAYER ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_ENG_LAYER            0x00010000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_NAT_LAYER ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_NAT_LAYER            0x00020000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_PUSH ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_PUSH                 0x00040000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_END_PUSH ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_END_PUSH             0x00080000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_AUTO_PUSH ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_AUTO_PUSH            0x00100000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_SCREEN_REV ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_SCREEN_REV           0x00400000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_BIDI_POPUP ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_BIDI_POPUP           0x02000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_AUTOMATIC ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_AUTOMATIC            0x04000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_INITIAL ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_INITIAL              0x08000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_MIDDLE ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_MIDDLE               0x10000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_FINAL ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_FINAL                0x20000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_ISOLATED ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_ISOLATED             0x40000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_ISOLATED ΓòÉΓòÉΓòÉ

#define BDS_HKFLAG_PASSTHRU             0x80000000UL


ΓòÉΓòÉΓòÉ <hidden> BDS_HKFLAG_ISOLATED ΓòÉΓòÉΓòÉ

#define BDS_DISABLE_INPUT_PROCESSING    0x00000020UL


ΓòÉΓòÉΓòÉ 13.5. BIDISTAT ΓòÉΓòÉΓòÉ

The BIDISTAT is a 32-bit word that determines all the aspects of Bidi status
related processing and window display associated with a specific application.
The user controls the behavior of different applications (having different
types of Bidi text) by manipulating these.

The following is the Bidi status structure:

Bits 16-31 : Hot Key Enable/Disable Flags

Bit 31          Passthru shape hot key                    BDS_HKFLAG_PASSTHRU
Bit 30          Isolated shape hot key                    BDS_HKFLAG_ISOLATED
Bit 29          Final shapes hot key                      BDS_HKFLAG_FINAL
Bit 28          Middle shapes hot key                     BDS_HKFLAG_MIDDLE
Bit 27          Initial shapes hot key                    BDS_HKFLAG_INITIAL
Bit 26          Automatic/base shapes hot key             BDS_HKFLAG_AUTOMATIC
Bit 25          Bidi viewer invocation hot key            BDS_HKFLAG_BIDI_POPUP
Bit 24          RESERVED                                  (must be zero)
Bit 23          RESERVED                                  (must be zero)
Bit 22          Window reverse hot key                    BDS_HKFLAG_SCREEN_REV
Bit 21          RESERVED                                  (must be zero)
Bit 20          Auto push hot key                         BDS_HKFLAG_AUTO_PUSH
Bit 19          End  push hot key                         BDS_HKFLAG_END_PUSH
Bit 18          Start push hot key                        BDS_HKFLAG_PUSH
Bit 17          Keyboard National layer hot key           BDS_HKFLAG_NAT_LAYER
Bit 16          Keyboard English layer hot key            BDS_HKFLAG_ENG_LAYER

Bits 0-15 : Bidi Flags

Bit 8-15        Reserved                                  (must be zero)
Bit 7           Refresh flag (refresh PVB in full screen) BDS_HKFLAG_FIELD_REV
Bit 6           Reserved                                  (must be zero)
Bit 5           Disable input processing                  BDS_DISABLE_INPUT_PROCESSING
Bit 4           Reserved                                  (must be zero)
Bit 2-3         Push state ON/OFF                         BDS_FPUSH_ON
Bit 1           Autopush ON/OFF in LtR window             BDS_FAUTOPUSH_LTR_ON
Bit 0           Autopush ON/OFF in RtL window             BDS_FAUTOPUSH_RTL_ON


ΓòÉΓòÉΓòÉ 13.6. BIDISTATM ΓòÉΓòÉΓòÉ

The BIDISTATM contains a value that determines which status will be changed and
which ones are masked.

The following are possible Bidi status mask values:

#define BDSM_HKFLAGS                    0x7E7F0000UL
#define BDSM_AUTOPUSH_RTL               0x00000001UL
#define BDSM_AUTOPUSH_LTR               0x00000002UL
#define BDSM_PUSH_ON                    0x00000004UL
#define BDSM_DISABLE_INPUT_PROCESSING   0x00000020UL

#define BDSM_ALL                      ( BDSM_HKFLAGS        |
                                        BDSM_AUTOPUSH_RTL   |
                                        BDSM_AUTOPUSH_LTR   |
                                        BDSM_PUSH_ON        |
                                        BDSM_DISABLE_INPUT_PROCESSING )


ΓòÉΓòÉΓòÉ <hidden> BOOL ΓòÉΓòÉΓòÉ

BOOL Boolean.

Valid values are FALSE, which is 0, and TRUE, which is 1.

typedef unsigned long BOOL;


ΓòÉΓòÉΓòÉ <hidden> CDATE ΓòÉΓòÉΓòÉ

CDATE Structure that contains date information for a data element in the
details view of a container control.

typedef struct _CDATE {
UCHAR     day;    /* Day  */
UCHAR     month;  /* Month  */
USHORT    year;   /* Year  */
 } CDATE;


ΓòÉΓòÉΓòÉ <hidden> day ΓòÉΓòÉΓòÉ

 day (UCHAR)
    Day.


ΓòÉΓòÉΓòÉ <hidden> month ΓòÉΓòÉΓòÉ

 month (UCHAR)
    Month.


ΓòÉΓòÉΓòÉ <hidden> year ΓòÉΓòÉΓòÉ

 year (USHORT)
    Year.


ΓòÉΓòÉΓòÉ <hidden> CHAR ΓòÉΓòÉΓòÉ

CHAR Single-byte character.

#define CHAR char


ΓòÉΓòÉΓòÉ <hidden> CNRINFO ΓòÉΓòÉΓòÉ

CNRINFO Structure that contains information about the container.

typedef struct _CNRINFO {
ULONG         cb;                  /* Structure size  */
PVOID         pSortRecord;         /* Pointer or NULL  */
PFIELDINFO    pFieldInfoLast;      /* Pointer or NULL  */
PFIELDINFO    pFieldInfoObject;    /* Pointer  */
PSZ           pszCnrTitle;         /* Title text or NULL  */
ULONG         flWindowAttr;        /* Window attributes  */
POINTL        ptlOrigin;           /* Workspace origin  */
ULONG         cDelta;              /* Threshold  */
ULONG         cRecords;            /* Number of records  */
SIZEL         slBitmapOrIcon;      /* Icon/bit-map size  */
SIZEL         slTreeBitmapOrIcon;  /* Icon/bit-map size  */
HBITMAP       hbmExpanded;         /* Bit-map handle  */
HBITMAP       hbmCollapsed;        /* Bit-map handle  */
HPOINTER      hptrExpanded;        /* Icon handle  */
HPOINTER      hptrCollapsed;       /* Icon handle  */
LONG          cyLineSpacing;       /* Vertical space  */
LONG          cxTreeIndent;        /* Horizontal space  */
LONG          cxTreeLine;          /* Line width  */
ULONG         cFields;             /* Number of columns  */
LONG          xVertSplitbar;       /* Split bar position  */
 } CNRINFO;


ΓòÉΓòÉΓòÉ <hidden> cb ΓòÉΓòÉΓòÉ

 cb (ULONG)
    Structure size.

    The size (in bytes) of the CNRINFO data structure.


ΓòÉΓòÉΓòÉ <hidden> pSortRecord ΓòÉΓòÉΓòÉ

 pSortRecord (PVOID)
    Pointer or NULL.

    Pointer to the comparison function for sorting container records. If NULL,
    which is the default condition, no sorting is performed. Sorting only
    occurs during record insertion and when changing the value of this field.
    The third parameter of the comparison function, pStorage, must be NULL. See
    CM_SORTRECORD for a further description of the comparison function.


ΓòÉΓòÉΓòÉ <hidden> pFieldInfoLast ΓòÉΓòÉΓòÉ

 pFieldInfoLast (PFIELDINFO)
    Pointer or NULL.

    Pointer to last column in the left window of the split details view. The
    default is NULL, causing all columns to be positioned in the left window.


ΓòÉΓòÉΓòÉ <hidden> pFieldInfoObject ΓòÉΓòÉΓòÉ

 pFieldInfoObject (PFIELDINFO)
    Pointer.

    Pointer to a column that represents an object in the details view. The data
    for this FIELDINFO structure must contain icons or bit maps. In-use
    emphasis is applied to this column of icons or bit maps only. The default
    is the leftmost column in the unsplit details view, or the leftmost column
    in the left window of the split details view.


ΓòÉΓòÉΓòÉ <hidden> pszCnrTitle ΓòÉΓòÉΓòÉ

 pszCnrTitle (PSZ)
    Title text or NULL.

    Text for the container title. The default is NULL.


ΓòÉΓòÉΓòÉ <hidden> flWindowAttr ΓòÉΓòÉΓòÉ

 flWindowAttr (ULONG)
    Window attributes.

    Consists of container window attributes.

   o  Specify one of the following container views, which determine the
      presentation format of items in a container:

           CV_ICON
              In the icon view, the container items are represented as
              icon/text or bit-map/text pairs, with text beneath the icons or
              bit maps. This is the default view. This view can be combined
              with the CV_MINI style bit by using an OR operator (|).
           CV_NAME
              In the name view, the container items are represented as
              icon/text or bit-map/text pairs, with text to the right of the
              icons or bit maps. This view can be combined with the CV_MINI and
              CV_FLOW style bits by using OR operators (|).
           CV_TEXT
              In the text view, the container items are displayed as a list of
              text strings. This view can be combined with the CV_FLOW style
              bit by using an OR operator (|).
           CV_TREE
              In the tree view, the container items are represented in a
              hierarchical manner. The tree view has three forms, which are
              defined in the following list. If you specify CV_TREE by itself,
              the tree icon view is used.

             -  Tree icon view
                The tree icon view is specified by using a logical OR operator
                to combine the tree view with the icon view (CV_TREE |
                CV_ICON). Container items in this view are represented as
                icon/text pairs or bit-map/text pairs, with text to the right
                of the icons or bit maps. Also, a collapsed or expanded icon or
                bit map is displayed to the left of parent items. If this icon
                or bit map is a collapsed icon or bit map, selecting it will
                cause the parent item to be expanded so that its child items
                are displayed below it. If this icon or bit map is an expanded
                icon or bit map, selecting it will cause the parent's child
                items to be removed from the display. The default collapsed and
                expanded bit maps provided by the container use a plus sign (+)
                and a minus sign (-), respectively, to indicate that items can
                be added to or subtracted from the display.

             -  Tree name view
                The tree name view is specified by using a logical OR operator
                to combine the tree view with the name view (CV_TREE |
                CV_NAME). Container items in this view are displayed as either
                icon/text pairs or bit-map/text pairs, with text to the right
                of the icons or bit maps. However, the indicator that
                represents whether an item can be collapsed or expanded, such
                as a plus or minus sign, is included in the icon or bit map
                that represents that item, not in a separate icon or bit map as
                in the tree icon and tree text views. The container control
                does not provide default collapsed and expanded bit maps for
                the tree name view.

             -  Tree text view
                The tree text view is specified by using a logical OR operator
                to combine the tree view with the text view (CV_TREE |
                CV_TEXT). Container items in this view are displayed as a list
                of text strings. As in the tree icon view, a collapsed or
                expanded icon or bit map is displayed to the left of parent
                items.
           CV_DETAIL
              In the details view, the container items are presented in
              columns. Each column can contain icons or bit maps, text,
              numbers, dates, or times.

   o  Specify one or both of the following view styles by using an OR operator
      (|) to combine them with the specified view. These view styles are
      optional.

           CV_MINI
              Produces a mini-icon whose size is based on the Presentation
              Manager (PM) SV_CYMENU system value to produce a device-dependent
              mini-icon.
              The CV_MINI view style bit is ignored when:

             -  The text view (CV_TEXT), tree view (CV_TREE), or details view
                (CV_DETAIL) are displayed

             -  The CCS_MINIRECORDCORE style bit is specified.
              If this style bit is not specified and the icon view (CV_ICON) or
              name view (CV_NAME) is used, the default, regular-sized icon is
              used. The size of regular-sized icons is based on the value in
              the slBitmapOrIcon field of the CNRINFO data structure. If this
              field is equal to 0, the PM SV_CXICON and SV_CYICON system values
              for width and height, respectively, are used. Icon sizes are
              consistent with PM-defined icon sizes for all devices.
           CV_FLOW
              Dynamically arranges container items in columns in the name and
              text views. These are called flowed name and flowed text views.
              If this style bit is set for the name view (CV_NAME) or text view
              (CV_TEXT), the container items are placed in a single column
              until the bottom of the client area is reached. The next
              container item is placed in the adjacent column to the right of
              the filled column. This process is repeated until all of the
              container items are positioned in the container. The width of
              each column is determined by the longest text string in that
              column. The size of the window determines the depth of the client
              area.
              If this style bit is not specified, the default condition for the
              name and text views is to vertically fill the container in a
              single column without flowing the container items. If this style
              bit is set for the icon view (CV_ICON) or details view
              (CV_DETAIL), it is ignored.

   o  Specify either of the following to indicate whether the container will
      display icons or bit maps:

           CA_DRAWICON
              Icons are used for the icon, name, tree, or details views. This
              is the default. This container attribute should be used with the
              hptrIcon and hptrMiniIcon fields of the RECORDCORE data
              structure.
           CA_DRAWBITMAP
              Bit maps are used for the icon, name, tree, or details views.
              This container attribute can be used with the hbmBitmap and
              hbmMiniBitmap fields of the RECORDCORE data structure.
              Notes

             1. If both the CA_DRAWICON and CA_DRAWBITMAP attributes are
                specified, the CA_DRAWICON attribute is used.

             2. If the CCS_MINIRECORDCORE style bit is specified when a
                container is created, the hptrIcon field of the MINIRECORDCORE
                data structure is used.

   o  Specify one of the following attributes to provide target emphasis for
      the name, text, and details views. If neither ordered nor mixed target
      emphasis is specified, the emphasis is drawn around the record.

           CA_ORDEREDTARGETEMPH
              Shows where a container record can be dropped during direct
              manipulation by drawing a line beneath the record. Ordered target
              emphasis does not apply to the icon and tree views.
           CA_MIXEDTARGETEMPH
              Shows where a container record can be dropped during direct
              manipulation either by drawing a line between two items or by
              drawing lines around the container record. Mixed target emphasis
              does not apply to the icon and tree views.

   o  Specify the following attribute to draw lines that show the relationship
      between items in the tree view.

           CA_TREELINE
              Shows the relationship between all items in the tree view.

   o  Specify the following to draw container records, paint the background of
      the container, or both:

           CA_OWNERDRAW
              Ownerdraw for the container, which allows the application to draw
              container records.
           CA_OWNERPAINTBACKGROUND
              Allows the application to subclass the container and paint the
              background. If specified, and the container is subclassed, the
              application receives the CM_PAINTBACKGROUND message in the
              subclass procedure. Otherwise, the container paints the
              background using the color specified by SYSCLR_WINDOW, which can
              be changed by using the PP_BACKGROUNDCOLOR or
              PP_BACKGROUNDCOLORINDEX presentation parameter in the
              WM_PRESPARAMCHANGED (in Container Controls) message.

   o  Specify the following if the container is to have a title:

           CA_CONTAINERTITLE
              Allows you to include a container title. The default is no
              container title.

   o  Specify one or both of the following container title attributes. These
      are valid only if the CA_CONTAINERTITLE attribute is specified.

           CA_TITLEREADONLY
              Prevents the container title from being edited directly. The
              default is to allow the container title to be edited.
           CA_TITLESEPARATOR
              Puts a separator line between the container title and the records
              beneath it. The default is no separator line.

   o  Specify one of the following to position the container title. These are
      valid only if the CA_CONTAINERTITLE attribute is specified.

           CA_TITLECENTER
              Centers the container title. This is the default.
           CA_TITLELEFT
              Left-justifies the container title.
           CA_TITLERIGHT
              Right-justifies the container title.

   o  Specify the following to display column headings in the details view:

           CA_DETAILSVIEWTITLES
              Allows you to include column headings in the details view. The
              default is no column headings.


ΓòÉΓòÉΓòÉ <hidden> ptlOrigin ΓòÉΓòÉΓòÉ

 ptlOrigin (POINTL)
    Workspace origin.

    Lower-left origin of the workspace in virtual coordinates, used in the icon
    view. The default origin is (0,0).


ΓòÉΓòÉΓòÉ <hidden> cDelta ΓòÉΓòÉΓòÉ

 cDelta (ULONG)
    Threshold

    An application-defined threshold, or number of records, from either end of
    the list of available records. Used when a container needs to handle large
    amounts of data. The default is 0. Refer to the OS/2 Programming Guide for
    more information about specifying deltas.


ΓòÉΓòÉΓòÉ <hidden> cRecords ΓòÉΓòÉΓòÉ

 cRecords (ULONG)
    Number of records.

    The number of records in the container. Initially this field is 0.


ΓòÉΓòÉΓòÉ <hidden> slBitmapOrIcon ΓòÉΓòÉΓòÉ

 slBitmapOrIcon (SIZEL)
    Icon/bit-map size.

    The size (in pels) of icons or bit maps. The default is the system size.


ΓòÉΓòÉΓòÉ <hidden> slTreeBitmapOrIcon ΓòÉΓòÉΓòÉ

 slTreeBitmapOrIcon (SIZEL)
    Icon/bit-map size.

    The size (in pels) of the expanded and collapsed icons or bit maps used in
    the tree icon and tree text views.


ΓòÉΓòÉΓòÉ <hidden> hbmExpanded ΓòÉΓòÉΓòÉ

 hbmExpanded (HBITMAP)
    Bit-map handle.

    The handle of the bit map to be used to represent an expanded parent item
    in the tree icon and tree text views. If neither an icon handle (see
    hptrExpanded) nor a bit-map handle is specified, a default bit map with a
    minus sign (-) is provided.


ΓòÉΓòÉΓòÉ <hidden> hbmCollapsed ΓòÉΓòÉΓòÉ

 hbmCollapsed (HBITMAP)
    Bit-map handle.

    The handle of the bit map to be used to represent a collapsed parent item
    in the tree icon and tree text views. If neither an icon handle (see
    hptrCollapsed) nor a bit-map handle is specified, a default bit map with a
    plus sign (+) is provided.


ΓòÉΓòÉΓòÉ <hidden> hptrExpanded ΓòÉΓòÉΓòÉ

 hptrExpanded (HPOINTER)
    Icon handle.

    The handle of the icon to be used to represent an expanded parent item in
    the tree icon and tree text views. If neither an icon handle nor a bit-map
    handle (see hbmExpanded) is specified, a default bit map with a minus sign
    (-) is provided.


ΓòÉΓòÉΓòÉ <hidden> hptrCollapsed ΓòÉΓòÉΓòÉ

 hptrCollapsed (HPOINTER)
    Icon handle.

    The handle of the icon to be used to represent a collapsed parent item in
    the tree icon and tree text views. If neither an icon handle nor a bit-map
    handle (see hbmCollapsed) is specified, a default bit map with a plus sign
    (+) is provided.


ΓòÉΓòÉΓòÉ <hidden> cyLineSpacing ΓòÉΓòÉΓòÉ

 cyLineSpacing (LONG)
    Vertical space.

    The amount of vertical space (in pels) between the records. If you specify
    a value that is less than 0, a default value is used.


ΓòÉΓòÉΓòÉ <hidden> cxTreeIndent ΓòÉΓòÉΓòÉ

 cxTreeIndent (LONG)
    Horizontal space.

    The amount of horizontal space (in pels) between levels in the tree view.
    If you specify a value that is less than 0, a default value is used.


ΓòÉΓòÉΓòÉ <hidden> cxTreeLine ΓòÉΓòÉΓòÉ

 cxTreeLine (LONG)
    Line width.

    The width of the lines (in pels) that show the relationship between tree
    items. If you specify a value that is less than 0, a default value is used.
    Also, if the CA_TREELINE container attribute of the flWindowAttr field is
    not specified, these lines are not drawn.


ΓòÉΓòÉΓòÉ <hidden> cFields ΓòÉΓòÉΓòÉ

 cFields (ULONG)
    Number of columns.

    The number of FIELDINFO structures in the container. Initially this field
    is 0.


ΓòÉΓòÉΓòÉ <hidden> xVertSplitbar ΓòÉΓòÉΓòÉ

 xVertSplitbar (LONG)
    Split bar position.

    The initial position of the split bar relative to the container, used in
    the details view. If this value is less than 0, the split bar is not used.
    The default value is negative one (-1).


ΓòÉΓòÉΓòÉ 13.7. LAYOUT_EDIT_SIZE ΓòÉΓòÉΓòÉ

LAYOUT_EDIT_SIZE Defines number of surrounding code elements that need to be
considered when performing edit shaping.

typedef struct  _LAYOUT_EDIT_SIZE {
ULONG    front;      /* Previous characters */
ULONG    back;       /* Succeeding characters */
 } LAYOUT_EDIT_SIZE;


ΓòÉΓòÉΓòÉ <hidden> front ΓòÉΓòÉΓòÉ

 front (ULONG)
    Previous characters.

    Number of code elements in front of the substring.


ΓòÉΓòÉΓòÉ <hidden> back ΓòÉΓòÉΓòÉ

 back (ULONG)
    Succeeding characters.

    Number of code elements behind the substring.


ΓòÉΓòÉΓòÉ <hidden> LAYOUT_OBJECT ΓòÉΓòÉΓòÉ

LAYOUT_OBJECT Bit-map handle.

typedef PVOID  LAYOUT_OBJECT;


ΓòÉΓòÉΓòÉ 13.8. LAYOUT_TEXT_DESCRIPTOR ΓòÉΓòÉΓòÉ

LAYOUT_TEXT_DESCRIPTOR Identifies the attributes of the source and target text.

typedef struct  _LAYOUT_TEXT_DESCRIPTOR {
ULONG    in;      /* Input buffer description */
ULONG    out;     /* Output description */
 } LAYOUT_TEXT_DESCRIPTOR;


ΓòÉΓòÉΓòÉ <hidden> front ΓòÉΓòÉΓòÉ

 in (ULONG)
    Input buffer description.

    Attributes that describe the input buffer.


ΓòÉΓòÉΓòÉ <hidden> back ΓòÉΓòÉΓòÉ

 out (ULONG)
    Output description.

    Attributes that describe the required ouput buffer.


ΓòÉΓòÉΓòÉ 13.9. LAYOUT_VALUES ΓòÉΓòÉΓòÉ

LAYOUT_VALUES Layout object default values.

These values are automatically associated with the layout object at creation
time.

typedef struct  _LAYOUT_VALUES {
ULONG    name;        /* Name of Layout Value Item */
PVOID    value;       /* Data of Layout Value Item */
 } LAYOUT_VALUES;


ΓòÉΓòÉΓòÉ <hidden> name ΓòÉΓòÉΓòÉ

 name (ULONG)
    Name of Layout Value Item.

    The following are possible names:

    For a more detailed explaination please refer to the section on Layout
    Values .

             Value Name                Value Type             Set/Get
             ___________               ___________             _____
         ActiveBidirection         BOOL                      G
         ActiveShapeEditing        BOOL                      G
         ShapeContextSize          LAYOUT_EDIT_SIZE          G
         Cellsize                  ULONG                    SG
         InputMode                 BOOL                     SG
         CallerAllocMem            BOOL                     SG
         QueryValueSize            ULONG                    SG
         InOutTextDescrMask        ULONG                    SG
         InOnlyTextDescr           ULONG                    SG
         OutOnlyTextDescr          ULONG                    SG
         Orientation               LAYOUT_TEXT_DESCRIPTOR   SG
         TypeOfText                LAYOUT_TEXT_DESCRIPTOR   SG
         Swapping                  LAYOUT_TEXT_DESCRIPTOR   SG
         Numerals                  LAYOUT_TEXT_DESCRIPTOR   SG
         TextShaping               LAYOUT_TEXT_DESCRIPTOR   SG
         WordBreak                 LAYOUT_TEXT_DESCRIPTOR   SG

    All of the above can be ORed together except the following.

         ActiveShapeEditing
         ActiveBidirection
         ShapeContextSize

         CellSize
         InputMode
         InOnlyTextDescr
         OutOnlyTextDescr
         InOutTextDescrMask
         CallerAllocMem


ΓòÉΓòÉΓòÉ <hidden> value ΓòÉΓòÉΓòÉ

 value (PVOID)
    Data of Layout Value Item.

 Each value element of a LAYOUT_VALUES record must contain a pointer to the
 type of the layout value that is being set or get. That is, if the layout
 value is for type T, the arguement must be of type T*.


ΓòÉΓòÉΓòÉ <hidden> ActiveBidirection ΓòÉΓòÉΓòÉ

 #define ActiveBidirection       (0x0002<<16)


ΓòÉΓòÉΓòÉ <hidden> ActiveShapeEditing ΓòÉΓòÉΓòÉ

 #define ActiveShapeEditing      (0x0001<<16)


ΓòÉΓòÉΓòÉ <hidden> ShapeContextSize ΓòÉΓòÉΓòÉ

 #define ShapeContextSize        (0x0005<<16)


ΓòÉΓòÉΓòÉ <hidden> CellSize ΓòÉΓòÉΓòÉ

 #define CellSize                (0x0006<<16)


ΓòÉΓòÉΓòÉ <hidden> InputMode ΓòÉΓòÉΓòÉ

 #define InputMode               (0x0007<<16)


ΓòÉΓòÉΓòÉ <hidden> CallerAllocMem ΓòÉΓòÉΓòÉ

 #define CallerAllocMem          (0x000b<<16)


ΓòÉΓòÉΓòÉ <hidden> QueryValueSize ΓòÉΓòÉΓòÉ

 #define QueryValueSize          (0x8000<<16)


ΓòÉΓòÉΓòÉ <hidden> InOutTextDescrMask ΓòÉΓòÉΓòÉ

 #define InOutTextDescrMask      (0x000a<<16)


ΓòÉΓòÉΓòÉ <hidden> InOnlyTextDescr ΓòÉΓòÉΓòÉ

 #define InOnlyTextDescr         (0x0008<<16)


ΓòÉΓòÉΓòÉ <hidden> OutOnlyTextDescr ΓòÉΓòÉΓòÉ

 #define OutOnlyTextDescr        (0x0009<<16)


ΓòÉΓòÉΓòÉ <hidden> Orientation ΓòÉΓòÉΓòÉ

 #define Orientation             0x00000001


ΓòÉΓòÉΓòÉ <hidden> TypeOfText ΓòÉΓòÉΓòÉ

 #define TypeOfText              0x00000002


ΓòÉΓòÉΓòÉ <hidden> Swapping ΓòÉΓòÉΓòÉ

 #define Swapping                0x00000004


ΓòÉΓòÉΓòÉ <hidden> Numerals ΓòÉΓòÉΓòÉ

 #define Numerals                0x00000008


ΓòÉΓòÉΓòÉ <hidden> TextShaping ΓòÉΓòÉΓòÉ

 #define TextShaping             0x00000010


ΓòÉΓòÉΓòÉ <hidden> Word_Break ΓòÉΓòÉΓòÉ

 #define Word_Break              0x00000080


ΓòÉΓòÉΓòÉ <hidden> QueryValueSize ΓòÉΓòÉΓòÉ

#define QueryValueSize          (0x8000<<16)


ΓòÉΓòÉΓòÉ <hidden> PLAYOUT_OBJECT ΓòÉΓòÉΓòÉ

PLAYOUT_OBJECT Bit-map handle.

typedef PVOID  FAR *  PLAYOUT_OBJECT;


ΓòÉΓòÉΓòÉ <hidden> PLAYOUT_VALUES ΓòÉΓòÉΓòÉ

PLAYOUT_VALUES Bit-map handle.

typedef LAYOUT_VALUES FAR *  PLAYOUT_VALUES;


ΓòÉΓòÉΓòÉ <hidden> CTIME ΓòÉΓòÉΓòÉ

CTIME Structure that contains time information for a data element in the
details view of a container control.

typedef struct _CTIME {
UCHAR    hours;       /* Hour  */
UCHAR    minutes;     /* Minute  */
UCHAR    seconds;     /* Second  */
UCHAR    ucReserved;  /* Reserved  */
 } CTIME;


ΓòÉΓòÉΓòÉ <hidden> hours ΓòÉΓòÉΓòÉ

 hours (UCHAR)
    Hour.


ΓòÉΓòÉΓòÉ <hidden> minutes ΓòÉΓòÉΓòÉ

 minutes (UCHAR)
    Minute.


ΓòÉΓòÉΓòÉ <hidden> seconds ΓòÉΓòÉΓòÉ

 seconds (UCHAR)
    Second.


ΓòÉΓòÉΓòÉ <hidden> ucReserved ΓòÉΓòÉΓòÉ

 ucReserved (UCHAR)
    Reserved.


ΓòÉΓòÉΓòÉ <hidden> FIELDINFO ΓòÉΓòÉΓòÉ

FIELDINFO Structure that contains information about column data in the details
view of the container control. The details view displays each FIELDINFO
structure as a column of data that contains specific information about each
container record. For example, one FIELDINFO structure, or column, might
contain icons or bit maps that represent each container record. Another
FIELDINFO structure might contain the date or time that each container record
was created.

typedef struct _FIELDINFO {
ULONG         cb;              /* Structure size  */
ULONG         flData;          /* Data attributes  */
ULONG         flTitle;         /* Attributes of column headings  */
PVOID         pTitleData;      /* Column heading data  */
ULONG         offStruct;       /* Structure offset  */
PVOID         pUserData;       /* Pointer  */
PFIELDINFO    pNextFieldInfo;  /* Pointer  */
ULONG         cxWidth;         /* Column width  */
 } FIELDINFO;


ΓòÉΓòÉΓòÉ <hidden> cb ΓòÉΓòÉΓòÉ

 cb (ULONG)
    Structure size.

    The size (in bytes) of the FIELDINFO structure.


ΓòÉΓòÉΓòÉ <hidden> flData ΓòÉΓòÉΓòÉ

 flData (ULONG)
    Data attributes.

    Attributes of the data in a field.

   o  Specify one of the following for each column to choose the type of data
      that is displayed in each column:

           CFA_BITMAPORICON
              The column contains bit-map or icon data.
           CFA_STRING
              Character or text data is displayed in this column.
           CFA_ULONG
              Unsigned number data is displayed in this column. National
              Language Support (NLS) is enabled for number format.
           CFA_DATE
              The data in the column is displayed in date format. National
              Language Support (NLS) is enabled for date format. Use the data
              structure described in CDATE.
           CFA_TIME
              The data in the column is displayed in time format. National
              Language Support (NLS) is enabled for time format. Use the data
              structure described in CTIME.

   o  Specify any or all of the following column attributes:

           CFA_HORZSEPARATOR
              A horizontal separator is provided beneath column headings.
           CFA_SEPARATOR
              A vertical separator is drawn after this column.
           CFA_OWNER
              Ownerdraw is enabled for this container column.
           CFA_INVISIBLE
              Invisible container column. The default is visible.
           CFA_FIREADONLY
              Prevents text in a FIELDINFO data structure (text in a column)
              from being edited directly. This attribute applies only to
              columns for which the CFA_STRING attribute has been specified.

   o  Specify one of the following for each column to vertically position data
      in that column:

           CFA_TOP
              Top-justifies field data.
           CFA_BOTTOM
              Bottom-justifies field data.
           CFA_VCENTER
              Vertically centers field data. This is the default.

   o  Specify one of the following for each column to horizontally position
      data in that column. These attributes can be combined with the attributes
      used for vertical positioning of column data by using an OR operator (|).

           CFA_CENTER
              Horizontally centers field data.
           CFA_LEFT
              Left-justifies field data. This is the default.
           CFA_RIGHT
              Right-justifies field data.


ΓòÉΓòÉΓòÉ <hidden> flTitle ΓòÉΓòÉΓòÉ

 flTitle (ULONG)
    Attributes of column headings.

   o  Specify the following if icon or bit-map data is to be displayed in the
      column heading:

           CFA_BITMAPORICON
              The column heading contains icon or bit-map data. If
              CFA_BITMAPORICON is not specified, any data that is assigned to
              the column heading is assumed to be text or character data.

   o  Specify the following to prevent direct editing of a column heading:

           CFA_FITITLEREADONLY
              Prevents a column heading from being edited directly.

   o  Specify one of the following for each column heading to vertically
      position data in that column heading:

           CFA_TOP
              Top-justifies column headings.
           CFA_BOTTOM
              Bottom-justifies column headings.
           CFA_VCENTER
              Vertically centers column headings. This is the default.

   o  Specify one of the following for each column heading to horizontally
      position data in that column heading. These attributes can be combined
      with the attributes used for vertical positioning of column heading data
      by using an OR operator (|).

           CFA_CENTER
              Horizontally centers column headings.
           CFA_LEFT
              Left-justifies column headings. This is the default.
           CFA_RIGHT
              Right-justifies column headings.


ΓòÉΓòÉΓòÉ <hidden> pTitleData ΓòÉΓòÉΓòÉ

 pTitleData (PVOID)
    Column heading data.

    Column heading data, which can be a text string, or an icon or bit map. The
    default is a text string. If the flTitle field is set to the
    CFA_BITMAPORICON attribute, this must be an icon or bit map.


ΓòÉΓòÉΓòÉ <hidden> offStruct ΓòÉΓòÉΓòÉ

 offStruct (ULONG)
    Structure offset.

    Offset from the beginning of a RECORDCORE structure to the data that is
    displayed in this column.

    Note:   If the CCS_MINIRECORDCORE style bit is specified when a container
    is created, then MINIRECORDCORE should be used instead of RECORDCORE and
    PMINIRECORDCORE should be used instead of PRECORDCORE in all applicable
    data structures and messages.


ΓòÉΓòÉΓòÉ <hidden> pUserData ΓòÉΓòÉΓòÉ

 pUserData (PVOID)
    Pointer.

    Pointer to user data.


ΓòÉΓòÉΓòÉ <hidden> pNextFieldInfo ΓòÉΓòÉΓòÉ

 pNextFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the next linked FIELDINFO data structure.


ΓòÉΓòÉΓòÉ <hidden> cxWidth ΓòÉΓòÉΓòÉ

 cxWidth (ULONG)
    Column width.

    Used to specify the width of a column. The default is an automatically
    sized column that is always the width of its widest element. If this field
    is set and the data is too wide, the data is truncated.


ΓòÉΓòÉΓòÉ <hidden> ulFlags ΓòÉΓòÉΓòÉ

 ulFlags (ULONG)
    FNTF_* flags.

      FNTF_NOVIEWPRINTERFONTS
         This flag is initialized only when both hpsScreen and hpsPrinter are
         not NULLHANDLE. On input, this parameter determines whether the
         printer fonts are to be included in the font list box. The user
         controls this with a check box.
      FNTF_NOVIEWSCREENFONTS
         This flag is initialized only when both hpsScreen and hpsPrinter are
         not NULLHANDLE. On input, this parameter determines whether the screen
         fonts should be included in the font list box. The user controls this
         with a check box.
      FNTF_PRINTERFONTSELECTED
         This determines if a printer-specific font is selected by the user.
         The application should make an approximation of this printer font when
         outputting to the screen. This is an output-only flag and is ignored
         on input.
      FNTF_SCREENFONTSELECTED
         This determines if a screen-specific font is selected by the user. The
         application should make an approximation of this screen font when
         outputting to the screen. This is an output-only flag and is ignored
         on input.


ΓòÉΓòÉΓòÉ <hidden> HBITMAP ΓòÉΓòÉΓòÉ

HBITMAP Bit-map handle.

typedef LHANDLE HBITMAP;


ΓòÉΓòÉΓòÉ <hidden> HWND ΓòÉΓòÉΓòÉ

HWND Window handle.

typedef LHANDLE HWND;


ΓòÉΓòÉΓòÉ <hidden> HFILE ΓòÉΓòÉΓòÉ

HFILE Resource handle.

typedef LHANDLE HFILE;


ΓòÉΓòÉΓòÉ <hidden> HPOINTER ΓòÉΓòÉΓòÉ

HPOINTER Pointer handle.

typedef LHANDLE HPOINTER;


ΓòÉΓòÉΓòÉ <hidden> LONG ΓòÉΓòÉΓòÉ

LONG Signed integer in the range -2 147 483 648 through 2 147 483 647.

Note:   Where this data type represents a graphic coordinate in world or model
        space, its value is restricted to -134 217 728 through 134 217 727.

A graphic coordinate in device or screen coordinates is restricted to -32 768
through 32 767.

The value of a graphic coordinate may be further restricted by any transforms
currently in force, including the positioning of the origin of the window on
the screen. In particular, coordinates in world or model space must not
generate coordinate values after transformation (that is, in device or screen
space) outside the range -32 768 through 32 767.

  #define LONG long


ΓòÉΓòÉΓòÉ <hidden> MINIRECORDCORE ΓòÉΓòÉΓòÉ

MINIRECORDCORE Structure that contains information for smaller records than
those defined by the RECORDCORE data structure. This data structure is used if
the CCS_MINIRECORDCORE style bit is specified when a container is created.

typedef struct _MINIRECORDCORE {
ULONG              cb;               /* Structure size  */
ULONG              flRecordAttr;     /* Attributes of container records  */
POINTL             ptlIcon;          /* Record position  */
PMINIRECORDCORE    preccNextRecord;  /* Pointer  */
PSZ                pszIcon;          /* Record text  */
HPOINTER           hptrIcon;         /* Record icon  */
 } MINIRECORDCORE;


ΓòÉΓòÉΓòÉ <hidden> cb ΓòÉΓòÉΓòÉ

 cb (ULONG)
    Structure size.

    The size (in bytes) of the MINIRECORDCORE structure.


ΓòÉΓòÉΓòÉ <hidden> flRecordAttr ΓòÉΓòÉΓòÉ

 flRecordAttr (ULONG)
    Attributes of container records.

    Contains any or all of the following:

      CRA_COLLAPSED
         Specifies that a record is collapsed.
      CRA_CURSORED
         Specifies that a record will be drawn with a selection cursor.
      CRA_DROPONABLE
         Specifies that a record can be a target for direct manipulation.
      CRA_EXPANDED
         Specifies that a record is expanded.
      CRA_FILTERED
         Specifies that a record is filtered, and therefore hidden from view.
      CRA_INUSE
         Specifies that a record will be drawn with in-use emphasis.
      CRA_RECORDREADONLY
         Prevents a record from being edited directly.
      CRA_SELECTED
         Specifies that a record will be drawn with selected-state emphasis.
      CRA_TARGET
         Specifies that a record will be drawn with target emphasis.


ΓòÉΓòÉΓòÉ <hidden> ptlIcon ΓòÉΓòÉΓòÉ

 ptlIcon (POINTL)
    Record position.

    Position of a container record in the icon view.


ΓòÉΓòÉΓòÉ <hidden> preccNextRecord ΓòÉΓòÉΓòÉ

 preccNextRecord (PMINIRECORDCORE)
    Pointer.

    Pointer to the next linked record.


ΓòÉΓòÉΓòÉ <hidden> pszIcon ΓòÉΓòÉΓòÉ

 pszIcon (PSZ)
    Record text.

    Text for the container record.


ΓòÉΓòÉΓòÉ <hidden> hptrIcon ΓòÉΓòÉΓòÉ

 hptrIcon (HPOINTER)
    Record icon.

    Icon that is displayed for the container record.


ΓòÉΓòÉΓòÉ <hidden> MLE_SEARCHDATA ΓòÉΓòÉΓòÉ

MLE_SEARCHDATA Search structure for multiline entry field.

typedef struct _SEARCH {
USHORT    cb;          /* Size of structure  */
PCHAR     pchFind;     /* Logical string to search for  */
PCHAR     pchReplace;  /* Logical string to replace with  */
SHORT     cchFind;     /* Length of pchFind string  */
SHORT     cchReplace;  /* Length of pchReplace string  */
IPT       iptStart;    /* Visual point at which to start search, or point where string was found  */
IPT       iptStop;     /* Visual point at which to stop search  */
USHORT    cchFound;    /* Length of string found at iptStart  */
 } MLE_SEARCHDATA;


ΓòÉΓòÉΓòÉ <hidden> cb ΓòÉΓòÉΓòÉ

 cb (USHORT)
    Size of MLE_SEARCHDATA structure.


ΓòÉΓòÉΓòÉ <hidden> pchFind ΓòÉΓòÉΓòÉ

 pchFind (PCHAR)
    Logical string to search for.


ΓòÉΓòÉΓòÉ <hidden> pchReplace ΓòÉΓòÉΓòÉ

 pchReplace (PCHAR)
    Logical string to replace with.


ΓòÉΓòÉΓòÉ <hidden> cchFind ΓòÉΓòÉΓòÉ

 cchFind (SHORT)
    Length of pchFind string.


ΓòÉΓòÉΓòÉ <hidden> cchReplace ΓòÉΓòÉΓòÉ

 cchReplace (SHORT)
    Length of pchReplace string.


ΓòÉΓòÉΓòÉ <hidden> iptStart ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Visual point at which to start search, or point where string was found.

      non-negative
         Visual point at which to start search.
      negative
         Start search from current visual cursor location.


ΓòÉΓòÉΓòÉ <hidden> iptStop ΓòÉΓòÉΓòÉ

 iptStop (IPT)
    Visual point at which to stop search.

      non-negative
         Visual point at which to stop search.
      negative
         Stop search at end of text.


ΓòÉΓòÉΓòÉ <hidden> cchFound ΓòÉΓòÉΓòÉ

 cchFound (USHORT)
    Length of string found at iptStart.


ΓòÉΓòÉΓòÉ 13.10. PBD_ATTR_MASK ΓòÉΓòÉΓòÉ

PBD_ATTR_MASK Pointer to a BD_ATTR_MASK data structure.

typedef BD_ATTR_MASK *PBD_ATTR_MASK;


ΓòÉΓòÉΓòÉ <hidden> pBD_Attr_Mask ΓòÉΓòÉΓòÉ

pBD_Attr_Mask (PBD_ATTR_MASK) pointer.

Pointer to the BD_ATTR_MASK data structure.


ΓòÉΓòÉΓòÉ <hidden> PCHAR ΓòÉΓòÉΓòÉ

PCHAR Pointer to CHAR.

typedef CHAR *PCHAR;


ΓòÉΓòÉΓòÉ <hidden> PFIELDINFO ΓòÉΓòÉΓòÉ

PFIELDINFO Pointer to a FIELDINFO data structure.

typedef FIELDINFO *PFIELDINFO;


ΓòÉΓòÉΓòÉ <hidden> POINTL ΓòÉΓòÉΓòÉ

POINTL Point structure (long integer).

typedef struct _POINTL {
LONG    x;  /* x-coordinate  */
LONG    y;  /* y-coordinate  */
 } POINTL;


ΓòÉΓòÉΓòÉ <hidden> x ΓòÉΓòÉΓòÉ

 x (LONG)
    x-coordinate.


ΓòÉΓòÉΓòÉ <hidden> y ΓòÉΓòÉΓòÉ

 y (LONG)
    y-coordinate.


ΓòÉΓòÉΓòÉ <hidden> PSZ ΓòÉΓòÉΓòÉ

PSZ Pointer to a null-terminated string.

typedef char *PSZ;


ΓòÉΓòÉΓòÉ <hidden> PTREEITEMDESC ΓòÉΓòÉΓòÉ

PTREEITEMDESC Pointer to a TREEITEMDESC data structure.

typedef TREEITEMDESC *PTREEITEMDESC;


ΓòÉΓòÉΓòÉ <hidden> pFieldInfo ΓòÉΓòÉΓòÉ

 pFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the FIELDINFO structure for the container column that is being
    drawn in the details view. For all other views, this field is NULL.


ΓòÉΓòÉΓòÉ <hidden> PMINIRECORDCORE ΓòÉΓòÉΓòÉ

PMINIRECORDCORE Pointer to a MINIRECORDCORE data structure.

typedef MINIRECORDCORE *PMINIRECORDCORE;


ΓòÉΓòÉΓòÉ <hidden> PRECORDCORE ΓòÉΓòÉΓòÉ

PRECORDCORE Pointer to a RECORDCORE data structure.

typedef RECORDCORE *PRECORDCORE;


ΓòÉΓòÉΓòÉ <hidden> pRecordcore ΓòÉΓòÉΓòÉ

pRecordcore  (PRECORDCORE) pointer

Pointer to the RECORDCORE data structure.


ΓòÉΓòÉΓòÉ <hidden> PUCHAR ΓòÉΓòÉΓòÉ

PUCHAR Pointer to UCHAR.

typedef UCHAR *PUCHAR;


ΓòÉΓòÉΓòÉ <hidden> pulAttr ΓòÉΓòÉΓòÉ

pulAttr Pointer to a BIDIATTR data structure.


ΓòÉΓòÉΓòÉ <hidden> PULONG ΓòÉΓòÉΓòÉ

PULONG Pointer to ULONG.

typedef ULONG *PULONG;


ΓòÉΓòÉΓòÉ <hidden> PVOID ΓòÉΓòÉΓòÉ

PVOID Pointer to a data type of undefined format.

typedef VOID *PVOID;


ΓòÉΓòÉΓòÉ <hidden> RECORDCORE ΓòÉΓòÉΓòÉ

RECORDCORE Structure that contains information for records in a container
control. This data structure is used if the CCS_MINIRECORDCORE style bit is not
specified when a container is created.

typedef struct _RECORDCORE {
ULONG            cb;               /* Structure size  */
ULONG            flRecordAttr;     /* Record attributes  */
POINTL           ptlIcon;          /* Record position  */
PRECORDCORE      preccNextRecord;  /* Pointer  */
PSZ              pszIcon;          /* Text  */
HPOINTER         hptrIcon;         /* Icon  */
HPOINTER         hptrMiniIcon;     /* Mini-icon  */
HBITMAP          hbmBitmap;        /* Bit map  */
HBITMAP          hbmMiniBitmap;    /* Mini-bit map  */
PTREEITEMDESC    pTreeItemDesc;    /* Pointer  */
PSZ              pszText;          /* Text view text  */
PSZ              pszName;          /* Name view text  */
PSZ              pszTree;          /* Tree view text  */
 } RECORDCORE;


ΓòÉΓòÉΓòÉ <hidden> cb ΓòÉΓòÉΓòÉ

 cb (ULONG)
    Structure size.

    The size (in bytes) of the RECORDCORE structure.


ΓòÉΓòÉΓòÉ <hidden> flRecordAttr ΓòÉΓòÉΓòÉ

 flRecordAttr (ULONG)
    Record attributes.

    Attributes of container records. Contains any or all of the following:

      CRA_COLLAPSED
         Specifies that a record is collapsed.
      CRA_CURSORED
         Specifies that a record will be drawn with a selection cursor.
      CRA_DROPONABLE
         Specifies that a record can be a target for direct manipulation.
      CRA_EXPANDED
         Specifies that a record is expanded.
      CRA_FILTERED
         Specifies that a record is filtered, and therefore hidden from view.
      CRA_INUSE
         Specifies that a record will be drawn with in-use emphasis.
      CRA_RECORDREADONLY
         Prevents a record from being edited directly.
      CRA_SELECTED
         Specifies that a record will be drawn with selected-state emphasis.
      CRA_TARGET
         Specifies that a record will be drawn with target emphasis.


ΓòÉΓòÉΓòÉ <hidden> ptlIcon ΓòÉΓòÉΓòÉ

 ptlIcon (POINTL)
    Record position.

    Position of a container record in the icon view.


ΓòÉΓòÉΓòÉ <hidden> preccNextRecord ΓòÉΓòÉΓòÉ

 preccNextRecord (PRECORDCORE)
    Pointer.

    Pointer to the next linked record.


ΓòÉΓòÉΓòÉ <hidden> pszIcon ΓòÉΓòÉΓòÉ

 pszIcon (PSZ)
    Text.

    Text for the icon view (CV_ICON).


ΓòÉΓòÉΓòÉ <hidden> hptrIcon ΓòÉΓòÉΓòÉ

 hptrIcon (HPOINTER)
    Icon.

    Icon that is displayed when the CV_MINI style bit is not specified. This
    field is used when the CA_DRAWICON container attribute of the CNRINFO data
    structure is set.


ΓòÉΓòÉΓòÉ <hidden> hptrMiniIcon ΓòÉΓòÉΓòÉ

 hptrMiniIcon (HPOINTER)
    Mini-icon.

    Icon that is displayed when the CV_MINI style bit is specified. This field
    is used when the CA_DRAWICON container attribute of the CNRINFO data
    structure is set.


ΓòÉΓòÉΓòÉ <hidden> hbmBitmap ΓòÉΓòÉΓòÉ

 hbmBitmap (HBITMAP)
    Bit map.

    Bit map that is displayed when the CV_MINI style bit is not specified. This
    field is used when the CA_DRAWBITMAP container attribute of the CNRINFO
    data structure is set.


ΓòÉΓòÉΓòÉ <hidden> hbmMiniBitmap ΓòÉΓòÉΓòÉ

 hbmMiniBitmap (HBITMAP)
    Mini-bit map.

    Bit map that is displayed when the CV_MINI style bit is specified. This
    field is used when the CA_DRAWBITMAP container attribute of the CNRINFO
    data structure is set.


ΓòÉΓòÉΓòÉ <hidden> pTreeItemDesc ΓòÉΓòÉΓòÉ

 pTreeItemDesc (PTREEITEMDESC)
    Pointer.

    Pointer to a TREEITEMDESC structure, which contains the icons and bit maps
    used to represent the state of an expanded or collapsed parent item in the
    tree name view.


ΓòÉΓòÉΓòÉ <hidden> pszText ΓòÉΓòÉΓòÉ

 pszText (PSZ)
    Text view text.

    Text for the text view (CV_TEXT).


ΓòÉΓòÉΓòÉ <hidden> pszName ΓòÉΓòÉΓòÉ

 pszName (PSZ)
    Name view text.

    Text for the name view (CV_NAME).


ΓòÉΓòÉΓòÉ <hidden> pszTree ΓòÉΓòÉΓòÉ

 pszTree (PSZ)
    Tree view text.

    Text for the tree view (CV_TREE).


ΓòÉΓòÉΓòÉ <hidden> SIZEL ΓòÉΓòÉΓòÉ

SIZEL Size structure.

typedef struct _SIZEL {
LONG    cx;  /* Width  */
LONG    cy;  /* Height  */
 } SIZEL;


ΓòÉΓòÉΓòÉ <hidden> cx ΓòÉΓòÉΓòÉ

 cx (LONG)
    Width.


ΓòÉΓòÉΓòÉ <hidden> cy ΓòÉΓòÉΓòÉ

 cy (LONG)
    Height.


ΓòÉΓòÉΓòÉ <hidden> TREEITEMDESC ΓòÉΓòÉΓòÉ

TREEITEMDESC Structure that contains icons and bit maps used to represent the
state of an expanded or collapsed parent item in the tree name view of a
container control.

typedef struct _TREEITEMDESC {
HBITMAP     hbmExpanded;    /* Expanded bit-map handle  */
HBITMAP     hbmCollapsed;   /* Collapsed bit-map handle  */
HPOINTER    hptrExpanded;   /* Expanded icon handle  */
HPOINTER    hptrCollapsed;  /* Collapsed icon handle  */
 } TREEITEMDESC;


ΓòÉΓòÉΓòÉ <hidden> HAB ΓòÉΓòÉΓòÉ

HAB Anchor-block handle.

typedef LHANDLE HAB;


ΓòÉΓòÉΓòÉ <hidden> hbmExpanded ΓòÉΓòÉΓòÉ

 hbmExpanded (HBITMAP)
    Expanded bit-map handle.

    The handle of the bit map to be used to represent an expanded parent item
    in the tree name view.


ΓòÉΓòÉΓòÉ <hidden> hbmCollapsed ΓòÉΓòÉΓòÉ

 hbmCollapsed (HBITMAP)
    Collapsed bit-map handle.

    The handle of the bit map to be used to represent a collapsed parent item
    in the tree name view.


ΓòÉΓòÉΓòÉ <hidden> hptrExpanded ΓòÉΓòÉΓòÉ

 hptrExpanded (HPOINTER)
    Expanded icon handle.

    The handle of the icon to be used to represent an expanded parent item in
    the tree name view.


ΓòÉΓòÉΓòÉ <hidden> hptrCollapsed ΓòÉΓòÉΓòÉ

 hptrCollapsed (HPOINTER)
    Collapsed icon handle.

    The handle of the icon to be used to represent a collapsed parent item in
    the tree name view.


ΓòÉΓòÉΓòÉ <hidden> HWND ΓòÉΓòÉΓòÉ

HWND Window handle.

typedef LHANDLE HWND;


ΓòÉΓòÉΓòÉ <hidden> UCHAR ΓòÉΓòÉΓòÉ

UCHAR Unsigned integer in the range 0 through 255.

typedef unsigned char UCHAR;


ΓòÉΓòÉΓòÉ <hidden> ulData ΓòÉΓòÉΓòÉ

 ulData (ULONG)

    User-defined value.


ΓòÉΓòÉΓòÉ <hidden> ULONG ΓòÉΓòÉΓòÉ

ULONG Unsigned integer in the range 0 through 4 294 967 295.

typedef unsigned long ULONG;


ΓòÉΓòÉΓòÉ <hidden> ulNotify ΓòÉΓòÉΓòÉ

 The following is a list of possible values for these events:

LVI_WND_ATTR       - Window Bidi attributes changed.
LVI_WND_STAT       - Window Bidi status changed.
LVI_FOCUS_CHANGED  - The focus window has changed.
LVI_KBD_LAYER      - The system keyboard layer has changed.
LVI_ALL            - All information in the viewer must be updated.
LVI_HIDE           - This value is used when the system notifies the
                     viewer to hide itself (such as when another viewer
                     is the active one).


ΓòÉΓòÉΓòÉ <hidden> ulPageId ΓòÉΓòÉΓòÉ

 ulPageId (ULONG)
    Page identifier.

    Page identifier used for placement of the inserted page.


ΓòÉΓòÉΓòÉ <hidden> ulPageId ΓòÉΓòÉΓòÉ

 ulPageId (ULONG)
    Page id

    Page identifier of the page whose tab text is requested.


ΓòÉΓòÉΓòÉ <hidden> ulPageId ΓòÉΓòÉΓòÉ

 ulPageId (ULONG)
    Page id

    Page identifier of the page whose Status line text is requested.


ΓòÉΓòÉΓòÉ <hidden> USHORT ΓòÉΓòÉΓòÉ

USHORT Unsigned integer in the range 0 through 65 535.

typedef unsigned short USHORT;


ΓòÉΓòÉΓòÉ <hidden> CM_SHORTRECORD ΓòÉΓòÉΓòÉ

PLEASE REFER TO THE PM REFERNCE.


ΓòÉΓòÉΓòÉ <hidden> WM_PRESPARAMCHANGED ΓòÉΓòÉΓòÉ

PLEASE REFER TO THE PM REFERNCE.


ΓòÉΓòÉΓòÉ <hidden> CM_PAINTBACKGROUND ΓòÉΓòÉΓòÉ

PLEASE REFER TO THE PM REFERNCE.


ΓòÉΓòÉΓòÉ <hidden> WinGetLastError ΓòÉΓòÉΓòÉ

PLEASE REFER TO THE PM REFERNCE.


ΓòÉΓòÉΓòÉ <hidden> ERROR_INVALID_LENGTH ΓòÉΓòÉΓòÉ

PLEASE REFER TO THE PM REFERNCE.


ΓòÉΓòÉΓòÉ <hidden> BIDI_STAT_VALUES ΓòÉΓòÉΓòÉ

Possible value for Bidi Status :

#define BDS_HKFLAG_ENG_LAYER            0x00010000UL
#define BDS_HKFLAG_NAT_LAYER            0x00020000UL
#define BDS_HKFLAG_PUSH                 0x00040000UL
#define BDS_HKFLAG_END_PUSH             0x00080000UL
#define BDS_HKFLAG_AUTO_PUSH            0x00100000UL
#define BDS_HKFLAG_FIELD_REV            0x00200000UL
#define BDS_HKFLAG_SCREEN_REV           0x00400000UL
#define BDS_HKFLAG_BIDI_POPUP           0x02000000UL
#define BDS_HKFLAG_AUTOMATIC            0x04000000UL
#define BDS_HKFLAG_INITIAL              0x08000000UL
#define BDS_HKFLAG_MIDDLE               0x10000000UL
#define BDS_HKFLAG_FINAL                0x20000000UL
#define BDS_HKFLAG_ISOLATED             0x40000000UL

#define BDS_FAUTOPUSH_RTL_ON            0x00000001UL
#define BDS_FAUTOPUSH_LTR_ON            0x00000002UL
#define BDS_FPUSH_ON                    0x00000004UL
#define BDS_FKBD_LAYER_IS_NL            0x00000010UL


ΓòÉΓòÉΓòÉ <hidden> LI_BD_CLIP_ATTR ΓòÉΓòÉΓòÉ

 When ulEffect is set to LI_BD_CLIP_ATTR the ulMask value is ignored and ulData
may be set to the following attributes that describe the text in the clipboard:

   o  uldata

             #define BDA_LEVEL                   0x30000000UL
             #define BDA_INIT                    0x80000000UL

             #define BDA_DATATYPE_VISUAL        0x00000000UL
             #define BDA_DATATYPE_IMPLICIT      0x01000000UL

             #define BDA_TEXT_ORIENT_LTR        0x00000000UL
             #define BDA_TEXT_ORIENT_RTL        0x00010000UL
             #define BDA_TEXT_ORIENT_DYNAMIC    0x00020000UL

             #define BDA_WND_ORIENT_LTR         0x00000000UL
             #define BDA_WND_ORIENT_RTL         0x00100000UL

             #define BDA_NUMERALS_ARABIC        0x00000000UL
             #define BDA_NUMERALS_WESTERN       0x00000000UL
             #define BDA_NUMERALS_PASSTHRU      0x00001000UL
             #define BDA_NUMERALS_HINDI         0x00002000UL
             #define BDA_NUMERALS_CONTEXT       0x00003000UL

             #define BDA_WORDBREAK_OFF          0x00000000UL
             #define BDA_WORDBREAK_ON           0x00000200UL
             #define BDA_SYM_SWAP_OFF           0x00000000UL
             #define BDA_SYM_SWAP_ON            0x00000100UL

             #define BDA_CSD_ON                 0x00000000UL
             #define BDA_CSD_PASSTHRU           0x00000001UL
             #define BDA_CSD_BASE               0x00000010UL
             #define BDA_CSD_INITIAL            0x00000011UL
             #define BDA_CSD_MIDDLE             0x00000012UL
             #define BDA_CSD_FINAL              0x00000013UL
             #define BDA_CSD_ISOLATED           0x00000014UL


ΓòÉΓòÉΓòÉ <hidden> LI_BD_CLIP_CONV_ATTR ΓòÉΓòÉΓòÉ

When ulEffect is set to LI_BD_CLIP_CONV_ATTR the ulMask value is ignored and
ulData may be set to the following attributes of the window that queries text
data from the clipboard:

   o  uldata

             #define BDA_LEVEL                   0x30000000UL
             #define BDA_INIT                    0x80000000UL

             #define BDA_DATATYPE_VISUAL        0x00000000UL
             #define BDA_DATATYPE_IMPLICIT      0x01000000UL

             #define BDA_TEXT_ORIENT_LTR        0x00000000UL
             #define BDA_TEXT_ORIENT_RTL        0x00010000UL
             #define BDA_TEXT_ORIENT_DYNAMIC    0x00020000UL

             #define BDA_WND_ORIENT_LTR         0x00000000UL
             #define BDA_WND_ORIENT_RTL         0x00100000UL

             #define BDA_NUMERALS_ARABIC        0x00000000UL
             #define BDA_NUMERALS_WESTERN       0x00000000UL
             #define BDA_NUMERALS_PASSTHRU      0x00001000UL
             #define BDA_NUMERALS_HINDI         0x00002000UL
             #define BDA_NUMERALS_CONTEXT       0x00003000UL

             #define BDA_WORDBREAK_OFF          0x00000000UL
             #define BDA_WORDBREAK_ON           0x00000200UL
             #define BDA_SYM_SWAP_OFF           0x00000000UL
             #define BDA_SYM_SWAP_ON            0x00000100UL

             #define BDA_CSD_ON                 0x00000000UL
             #define BDA_CSD_PASSTHRU           0x00000001UL
             #define BDA_CSD_BASE               0x00000010UL
             #define BDA_CSD_INITIAL            0x00000011UL
             #define BDA_CSD_MIDDLE             0x00000012UL
             #define BDA_CSD_FINAL              0x00000013UL
             #define BDA_CSD_ISOLATED           0x00000014UL


ΓòÉΓòÉΓòÉ <hidden> LI_BD_PROCESS_ATTR ΓòÉΓòÉΓòÉ

When ulEffect is set to LI_BD_PROCESS_ATTR the ulMask value is ignored and
ulData may be set to the following process attributes:

   o  uldata

             #define BDA_LEVEL                   0x30000000UL
             #define BDA_INIT                    0x80000000UL

             #define BDA_DATATYPE_VISUAL        0x00000000UL
             #define BDA_DATATYPE_IMPLICIT      0x01000000UL

             #define BDA_TEXT_ORIENT_LTR        0x00000000UL
             #define BDA_TEXT_ORIENT_RTL        0x00010000UL
             #define BDA_TEXT_ORIENT_DYNAMIC    0x00020000UL

             #define BDA_WND_ORIENT_LTR         0x00000000UL
             #define BDA_WND_ORIENT_RTL         0x00100000UL

             #define BDA_NUMERALS_ARABIC        0x00000000UL
             #define BDA_NUMERALS_WESTERN       0x00000000UL
             #define BDA_NUMERALS_PASSTHRU      0x00001000UL
             #define BDA_NUMERALS_HINDI         0x00002000UL
             #define BDA_NUMERALS_CONTEXT       0x00003000UL

             #define BDA_WORDBREAK_OFF          0x00000000UL
             #define BDA_WORDBREAK_ON           0x00000200UL
             #define BDA_SYM_SWAP_OFF           0x00000000UL
             #define BDA_SYM_SWAP_ON            0x00000100UL

             #define BDA_CSD_ON                 0x00000000UL
             #define BDA_CSD_PASSTHRU           0x00000001UL
             #define BDA_CSD_BASE               0x00000010UL
             #define BDA_CSD_INITIAL            0x00000011UL
             #define BDA_CSD_MIDDLE             0x00000012UL
             #define BDA_CSD_FINAL              0x00000013UL
             #define BDA_CSD_ISOLATED           0x00000014UL


ΓòÉΓòÉΓòÉ <hidden> LI_BD_PROCESS_STAT ΓòÉΓòÉΓòÉ

When ulEffect is set to LI_BD_PROCESS_STAT the ulMask value is ignored and
ulData may be set to the following process status:

   o  uldata


            #define BDS_HKFLAG_ENG_LAYER            0x00010000UL
            #define BDS_HKFLAG_NAT_LAYER            0x00020000UL
            #define BDS_HKFLAG_PUSH                 0x00040000UL
            #define BDS_HKFLAG_END_PUSH             0x00080000UL
            #define BDS_HKFLAG_AUTO_PUSH            0x00100000UL
            #define BDS_HKFLAG_FIELD_REV            0x00200000UL
            #define BDS_HKFLAG_SCREEN_REV           0x00400000UL
            #define BDS_HKFLAG_BIDI_POPUP           0x02000000UL
            #define BDS_HKFLAG_AUTOMATIC            0x04000000UL
            #define BDS_HKFLAG_INITIAL              0x08000000UL
            #define BDS_HKFLAG_MIDDLE               0x10000000UL
            #define BDS_HKFLAG_FINAL                0x20000000UL
            #define BDS_HKFLAG_ISOLATED             0x40000000UL

            #define BDS_FAUTOPUSH_RTL_ON            0x00000001UL
            #define BDS_FAUTOPUSH_LTR_ON            0x00000002UL
            #define BDS_FPUSH_ON                    0x00000004UL
            #define BDS_FKBD_LAYER_IS_NL            0x00000010UL


ΓòÉΓòÉΓòÉ <hidden> LI_BD_WND_ATTR ΓòÉΓòÉΓòÉ

 When ulEffect is set to BD_WND_ATTR the possible values of uldata and ulMask
are  set to the following:

   o  uldata

             #define BDA_LEVEL                   0x30000000UL
             #define BDA_INIT                    0x80000000UL

             #define BDA_DATATYPE_VISUAL        0x00000000UL
             #define BDA_DATATYPE_IMPLICIT      0x01000000UL

             #define BDA_TEXT_ORIENT_LTR        0x00000000UL
             #define BDA_TEXT_ORIENT_RTL        0x00010000UL
             #define BDA_TEXT_ORIENT_DYNAMIC    0x00020000UL

             #define BDA_WND_ORIENT_LTR         0x00000000UL
             #define BDA_WND_ORIENT_RTL         0x00100000UL

             #define BDA_NUMERALS_ARABIC        0x00000000UL
             #define BDA_NUMERALS_WESTERN       0x00000000UL
             #define BDA_NUMERALS_PASSTHRU      0x00001000UL
             #define BDA_NUMERALS_HINDI         0x00002000UL
             #define BDA_NUMERALS_CONTEXT       0x00003000UL

             #define BDA_WORDBREAK_OFF          0x00000000UL
             #define BDA_WORDBREAK_ON           0x00000200UL
             #define BDA_SYM_SWAP_OFF           0x00000000UL
             #define BDA_SYM_SWAP_ON            0x00000100UL

             #define BDA_CSD_ON                 0x00000000UL
             #define BDA_CSD_PASSTHRU           0x00000001UL
             #define BDA_CSD_BASE               0x00000010UL
             #define BDA_CSD_INITIAL            0x00000011UL
             #define BDA_CSD_MIDDLE             0x00000012UL
             #define BDA_CSD_FINAL              0x00000013UL
             #define BDA_CSD_ISOLATED           0x00000014UL

   o  ulmask

            #define BDAM_INIT               0x80000000UL
            #define BDAM_DATATYPE           0x01000000UL
            #define BDAM_TEXT_ORIENTATION   0x00030000UL
            #define BDAM_WND_ORIENTATION    0x00100000UL
            #define BDAM_NUMERALS           0x00003000UL
            #define BDAM_SYM_SWAP           0x00000100UL
            #define BDAM_CSD                0x000000FFUL

            #define BDAM_ALL               (BDAM_DATATYPE         |
                                            BDAM_TEXT_ORIENTATION |
                                            BDAM_WND_ORIENTATION  |
                                            BDAM_NUMERALS         |
                                            BDAM_SYM_SWAP         |
                                            BDAM_CSD               )


ΓòÉΓòÉΓòÉ <hidden> LI_BD_WND_STAT ΓòÉΓòÉΓòÉ

 When ulEffect is set to LI_BD_WND_STAT the possible values of uldata and
ulMask are  set to the following:

   o  uldata


            #define BDS_HKFLAG_ENG_LAYER            0x00010000UL
            #define BDS_HKFLAG_NAT_LAYER            0x00020000UL
            #define BDS_HKFLAG_PUSH                 0x00040000UL
            #define BDS_HKFLAG_END_PUSH             0x00080000UL
            #define BDS_HKFLAG_AUTO_PUSH            0x00100000UL
            #define BDS_HKFLAG_FIELD_REV            0x00200000UL
            #define BDS_HKFLAG_SCREEN_REV           0x00400000UL
            #define BDS_HKFLAG_BIDI_POPUP           0x02000000UL
            #define BDS_HKFLAG_AUTOMATIC            0x04000000UL
            #define BDS_HKFLAG_INITIAL              0x08000000UL
            #define BDS_HKFLAG_MIDDLE               0x10000000UL
            #define BDS_HKFLAG_FINAL                0x20000000UL
            #define BDS_HKFLAG_ISOLATED             0x40000000UL

            #define BDS_FAUTOPUSH_RTL_ON            0x00000001UL
            #define BDS_FAUTOPUSH_LTR_ON            0x00000002UL
            #define BDS_FPUSH_ON                    0x00000004UL
            #define BDS_FKBD_LAYER_IS_NL            0x00000010UL

   o  ulMask

            #define BDSM_HKFLAGS                    0x7E7F0000UL

            #define BDSM_AUTOPUSH_RTL               0x00000001UL
            #define BDSM_AUTOPUSH_LTR               0x00000002UL
            #define BDSM_PUSH_ON                    0x00000004UL
            #define BDSM_KBD_LAYER                  0x00000010UL

            #define BDSM_ALL                        0x7E7F0017UL


ΓòÉΓòÉΓòÉ <hidden> ulMask ΓòÉΓòÉΓòÉ

 ulMask (ULONG)

    Contains one of the following Bidi attribute mask values:

        #define BDAM_DATATYPE           0x01000000UL
        #define BDAM_TEXT_ORIENTATION   0x00030000UL
        #define BDAM_WND_ORIENTATION    0x00100000UL
        #define BDAM_NUMERALS           0x00003000UL
        #define BDAM_SYM_SWAP           0x00000100UL
        #define BDAM_CSD                0x000000FFUL

        #define BDAM_ALL               (BDAM_DATATYPE         |
                                        BDAM_TEXT_ORIENTATION |
                                        BDAM_WND_ORIENTATION  |
                                        BDAM_NUMERALS         |
                                        BDAM_SYM_SWAP         |
                                        BDAM_CSD               )


ΓòÉΓòÉΓòÉ <hidden> ulMask ΓòÉΓòÉΓòÉ

 ulMask (ULONG)

    Contains one of the following Bidi status mask values:

        #define BDSM_HKFLAGS                    0x7E7F0000UL

        #define BDSM_AUTOPUSH_RTL               0x00000001UL
        #define BDSM_AUTOPUSH_LTR               0x00000002UL
        #define BDSM_PUSH_ON                    0x00000004UL
        #define BDSM_KBD_LAYER                  0x00000010UL

        #define BDSM_ALL                        0x7E7F0017UL


ΓòÉΓòÉΓòÉ <hidden> BIDIFLAGS ΓòÉΓòÉΓòÉ

 ulFlags (ULONG)

    Contains one of the following flag values:

        #define LIF_NO_SENDMSG        0x00000001UL
        #define LIF_CHILD_INHERIT     0x00000002UL
        #define LIF_WND_REFRESH       0x00000004UL


ΓòÉΓòÉΓòÉ <hidden> BIDIFLAGS ΓòÉΓòÉΓòÉ

 ulFlags (ULONG)

    Contains one of the following flag values:
 OL
    When this is specified the function sends (internally) a WM_QUERYBIDIATTR
    (or WM_QUERYBIDISTAT) message to the return value procedure. If the return
    value of the message is other than zero this is the value Returned.
 LIF_NO_SENDMSG
    When this value is specified, the WinQueryBidiInfo function, does not send
    a WM_QUERYBIDIATTR (or WM_QUERYBIDISTAT) message to the window procedure of
    hwnd. Instead, it returns the Bidi attributes/status as it is stored in the
    window internal strucrure.


ΓòÉΓòÉΓòÉ <hidden> ulBD_ATTR ΓòÉΓòÉΓòÉ

ulBD_ATTR can take any of the values in the BIDIATTR.


ΓòÉΓòÉΓòÉ <hidden> ulBD_STAT ΓòÉΓòÉΓòÉ

ulBD_STAT can take any of the values in the BIDI_STAT.


ΓòÉΓòÉΓòÉ <hidden> ulBD_Mask ΓòÉΓòÉΓòÉ

ulBD_Mask can take any of the following values When used in the
WM_LANGVIEWINFOCHANGED message.

#define BDAM_DATATYPE           0x01000000UL
#define BDAM_TEXT_ORIENTATION   0x00030000UL
#define BDAM_WND_ORIENTATION    0x00100000UL
#define BDAM_NUMERALS           0x00003000UL
#define BDAM_SYM_SWAP           0x00000100UL
#define BDAM_CSD                0x000000FFUL

#define BDAM_ALL               (BDAM_DATATYPE         |
                                BDAM_TEXT_ORIENTATION |
                                BDAM_WND_ORIENTATION  |
                                BDAM_NUMERALS         |
                                BDAM_SYM_SWAP         |
                                BDAM_CSD               )


ΓòÉΓòÉΓòÉ <hidden> usColumn ΓòÉΓòÉΓòÉ

usColumn (USHORT)

Column index

The index of the column over which the direct manipulation action occurred.


ΓòÉΓòÉΓòÉ <hidden> usRow ΓòÉΓòÉΓòÉ

usRow (USHORT)

Row index

The index of the row over which the direct manipulation action occurred.


ΓòÉΓòÉΓòÉ <hidden> ulData ΓòÉΓòÉΓòÉ

 ulData (ULONG)

    Contains one of the values inBIDIATTR.


ΓòÉΓòÉΓòÉ <hidden> ulData ΓòÉΓòÉΓòÉ

 ulData (ULONG)

    Contains one of the values inBIDI_STAT.


ΓòÉΓòÉΓòÉ 13.11. BOOKPAGEBIDIINFO ΓòÉΓòÉΓòÉ

BOOKPAGEBIDIINFO

The BOOKPAGEBIDIINFO structure contains the Bidi attributes of the notebook
major and minor tabs and of the status line.

   typedef struct _BOOKPAGEBIDIINFO
   {
      BD_ATTR_MASK  bamMajorTab;
      BD_ATTR_MASK  bamMinorTab;
      BD_ATTR_MASK  bamStatusLine;
   } BOOKPAGEBIDIINFO;


ΓòÉΓòÉΓòÉ 13.12. PBOOKPAGEBIDIINFO ΓòÉΓòÉΓòÉ

PBOOKPAGEBIDIINFO

Pointer to BOOKPAGEBIDIINFO.

   typedef BOOKPAGEBIDIINFO * PBOOKPAGEBIDIINFO;


ΓòÉΓòÉΓòÉ <hidden> PVSCDATA ΓòÉΓòÉΓòÉ

PVSCDATA Pointer to VSCDATA.

typedef VSCDATA *PVSCDATA;


ΓòÉΓòÉΓòÉ <hidden> VSCDATA ΓòÉΓòÉΓòÉ

VSCDATA Structure that contains information about the value set control.

typedef struct _VSCDATA {
ULONG     cbSize;         /* Data length  */
USHORT    usRowCount;     /* Number of rows  */
USHORT    usColumnCount;  /* Number of columns  */
 } VSCDATA;


ΓòÉΓòÉΓòÉ <hidden> cbSize ΓòÉΓòÉΓòÉ

 cbSize (ULONG)
    Data length.

    Length of the control data in bytes.


ΓòÉΓòÉΓòÉ <hidden> usRowCount ΓòÉΓòÉΓòÉ

 usRowCount (USHORT)
    Number of rows.

    The number of rows in the value set control. The minimum number of rows is
    1 and the maximum number of rows is 65,535.


ΓòÉΓòÉΓòÉ <hidden> usColumnCount ΓòÉΓòÉΓòÉ

 usColumnCount (USHORT)
    Number of columns.

    The number of columns in the value set control. The minimum number of
    columns is 1 and the maximum number of columns is 65,535.


ΓòÉΓòÉΓòÉ <hidden> USHORT ΓòÉΓòÉΓòÉ

USHORT Unsigned integer in the range 0 through 65 535.

typedef unsigned USHORT UUSHORT;


ΓòÉΓòÉΓòÉ <hidden> IPT ΓòÉΓòÉΓòÉ

IPT Insertion point for multi-line entry field.

typedef LONG IPT;


ΓòÉΓòÉΓòÉ <hidden> PBUFFER ΓòÉΓòÉΓòÉ

PBUFFER Pointer to PBYTE.

typedef BUFFER *PBUFFER;


ΓòÉΓòÉΓòÉ <hidden> PFATTRS ΓòÉΓòÉΓòÉ

PFATTRS Pointer to FATTRS

typedef FATTRS *PFATTRS;


ΓòÉΓòÉΓòÉ <hidden> PIPT ΓòÉΓòÉΓòÉ

PIPT Pointer to IPT

typedef IPT *PIPT;


ΓòÉΓòÉΓòÉ <hidden> PIX ΓòÉΓòÉΓòÉ

PIX Pel count for multi-line entry field.

typedef LONG PIX;


ΓòÉΓòÉΓòÉ <hidden> PMLE_SEARCHDATA ΓòÉΓòÉΓòÉ

PMLE_SEARCHDATA Pointer to an MLE_SEARCHDATA data structure.

typedef LONG *PMLE_SEARCHDATA;


ΓòÉΓòÉΓòÉ <hidden> PPOINTL ΓòÉΓòÉΓòÉ

PPOINTL Pointer to a POINTL data structure.

typedef POINTL *POINTL;


ΓòÉΓòÉΓòÉ 14. Message Processing ΓòÉΓòÉΓòÉ

Window Messages in the PM Bidirectional environment are processed by window and
dialog procedures. Please refer to the explanation of message processing in the
PM reference.


ΓòÉΓòÉΓòÉ 14.1. Container Control ΓòÉΓòÉΓòÉ

Processing of the Container control messages in the PM Bidirectional
environment is the same as in the Non-Bidirectional PM environment. However,
the Container control is sensitive to its Bidirectional attributes and handles
formatting and presentation accordingly.

The container supports all text Bidi attributes. This support is done in a
hierarchy so that every level (class) of container sub-levels inherits the
container attributes by default. These defaults attributes may be overridden by
a Bidi-Aware application.

The bidi attributes hierarchy of the container controls works as follows:

      The Container Field bidi attributes can be set by sending a
      CM_SETFIELDBIDIATTR message to the container. If the field bidi
      attributes word is not specifially set by sending the message - the field
      uses its (parent) record bidi attributes.

      The Container Record bidi attributes can be set by sending the
      CM_SETITEMBIDIATTR message. If the record bidi attributes are not
      specifically set by sending the message - the record uses the container
      window bidi attributes.

 The above inheritance chain defines the effective bidi attribute that is used
 in processing of a container object.


ΓòÉΓòÉΓòÉ 14.1.1. CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message queries the bidirectional attributes of a specific Container
Field.

Parameters:


param1
    PFIELDINFO  pFieldInfo    Pointer.

param2
    PULONG      pBidiAttr     Pointer.

returns
    BOOL        fSuccess      Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 pFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the FIELDINFO data structure.

 pBidiAttr (PULONG)
    Pointer.

    Pointer to the values of the Bidi attributes that are returned. Possible
    values  are in the BIDIATTR data structure.


ΓòÉΓòÉΓòÉ <hidden> pFieldInfo ΓòÉΓòÉΓòÉ

 pFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the FIELDINFO data structure.


ΓòÉΓòÉΓòÉ <hidden> pBidiAttr ΓòÉΓòÉΓòÉ

 pBidiAttr (PULONG)
    Pointer.

    Pointer to the values of the Bidi attributes that are returned. Possible
    values  are in the BIDIATTR data structure.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - CM_QUERYFIELDBIDIINFO ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the container bidi information succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the container bidi information succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 This is the main expl.of cm NOTES


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - CM_QUERYFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.1.2. CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message queries the bidirectional attributes of a specific Container Item
(record).

Parameters:


param1
    PRECORDCORE  precordcore    Pointer.

param2
    PULONG       pBidiAttr      Pointer.

returns
    BOOL         fsuccess       Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 pRecordCore (PRECORDCORE)
    Pointer.

    Pointer to the RECORDINFO data structure.

 pBidiAttr (PULONG)
    Pointer.

    Pointer to the values of the Bidi attributes that are returned. Possible
    values  are in the BIDIATTR data structure.


ΓòÉΓòÉΓòÉ <hidden> pRecordCore ΓòÉΓòÉΓòÉ

 pRecordCore (PRECORDCORE)
    Pointer.

    Pointer to the RECORDINFO data structure.


ΓòÉΓòÉΓòÉ <hidden> pBidiAttr ΓòÉΓòÉΓòÉ

 pBidiAttr (PULONG)
    Pointer.

    Pointer to the values of the Bidi attributes that are returned. Possible
    values  are in the BIDIATTR data structure.


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi item information succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - CM_QUERYITEMBIDIINFO ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi item information succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 This is the main expl.of cm NOTES


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - CM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.1.3. CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message sets the bidirectional attributes of a specific Container Field.

Parameters:


param1
    PFIELDINFO        pFieldInfo        Pointer.

param2
    PBD_ATTR_MASK     pBD_Attr_Mask     Pointer.

returns
    BOOL              fsuccess          Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 pFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the FIELDINFO data structure.

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure.


ΓòÉΓòÉΓòÉ <hidden> pFieldInfo ΓòÉΓòÉΓòÉ

 pFieldInfo (PFIELDINFO)
    Pointer.

    Pointer to the FIELDINFO data structure.


ΓòÉΓòÉΓòÉ <hidden> pBD_Attr_Mask ΓòÉΓòÉΓòÉ

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the field bidi attribute succeeded.
      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the field bidi attribute succeeded.
      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 This is the main expl.of cm NOTES


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - CM_SETFIELDBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.1.4. CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message sets the bidirectional attributes of a specific Container Item
(record).

Parameters:


param1
    PRECORDCORE     precordcore     Pointer.

param2
    PBD_ATTR_MASK   pBD_Attr_Mask   Pointer.

returns
    BOOL            fsuccess        Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 pRecordCore (PRECORDCORE)
    Pointer.

    Pointer to the RECORDCORE data structure.

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure.


ΓòÉΓòÉΓòÉ <hidden> pRecordCore ΓòÉΓòÉΓòÉ

 pRecordCore (PRECORDCORE)
    Pointer.

    Pointer to the RECORDCORE data structure.


ΓòÉΓòÉΓòÉ <hidden> pBD_Attr_Mask ΓòÉΓòÉΓòÉ

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the bidi item attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the bidi item attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 This is the main expl.of cm NOTES


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - CM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.2. Multi-Line Entry Field Control ΓòÉΓòÉΓòÉ

Processing of Multi-Line Entry Field control messages in the PM Bidirectional
environment is the same as in the non-bidirectional PM environment. However,
the Multi-Line Entry Field control is sensitive to its Bidirectional attributes
and handles formatting and presentation accordingly.


ΓòÉΓòÉΓòÉ 14.2.1. MLM_CLEAR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_CLEAR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_CLEAR ΓòÉΓòÉΓòÉ

Cause:

This message clears the currently selected text. When the text type of the MLE
is implicit, the characters affected may not necessarily be adjacent in the
text buffer : the action is taken on the visually selected text which is
continous on the screen.

Parameters:

param1
    ULONG param1  Reserved.

param2
    ULONG param2  Reserved.

returns
    ULONG ulClear Number of bytes deleted, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_CLEAR ΓòÉΓòÉΓòÉ

The multi-line entry field control window procedure responds to this message by
clearing the current visual selection and returning the number of bytes
cleared.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_CLEAR ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulClear to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_CLEAR ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_CLEAR ΓòÉΓòÉΓòÉ

 ulClear (ULONG)
    Number of bytes deleted, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulClear ΓòÉΓòÉΓòÉ

 ulClear (ULONG)
    Number of bytes deleted, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ 14.2.2. MLM_COPY ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_COPY ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_COPY ΓòÉΓòÉΓòÉ

Cause:

This message copies the currently selected text to the clipboard. When the text
type of the MLE is implicit, the characters affected may not necessarily be
adjacent in the text buffer : the action is taken on the visually selected text
which is continous on the screen.

Parameters:

param1
    ULONG param1 Reserved.

param2
    ULONG param2 Reserved.

returns
    ULONG ulCopy Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_COPY ΓòÉΓòÉΓòÉ

The multi-line entry field control window procedure responds to this message by
copying the visually selected text to the clipboard.  The text is translated to
standard clipboard format, which is the same as exporting with MLE_CFTEXT
format.

The text is placed on the clipboard as a single contiguous data segment. This
restricts the amount to the maximum segment size (64KB).

This may cause an overflow, see MLN_OVERFLOW.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_COPY ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulCopy to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_COPY ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_COPY ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulCopy ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ 14.2.3. MLM_CUT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_CUT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_CUT ΓòÉΓòÉΓòÉ

Cause:

This message copies the text that forms the currently selected text to the
clipboard and then deletes it from the MLE control.  When the text type of the
MLE is implicit, the characters affected may not necessarily be adjacent in the
text buffer : the action is taken on the visually selected text which is
continous on the screen.

Parameters:

param1
    ULONG param1 Reserved.

param2
    ULONG param2 Reserved.

returns
    ULONG ulCopy Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_CUT ΓòÉΓòÉΓòÉ

The multi-line entry field control window procedure responds to this message by
copying the selected text to the clipboard and then deleting it. The text is
translated to standard clipboard format, which is the same as exporting with
MLE_CFTEXT format.

The text is placed on the clipboard as a single contiguous data segment. This
restricts the amount to the maximum segment size (64KB).

This may cause an overflow, see MLN_OVERFLOW.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_CUT ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulCopy to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_CUT ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_CUT ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulCopy ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ 14.2.4. MLM_DELETE ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_DELETE ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_DELETE ΓòÉΓòÉΓòÉ

Cause:

This message deletes text based on the VISUAL selection.

Parameters:

param1
    IPT   iptBegin  VISUAL Starting point of deletion.

param2
    ULONG ulDel     Number of bytes to delete.

returns
    ULONG ulSuccess Number of bytes successfully deleted.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_DELETE ΓòÉΓòÉΓòÉ

This message takes an insertion point and a length, and deletes that number of
characters from the text.  If the insertion point is -1, the selection is used
and the effect is identical to the MLM_CLEAR message.

This may cause an overflow, see MLN_OVERFLOW.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_DELETE ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulSuccess to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_DELETE ΓòÉΓòÉΓòÉ

 iptBegin (IPT)
    Visual starting point of deletion.

 ulDel (ULONG)
    Number of bytes to delete.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_DELETE ΓòÉΓòÉΓòÉ

 ulSuccess (ULONG)
    Number of bytes successfully deleted.


ΓòÉΓòÉΓòÉ <hidden> iptBegin ΓòÉΓòÉΓòÉ

 iptBegin (IPT)
    Visual starting point of deletion.


ΓòÉΓòÉΓòÉ <hidden> ulDel ΓòÉΓòÉΓòÉ

 ulDel (ULONG)
    Number of bytes to delete.


ΓòÉΓòÉΓòÉ <hidden> ulSuccess ΓòÉΓòÉΓòÉ

 ulSuccess (ULONG)
    Number of bytes successfully deleted.


ΓòÉΓòÉΓòÉ 14.2.5. MLM_EXPORT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_EXPORT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_EXPORT ΓòÉΓòÉΓòÉ

Cause:

This message exports VISUALLY selected text to a buffer.

Parameters:

param1
    PIPT   pBegin    Visual starting point.

param2
    PULONG pCopy     Number of bytes being exported.

returns
    ULONG  ulSuccess Number of bytes successfully exported.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_EXPORT ΓòÉΓòÉΓòÉ

This message takes a visual insertion point and length as parameters, and
copies text, starting from that insertion point, into the buffer set by
MLM_SETIMPORTEXPORT. Text is in the format set by MLM_FORMAT. If the insertion
point is -1, the selection is used for both pBegin and pCopy.

On return, pBegin is updated to follow the last byte exported, and the number
of bytes to be exported is decremented by the number actually exported.  This
is done to prepare those parameter values for the next export.  The return
value indicates the number of bytes actually put into the buffer.  This number
is less than, or equal to, the buffer size (see MLM_SETIMPORTEXPORT).

Note:   All exports are done in full characters.  Therefore, if either the
        length of the buffer or the number of bytes to be exported result in
        the last byte transferred being only half of a DBCS character, the MLE
        will not transfer that byte.

 It returns the number of bytes placed in the export buffer.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_EXPORT ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulSuccess to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_EXPORT ΓòÉΓòÉΓòÉ

 pBegin (PIPT)
    Visual starting point.

    Updated to follow the last character exported.

 pCopy (PULONG)
    Number of bytes being exported.

    Decremented by the number of bytes actually exported.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_EXPORT ΓòÉΓòÉΓòÉ

 ulSuccess (ULONG)
    Number of bytes successfully exported.


ΓòÉΓòÉΓòÉ <hidden> pBegin ΓòÉΓòÉΓòÉ

 pBegin (PIPT)
    Visual starting point.

    Updated to follow the last character exported.


ΓòÉΓòÉΓòÉ <hidden> pCopy ΓòÉΓòÉΓòÉ

 pCopy (PULONG)
    Number of bytes being exported.

    Decremented by the number of bytes actually exported.


ΓòÉΓòÉΓòÉ <hidden> ulSuccess ΓòÉΓòÉΓòÉ

 ulSuccess (ULONG)
    Number of bytes successfully exported.


ΓòÉΓòÉΓòÉ 14.2.6. MLM_IMPORT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_IMPORT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ 14.2.7. MLM_INSERT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_INSERT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_INSERT ΓòÉΓòÉΓòÉ

Cause:

This message deletes the currently selected text and replaces it with a text
string. When the text type of the MLE is implicit, the characters affected may
not necessarily be adjacent in the text buffer : the action is taken on the
visually selected text which is continous on the screen.

Parameters:

param1
    PSTRL pText   Null-terminated text string.

param2
    ULONG param2  Reserved.

returns
    ULONG ulCount  Number of bytes actually inserted.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_INSERT ΓòÉΓòÉΓòÉ

This message inserts the text string at the currently selected text, visually
deleting that selection. Unlike in the English mode, deletion does not occur in
the same manner as typing at the keyboard would. This is because typing Arabic
in overwrite mode would replace characters in logical order not visual order.

The text string must be in CF_TEXT format (or one of the formats acceptable to
MLM_IMPORT) and null-terminated. The line-break (CR LF, LF, and so on) is
counted as one byte, regardless of the number of bytes occupied in the buffer,
and the null terminator is not counted.

This interacts with the format rectangle and text limits, and a return of less
than the full count can be the result.  If so, a notification message is sent.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_INSERT ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulCount to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_INSERT ΓòÉΓòÉΓòÉ

 pText (PSTRL)
    Null-terminated text string.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_INSERT ΓòÉΓòÉΓòÉ

 ulCount (ULONG)
     Number of bytes actually inserted.


ΓòÉΓòÉΓòÉ <hidden> pText ΓòÉΓòÉΓòÉ

 pText (PSTRL)
    Null-terminated text string.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulCount ΓòÉΓòÉΓòÉ

 ulCount (ULONG)
     Number of bytes actually inserted.


ΓòÉΓòÉΓòÉ 14.2.8. MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

Cause:

This message returns the line number corresponding to a given VISUAL insertion
point.

Parameters:

param1
    IPT   iptFirst VISUAL insertion point of interest

param2
    ULONG param2   Reserved.

returns
    LONG  lLineNum Line number of insertion point.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

For any visual insertion point, the corresponding line number is returned.  If
the insertion point is -1, the number of the line containing the first
insertion point of the visual selection is returned.

The term line means a line on the display after the application of word-wrap.
It does not mean a line as defined by the CR LF line-break sequence.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
lLineNum to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

 iptFirst (IPT)
    Visual insertion point of interest.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_LINEFROMCHAR ΓòÉΓòÉΓòÉ

 lLineNum (LONG)
    Line number of visual insertion point.


ΓòÉΓòÉΓòÉ <hidden> iptFirst ΓòÉΓòÉΓòÉ

 iptFirst (IPT)
    Visual insertion point of interest.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> lLineNum ΓòÉΓòÉΓòÉ

 lLineNum (LONG)
    Line number of visual insertion point.


ΓòÉΓòÉΓòÉ 14.2.9. MLM_PASTE ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_PASTE ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_PASTE ΓòÉΓòÉΓòÉ

Cause:

This message replaces the text that forms the current VISUAL selection, with
text from the clipboard. When the text type of the MLE is implicit, the
characters affected may not necessarily be adjacent in the text buffer : the
action is taken on the visually selected text which is continous on the screen.

Parameters:

param1
    ULONG param1 Reserved.

param2
    ULONG param2 Reserved.

returns
    ULONG ulCopy Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_PASTE ΓòÉΓòÉΓòÉ

The multi-line entry field control window procedure responds to this message by
replacing the selected text with text from the clipboard.  The text is
translated from standard clipboard format, which is the same as importing with
MLE_CFTEXT format.

The text is assumed to be in the clipboard as a single contiguous data segment.
This restricts the amount to the maximum segment size (64Kb).

This can cause an overflow, see MLN_OVERFLOW.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_PASTE ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulCopy to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_PASTE ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_PASTE ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulCopy ΓòÉΓòÉΓòÉ

 ulCopy (ULONG)
    Number of bytes transferred, counted in CF_TEXT format.


ΓòÉΓòÉΓòÉ 14.2.10. MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

Cause:

This message returns the number of bytes to end of line after formatting has
been applied.

Parameters:

param1
    IPT   iptStart VISUAL insertion point to count from.

param2
    ULONG param2   Reserved.

returns
    IPT   iptLine  Count of bytes to end of line.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

For any insertion point, the number of bytes between that insertion point and
the end of the line is returned, after the current formatting is applied. This
is done visually not logically. If the insertion point is -1, the cursor
position is used.  This message differs from MLM_QUERYLINELENGTH in that the
byte count returned reflects the effects of the current formatting set by
MLM_FORMAT.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
iptLine to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Insertion point to count from.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_QUERYFORMATLINELENGTH ΓòÉΓòÉΓòÉ

 iptLine (IPT)
    Count of bytes to end of line.


ΓòÉΓòÉΓòÉ <hidden> iptStart ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Visual insertion point to count from.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> iptLine ΓòÉΓòÉΓòÉ

 iptLine (IPT)
    Count of bytes to end of line.


ΓòÉΓòÉΓòÉ 14.2.11. MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

Cause:

This message returns the length of a specified range of characters after the
current formatting has been applied.

Parameters:

param1
    IPT   iptStart VISUAL insertion point to start from.

param2
    ULONG ulScan   Number of characters to convert to bytes.

returns
    ULONG ulText   Count of bytes in text after formatting.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

This message returns the length in bytes of a range of characters after the
current formatting is applied. This is done visually not logically. This
differs from MLM_QUERYTEXTLENGTH in that:

   o  A range of insertion points can be queried.
   o  The byte count returned reflects the effects of the current formatting
      set by MLM_FORMAT.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulText to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Insertion point to start from.

 ulScan (ULONG)
    Number of characters to convert to bytes.

      0xFFFFFFFF
         Convert until end of line

      other
         Convert specified number of characters.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_QUERYFORMATTEXTLENGTH ΓòÉΓòÉΓòÉ

 ulText (ULONG)
    Count of bytes in text after formatting.


ΓòÉΓòÉΓòÉ <hidden> iptStart ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Insertion point to start from.


ΓòÉΓòÉΓòÉ <hidden> ulScan ΓòÉΓòÉΓòÉ

 ulScan (ULONG)
    Number of characters to convert to bytes.

      0xFFFFFFFF
         Convert until end of line

      other
         Convert specified number of characters.


ΓòÉΓòÉΓòÉ <hidden> ulText ΓòÉΓòÉΓòÉ

 ulText (ULONG)
    Count of bytes in text after formatting.


ΓòÉΓòÉΓòÉ 14.2.12. MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

Cause:

This message returns the number of bytes between a given insertion point and
the end of line.

Parameters:

param1
    IPT   iptStart VISUAL insertion point to count from.

param2
    ULONG param2   Reserved.

returns
    IPT   iptLine  Count of bytes to end of line.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

For any insertion point, the number of bytes between that insertion point and
the end of the line is returned. The visual, not logical, insertion point is
used. If the insertion point is -1, the cursor position is used. If the line
contains a hard line-break, it is counted as one byte.

The term line means a line on the display after the application of word-wrap.
It does not mean a line as defined by the CR LF line-break sequence.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
iptLine to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Insertion point to count from.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_QUERYLINELENGTH ΓòÉΓòÉΓòÉ

 iptLine (IPT)
    Count of bytes to end of line.


ΓòÉΓòÉΓòÉ <hidden> iptStart ΓòÉΓòÉΓòÉ

 iptStart (IPT)
    Insertion point to count from.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> iptLine ΓòÉΓòÉΓòÉ

 iptLine (IPT)
    Count of bytes to end of line.


ΓòÉΓòÉΓòÉ 14.2.13. MLM_QUERYSEL ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

Cause:

  This message returns the location of the VISUAL selection.

Parameters:

param1
    USHORT usQueryMode Query Mode.

param2
    ULONG  param2      Reserved.

returns
    SHORT  sMinSel     Minimum visual insertion point of selection.
    SHORT  sMaxSel     Maximum visual insertion point of selection.
    IPT    iptipt      Requested visual insertion point.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

This message returns the location of the visual selection in several different
forms. The insertion points lie between characters, and start at a zero origin
before the first character in the MLE.  Subtracting the minimum from the
maximum gives the number of characters in the selection. This is not
necessarily the number of bytes of ASCII. The line-break character is a CR LF
(2 bytes) and all DBCS characters are 2 bytes.  To determine the number of
bytes, use MLM_QUERYFORMATTEXTLENGTH, being sure that the format choice set by
MLM_FORMAT is set to what is used when the data is exported from the MLE (for
example, MLE_CFTEXT for MLM_QUERYSELTEXT).

Note the following:

   o  If anchor point > cursor point, minimum point = cursor point and maximum
      point = anchor point.
   o  If anchor point < cursor point, minimum point = anchor point and maximum
      point = cursor point.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
reply to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

 usQueryMode (USHORT)
    Query Mode.

      MLFQS_MINMAXSEL
         Return both minimum and maximum visual points of selection in a format
         compatible with the EM_QUERYSEL message.

      MLFQS_MINSEL
         Return minimum visual insertion point of selection.

      MLFQS_MAXSEL
         Return maximum visual insertion point of selection.

      MLFQS_ANCHORSEL
         Return visual anchor point of selection.

      MLFQS_CURSORSEL
         Return visual cursor point of selection.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_QUERYSEL ΓòÉΓòÉΓòÉ

 sMinSel (SHORT)
    Minimum visual insertion point of selection.

    This value is rounded down to 65 535, if necessary.

 sMaxSel (SHORT)
    Maximum visual insertion point of selection.

    This value is rounded down to 65 535 if necessary.
 For usQueryMode = MLFQS_MINSEL, MLFQS_MAXSEL, MLFQS_ANCHORSEL, or
 MLFQS_CURSORSEL:

    iptipt (IPT)
    Requested visual insertion point.


ΓòÉΓòÉΓòÉ <hidden> usQueryMode ΓòÉΓòÉΓòÉ

 usQueryMode (USHORT)
    Query Mode.

      MLFQS_MINMAXSEL
         Return both minimum and maximum visual points of selection in a format
         compatible with the EM_QUERYSEL message.

      MLFQS_MINSEL
         Return minimum visual insertion point of selection.

      MLFQS_MAXSEL
         Return maximum visual insertion point of selection.

      MLFQS_ANCHORSEL
         Return visual anchor point of selection.

      MLFQS_CURSORSEL
         Return visual cursor point of selection.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> sMinSel ΓòÉΓòÉΓòÉ

 sMinSel (SHORT)
    Minimum visual insertion point of selection.

    This value is rounded down to 65 535, if necessary.


ΓòÉΓòÉΓòÉ <hidden> sMaxSel ΓòÉΓòÉΓòÉ

 sMaxSel (SHORT)
    Maximum visual insertion point of selection.

    This value is rounded down to 65 535 if necessary.
 For usQueryMode = MLFQS_MINSEL, MLFQS_MAXSEL, MLFQS_ANCHORSEL, or
 MLFQS_CURSORSEL:


ΓòÉΓòÉΓòÉ <hidden> iptipt ΓòÉΓòÉΓòÉ

    iptipt (IPT)
    Requested visual insertion point.


ΓòÉΓòÉΓòÉ 14.2.14. MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

Cause:

This message copies the currently VISUALLY selected text into a logical buffer.

Parameters:

param1
    PSTRL pBuff   Logical buffer for text string.

param2
    ULONG param2  Reserved.

returns
    ULONG ulCount Number of bytes to put into text string.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

This message copies the current VISUALLY selected text into the logical buffer
pointed to by pBuff.  The text string is null-terminated.  The byte count
includes the text in CF_TEXT format (CR LF) and the null terminator.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
ulCount to 0.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

 pBuff (PSTRL)
    Logical buffer for text string.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_QUERYSELTEXT ΓòÉΓòÉΓòÉ

 ulCount (ULONG)
    Number of bytes to put into text string.


ΓòÉΓòÉΓòÉ <hidden> pBuff ΓòÉΓòÉΓòÉ

 pBuff (PSTRL)
    Logical buffer for text string.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> ulCount ΓòÉΓòÉΓòÉ

 ulCount (ULONG)
    Number of bytes to put into text string.


ΓòÉΓòÉΓòÉ 14.2.15. MLM_SEARCH ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_SEARCH ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_SEARCH ΓòÉΓòÉΓòÉ

Cause:

This message searches for a specified text string.

Parameters:

param1
    ULONG           ulStyle  Style flags.

param2
    PMLE_SEARCHDATA pse      Search specification structure.

returns
    BOOL            fSuccess Success indicator.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_SEARCH ΓòÉΓòÉΓòÉ

This message searches the MLE text for a specified string, starting at a
specified insertion point and continuing until the second specified insertion
point has been reached, or the requested string has been matched.

When an MLM_SEARCH message is sent, the text is scanned starting with the
character that follows the insertion point indicated in the iptStart field of
the MLE_SEARCHDATA structure.  The search proceeds until the point indicated in
the iptStop field, until a match is found, or until TRUE is returned from
MLN_SEARCHPAUSE notification (see WM_CONTROL (in Multiline Entry Fields)). If a
negative value is specified for the iptStart, the current cursor point is used.
If a negative value is specified for iptStop, the end of the text is used.  If
iptStop, is less than or equal to iptStart, after performing the two indicated
substitutions, the search wraps from the end of the text to the beginning of
the text.

If the MLFSEARCH_CASESENSITIVE option is specified, the bytes of the search
string must exactly match those in the text.  If MLFSEARCH_CASESENSITIVE is not
specified, the WinUpperChar of the search string must match the WinUpperChar of
the text.

When a match is found, the iptStart field of the search specification structure
is set to indicate the insertion point immediately preceding the first
character of the match, and the cchFind field is set to indicate the number of
characters in the match.  The cursor selection is not altered unless
MLFSEARCH_SELECTMATCH is specified.  If it is, an MLM_SETSEL is done with the
anchor point at iptStart and the cursor at iptStart + cchFind.

While searching, the MLE occasionally sends an MLN_SEARCHPAUSE notification
message.  If the owner responds to this message with the value TRUE, the MLE
stops the search. When a search is stopped from MLN_SEARCHPAUSE, iptStart is
set to the point where the search terminated. If the response is FALSE, the
search continues (see also the definition of MLN_SEARCHPAUSE). The interval at
which MLN_SEARCHPAUSE notifications are sent is implementation-dependent, but
must not exceed reasonable user-response thresholds, nor should it be so often
as to introduce undue messaging overhead. Sending this notification every half
second is a reasonable compromise.

When no match is found the iptStart value is unchanged.

If the application needs to continue the search, the proper way is to change
the iptStart value to be the point following the string found, adjusting for
any text changes done after the search that may have moved the relative
location of the point.

Applications using this message are advised to change the system pointer to the
wait icon (clock face) if it is expected that the search will take some time.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_SEARCH ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
fSuccess to FALSE.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_SEARCH ΓòÉΓòÉΓòÉ

 ulStyle (ULONG)
    Style flags.

      MLFSEARCH_CASESENSITIVE
         If set, only exact matches are considered a successful match.  If not
         set, any case-combination of the correct characters in the correct
         sequence is considered a successful match.

      MLFSEARCH_SELECTMATCH
         If set, the MLE selects the text and scrolls it into view when found,
         just as if the application had sent an MLM_SETSEL message.  This is
         not done if MLFSEARCH_CHANGEALL is also indicated.

      MLFSEARCH_CHANGEALL
         Using the MLE_SEARCHDATA structure specified in pse, all occurrences
         of pchFind are found, searching from iptStart to iptStop, and
         replacing them with pchReplace. If this style is selected, the
         cchFound field has no meaning, and the iptStart value points to the
         place where the search stopped, or is the same as iptStop because the
         search has not been stopped at any of the found strings. The current
         cursor location is not moved.  However, any existing selection is
         deselected.

 pse (PMLE_SEARCHDATA)
    Search specification structure.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_SEARCH ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.

      TRUE
         The search was successful.

      FALSE
         The search was unsuccessful.


ΓòÉΓòÉΓòÉ <hidden> ulStyle ΓòÉΓòÉΓòÉ

 ulStyle (ULONG)
    Style flags.

      MLFSEARCH_CASESENSITIVE
         If set, only exact matches are considered a successful match.  If not
         set, any case-combination of the correct characters in the correct
         sequence is considered a successful match.

      MLFSEARCH_SELECTMATCH
         If set, the MLE selects the text and scrolls it into view when found,
         just as if the application had sent an MLM_SETSEL message.  This is
         not done if MLFSEARCH_CHANGEALL is also indicated.

      MLFSEARCH_CHANGEALL
         Using the MLE_SEARCHDATA structure specified in pse, all occurrences
         of pchFind are found, searching from iptStart to iptStop, and
         replacing them with pchReplace. If this style is selected, the
         cchFound field has no meaning, and the iptStart value points to the
         place where the search stopped, or is the same as iptStop because the
         search has not been stopped at any of the found strings. The current
         cursor location is not moved.  However, any existing selection is
         deselected.


ΓòÉΓòÉΓòÉ <hidden> pse ΓòÉΓòÉΓòÉ

 pse (PMLE_SEARCHDATA)
    Search specification structure.


ΓòÉΓòÉΓòÉ <hidden> fSuccess ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.

      TRUE
         The search was successful.

      FALSE
         The search was unsuccessful.


ΓòÉΓòÉΓòÉ 14.2.16. MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

Cause:

This message sets the first visible character.

Parameters:

param1
    IPT   iptFVC   Visual insertion point to place in top left-hand corner.

param2
    ULONG param2   Reserved.

returns
    BOOL  fSuccess Success indicator.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

This message scrolls the text to place the character following the insertion
point into the upper left-hand corner of the window. If the insertion point
specified is beyond the end of a line, or the end of the file, it is resolved
in the same way as it is for a mouse click.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
fSuccess to FALSE.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

 iptFVC (IPT)
    Visual insertion point to place in top left-hand corner.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_SETFIRSTCHAR ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.

      TRUE
         Successful completion

      FALSE
         An error occurred.


ΓòÉΓòÉΓòÉ <hidden> iptFVC ΓòÉΓòÉΓòÉ

 iptFVC (IPT)
    Visual insertion point to place in top left-hand corner.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> fSuccess ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.

      TRUE
         Successful completion

      FALSE
         An error occurred.


ΓòÉΓòÉΓòÉ 14.2.17. MLM_SETSEL ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - MLM_SETSEL ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> Main - MLM_SETSEL ΓòÉΓòÉΓòÉ

Cause:

This message sets a VISUAL selection.

Parameters:

param1
    IPT  iptAnchor Visual insertion point for new visual anchor point.

param2
    IPT  iptCursor Visual insertion point for new visual cursor point.

returns
    BOOL fSuccess  Success indicator.


ΓòÉΓòÉΓòÉ <hidden> Notes - MLM_SETSEL ΓòÉΓòÉΓòÉ

This message sets the visual anchor and visual cursor points. The screen
display is updated appropriately, ensuring that the cursor point is visible
(which may involve scrolling).  Note that the text cursor and inversion are not
displayed if the MLE window does not have the input focus.  A negative value
for a point leaves that point alone.


ΓòÉΓòÉΓòÉ <hidden> Default Processing - MLM_SETSEL ΓòÉΓòÉΓòÉ

The default window procedure takes no action on this message, other than to set
fSuccess to FALSE.


ΓòÉΓòÉΓòÉ <hidden> Parameters - MLM_SETSEL ΓòÉΓòÉΓòÉ

 iptAnchor (IPT)
    Visual insertion point for new visual anchor point.

 iptCursor (IPT)
    Visual insertion point for new visual cursor point.


ΓòÉΓòÉΓòÉ <hidden> Return Values - MLM_SETSEL ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> iptAnchor ΓòÉΓòÉΓòÉ

 iptAnchor (IPT)
    Visual insertion point for new visual anchor point.


ΓòÉΓòÉΓòÉ <hidden> iptCursor ΓòÉΓòÉΓòÉ

 iptCursor (IPT)
    Visual insertion point for new visual cursor point.


ΓòÉΓòÉΓòÉ <hidden> fSuccess ΓòÉΓòÉΓòÉ

 fSuccess (BOOL)
    Success indicator.


ΓòÉΓòÉΓòÉ 14.3. Notebook control ΓòÉΓòÉΓòÉ

Processing of Notebook control messages in the PM Bidirectional environment is
the same as in the non-bidirectional PM environment. However, the Notebook
control is sensitive to its Bidirectional attributes and handles formatting and
presentation accordingly.

When the notebook control has right to left window orientation, the page arrows
have their roles reversed: the left arrow turns the pages forward, whereas the
right one turns them backwards. The text of tabs is converted according to
their bidi attributes.

The WM_SETBIDIATTR dynamicaly modifies the bidi attributes (and as a result -
the appearance) of the notebook control. It will also send appropriate messages
to the user-defined page windows.


ΓòÉΓòÉΓòÉ 14.3.1. BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message queries the bidi attribute of the status line text.

Parameters:


param1
    ULONG      ulPageId    Page ID.

param2
    PULONG     pBidiAttr     Pointer.

returns
    BOOL       fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose status line text is requested.

 pBidiAttr (PULONG)
    Pointer.

    Pointer to a BIDIATTR data structure where the statusline bidi attributes
    are returned.


ΓòÉΓòÉΓòÉ <hidden> ulpageID ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose status line text is requested.


ΓòÉΓòÉΓòÉ <hidden> pBidiAttr ΓòÉΓòÉΓòÉ

 pBidiAttr (PULONG)
    Pointer.

    Pointer to a BIDIATTR data structure defining the status line text.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the notebook status line succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the notebook status line succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 This is the main expl.of cm NOTES


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - BKM_QUERYSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.3.2. BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message queries the bidi attribute of the tab text.

Parameters:


param1
    ULONG    ulPageID    Page ID.

param2
    PULONG   pBidiAttr     Pointer.

returns
    BOOL     fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - BKM_QUERYTABTEXTBIDIATTRR ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose tab text is queried for Bidi attributes.

 pBidiAttr (PULONG)
    Pointer.

    Pointer to a BIDIATTR data structure where the bidirectional attributes of
    the tab text are returned.


ΓòÉΓòÉΓòÉ <hidden> ulpageID ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose tab text is queried for bidirectional
    attributes.


ΓòÉΓòÉΓòÉ <hidden> pBidiAttr ΓòÉΓòÉΓòÉ

 pBidiAttr (PULONG)
    Pointer.

    Pointer to a BIDIATTR data structure where the bidirectional attributes of
    the tab text are returned.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the notebook tab text bidirectional attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the notebook tab text bidirectional attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

The mnemonic specified should treat all Arabic shapes in the same way. They
should normalize both the typed key and the character in the TAB text to their
"base shapes". This processing should be the same as done in the menu control.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - BKM_QUERYTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.3.3. BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message sets the bidi attribute for a specific status line.

Parameters:


param1
    ULONG           ulPageID       Page ID.

param2
    PBD_ATTR_MASK   pBD_Attr_Mask  Pointer.

returns
    BOOL            fsuccess       Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page with which to associate the text string.

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure defining the bidirectional
    attributes to be set.


ΓòÉΓòÉΓòÉ <hidden> ulpageID ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose status line text is assigned with the new
    bidirectional attributes.


ΓòÉΓòÉΓòÉ <hidden> pBD_Attr_Mask ΓòÉΓòÉΓòÉ

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure containing the bidirectional
    attributes.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the notebook status line bidirectional attributes
         succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the notebook status line bidirectional attributes
         succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - BKM_SETSTATUSLINEBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.3.4. BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message sets the bidi attribute for a specific tab text.

Parameters:


param1
    ULONG            ulPageID       Page ID.

param2
    PBD_ATTR_MASK    pBD_Attr_Mask  Pointer.

returns
    BOOL             fsuccess       Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose tab text is assigned with new
    bidirectional attributes.

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure containing the new bidirectional
    attributes.


ΓòÉΓòÉΓòÉ <hidden> ulpageID ΓòÉΓòÉΓòÉ

 ulpageID (ULONG)
    Page ID.

    Page identifier of the page whose tab text is assigned with the new
    bidirectional attributes.


ΓòÉΓòÉΓòÉ <hidden> pBD_Attr_Mask ΓòÉΓòÉΓòÉ

 pBD_Attr_Mask (PBD_ATTR_MASK)
    Pointer.

    Pointer to the BD_ATTR_MASK data structure containte the new bidirectional
    attributes.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the notebook tab text bidirectional attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the notebook tab text bidirectional attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

The mnemonic specified should treat all Arabic shapes in the same way. They
should normalize both the typed key and the character in the TAB text to their
"base shapes". This processing should be the same as done in the menu control.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - BKM_SETTABTEXTBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.3.5. BKM_QUERYPAGEINFO ΓòÉΓòÉΓòÉ

The mp2 parameter of this message points to a BOOKPAGEINFO data structure. The
pBidiInfo field in this data structure points to the BOOKPAGEBIDIINFO
structure.

The "fl" field of the BOOKPAGEINFO structure must have the BFA_BIDIINFO flag
set to indicate that Bidi Attributes of the MajorTab/MinorTab/Status line text
(as indicated by the other flags in the "fl" field) are queried.


ΓòÉΓòÉΓòÉ 14.3.6. BKM_SETPAGEINFO ΓòÉΓòÉΓòÉ

The mp2 parameter of this message points to a BOOKPAGEINFO data structure. The
pBidiInfo field in this data structure points to the BOOKPAGEBIDIINFO
structure.

The "fl" field of the BOOKPAGEINFO structure must have the BFA_BIDIINFO flag
set to indicate that Bidi Attributes contained in the BOOKPAGEBIDIINFO
structure are to be set for the Major Tab/Minor Tab/Status Line as indicated by
the other flags set in this field.


ΓòÉΓòÉΓòÉ 14.4. Value Set control ΓòÉΓòÉΓòÉ

Processing of the Value-Set control messages in the PM Bidirectional
environment is the same as in the non-bidirectional PM environemnt. However,
the Value-Set control is sensitive to its Bidirectional attributes and handles
formatting and presentation accordingly.


ΓòÉΓòÉΓòÉ 14.4.1. VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 Cause:

This message queries the bidi attributes for each text item in an application.

Parameters:


param1
     USHORT         usRow          Row index.
     USHORT         usColumn       Column index.

param2
     PULONG         pBidiAttr      Pointer.

returns
     BOOL           fsuccess       Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usRow  (USHORT)
    Row index.

    Row index of the items to be queried. Rows have a value from 1 to
    usRowCount field. This value, which is the total number of rows in the
    value set, is specified in the VSCDATA data structure when the value set
    control is created.

 usColumn  (USHORT)
    Column index.

    Column index of the items to be queried. Columns have a value from 1 to
    usColumnCount field. This value, which is the total number of columns in
    the value set, is specified in the VSCDATA data structure when the value
    set control is created.

 pBidiAttr(PULONG)
    Pointer.

    pointer to the BIDIATTR structure.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usRow  (USHORT)
    Row index.

    Row index of the items to be queried. Rows have a value from 1 to
    usRowCount field. This value, which is the total number of rows in the
    value set, is specified in the VSCDATA data structure when the value set
    control is created.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usColumn  (USHORT)
    Column index.

    Column index of the items to be queried. Columns have a value from 1 to
    usColumnCount field. This value, which is the total number of columns in
    the value set, is specified in the VSCDATA data structure when the value
    set control is created.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 pBidiAttr(PULONG)
    Pointer.

    pointer to the BIDIATTR structure.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the item bidi attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the item bidi attributes succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 If item bidi attribute is not set (BDA_INIT is 0) the behavior is defined
(inherited)  from the bidi attributes of the valueset.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - VM_QUERYITEMBIDIATTR ΓòÉΓòÉΓòÉ

 The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.4.2. VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 Cause:

This message sets the bidi attributes for each text item in an application.

Parameters:


param1
     USHORT    usRow     Row index.
     USHORT    usColumn  Column index.

param2
     ULONG     param2    Reserved.

returns
     BOOL      fsuccess  Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usRow  (USHORT)
    Row index.

    Row index of the value set item for which information is being specified.
    Rows have a value from 1 to usRowCount field. This value, which is the
    total number of rows in the value set, is specified in the VSCDATA data
    structure when the value set control is created.

 usColumn  (USHORT)
    Column index.

    Column index of the value set item for which information is being
    specified. Columns have a value from 1 to usColumnCount field. This value,
    which is the total number of columns in the value set, is specified in the
    VSCDATA data structure when the value set control is created.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usRow  (USHORT)
    Row index.

    Row index of the value set item for which information is being specified.
    Rows have a value from 1 to usRowCount field. This value, which is the
    total number of rows in the value set, is specified in the VSCDATA data
    structure when the value set control is created.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 usColumn  (USHORT)
    Column index.

    Column index of the value set item for which information is being
    specified. Columns have a value from 1 to usColumnCount field. This value,
    which is the total number of columns in the value set, is specified in the
    VSCDATA data structure when the value set control is created.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the bidi attribute succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Setting of the bidi attribute succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

 If item bidi attribute is not set (BDA_INIT is 0) the behavior is defined
(inherited)  from the bidi attributes of the valueset.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - VM_SETITEMBIDIATTR ΓòÉΓòÉΓòÉ

The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.5. General Bidi Window Messages ΓòÉΓòÉΓòÉ

Processing of general window messages in the PM Bidirectional environment is
the same as in the non-bidirectional PM environemnt.


ΓòÉΓòÉΓòÉ 14.5.1. WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

 Cause:

This message is posted to the viewer to notify it that the language options
configuration dialog for a certain window should be invoked.

Parameters:


param1
     HWND       Whwnd       Window handle.

param2
     ULONG      param2      Reserved.

returns
     BOOL       fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

 Whwnd (HWND)
    Window handle.

    This contains the window handle of the window whose language options are to
    be configured.

 param2 (ULONG)
    Reserved.

      1
         Reserved value, 1, for bidi.


ΓòÉΓòÉΓòÉ <hidden> Whwnd ΓòÉΓòÉΓòÉ

 Whwnd (HWND)
    This contains the window handle of the window whose language options are to
    be configured.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Changes in the bidi viewer succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Changes in the bidi viewer succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

This message may be posted when the user wishes to invoke the languages option
dialog using bidi key combinations.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_LANG_OPTIONS_DIALOG ΓòÉΓòÉΓòÉ

The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.5.2. WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

 Cause:

This message is sent by the system to notify the active language viewer window
of the changes in the 'Bidi stat'.

Parameters:


param1
     ULONG      ulnotify    Type definition.

param2
     ULONG      param2      Reserved.

returns
     BOOL       fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

 ulnotify (ULONG)
    Type definition.

    This contains the value of the type of event that has taken place and which
    is notified to the viewer.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 ulnotify (ULONG)
    This contains the value of the type of event that has taken place and which
    is notified to the viewer.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Changes in the bidi viewer succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Changes in the bidi viewer succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

The first parameter of this message defines the type of event that has taken
place and which is notified to the bidi viewer.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_LANGVIEWINFOCHANGED ΓòÉΓòÉΓòÉ

The Default window procedure does not expect to receive this message and
therefore takes no action on it other than to return FALSE


ΓòÉΓòÉΓòÉ 14.5.3. WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

Cause:

This message is sent to a window procedure to query its bidi attributes.

Parameters:


param1
     ULONG     param1      Reserved.

param2
     ULONG     param2      Reserved.

returns
     BOOL      fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi attribute succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi attribute succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

This message  is sent to a window procedure to query it's bidi attributes. This
is done as part of WinQueryLangInfo processing.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_QUERYBIDIATTR ΓòÉΓòÉΓòÉ

The Default window procedure returns the window bidi attributes, whose values
are contained in the BIDIATTR.


ΓòÉΓòÉΓòÉ 14.5.4. WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

Cause:

This message is sent to a window procedure to query its bidi status.

Parameters:


param1
     ULONG       param1      Reserved.

param2
     ULONG       param2      Reserved.

returns
     BOOL        fsuccess    Success indicator.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi status succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 param1 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 param2 (ULONG)
    Reserved.

      0
         Reserved value, 0.


ΓòÉΓòÉΓòÉ <hidden> fsuccess ΓòÉΓòÉΓòÉ

 fSuccess(BOOL)
    Success indicator.

      TRUE
         Query of the bidi status succeeded.

      FALSE
         An error occurred. The WinGetLastError function may return the
         following error:

        o  PMERR_INVALID_PARAMETERS


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

This message is sent to a window procedure to query it's bidi status (these
values are contained in the BIDI_STAT). This is done as part of
WinQueryLangInfo processing.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_QUERYBIDISTAT ΓòÉΓòÉΓòÉ

The Default window procedure returns the window Bidi status (these values are
contained in the BIDI_STAT).


ΓòÉΓòÉΓòÉ 14.5.5. WM_SETBIDIATTR ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

 Cause:

This message is sent to a window procedure to notify it that the bidi
attributes of that window are about to be changed.

Parameters:


param1
    ULONG   ulData     Attribute data.

param2
    ULONG   ulMask     Value mask.

returns
    ULONG   fresult    Result value.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

 ulData  (ULONG)
    Attribute data.

    The value of the specified fields to be set in the Bidi attributes. These
    values are contained in the BIDIATTR.

 ulMask  (ULONG)
    Value Mask.

    A mask value that is used to indicate which fields, in the Bidi attributes
    structure have to be set. Only the bits that are set in ulMask (see
    BIDIATTRM), are enabled for update by the values in ulData.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 ulData  (ULONG)
    Attribute data.

    The value of the specified fields to be set in the Bidi attributes. These
    values are contained in the BIDIATTR.


ΓòÉΓòÉΓòÉ <hidden> param2 ΓòÉΓòÉΓòÉ

 ulMask  (ULONG)
    Value mask.

    A mask value that is used to indicate which fields, in the Bidi attributes
    structure have to be set. Only the bits that are set in ulMask (see
    BIDIATTRM), are enabled for update by the values in ulData.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

 fresult(ULONG)
    Result indicator.

      SBI_MSG_NOT_PROCESSED:
         This message notifies the sender that the message has NOT been
         processed by the window procedure. This is returned from the default
         window procedure.

      SBI_MSG_PROCESSED:
         This message notifies the sender that the message has been processed
         by the window procedure.

      SBI_MSG_PROCESSED_SELF:
         This message notifies the sender that the window procedure has
         processed the message for itself, but it leaves it for the sender to
         determine the processing that has to be done for children.


ΓòÉΓòÉΓòÉ <hidden> fresult ΓòÉΓòÉΓòÉ

 fresult(ULONG)
    Result indicator.

      SBI_MSG_NOT_PROCESSED:
         This message notifies the sender that the message has NOT been
         processed by the window procedure.  This is returned from the default
         window procedure.

      SBI_MSG_PROCESSED:
         This message notifies the sender that the message has been processed
         by the window procedure.

      SBI_MSG_PROCESSED_SELF:
         This message notifies the sender that the window procedure has
         processed the message for itself, but  it leaves it for the sender to
         determine the processing that has to be done for children.


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

The message gives the window procedure a chance to ignore the request, set the
attributes itself, or let the system default processing handle the operation
for it.

It is optionaly sent to a window procedure when the bidi attributes of this
window are about to be changed (the value is the BIDIATTR). This is done as
part of WinQueryLangInfo processing.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_SETBIDIATTR ΓòÉΓòÉΓòÉ

 When the WinSetLangInfo function sends this message,  the default window
returns  SBI_MSG_NOT_PROCESSED which causes  WinQueryLangInfo  to set the Bidi
Attributes  by itself  (the value is contained in the BIDIATTR).


ΓòÉΓòÉΓòÉ 14.5.6. WM_SETBIDISTAT ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

Select an item:

      Main Panel
      Parameters
      Return Values
      Notes
      Default Processing


ΓòÉΓòÉΓòÉ <hidden> MAIN - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

 Cause:

This message is sent to a window procedure to notify it that the bidi status of
that window is about to be changed.

Parameters:


param1
    ULONG    ulData     Attribute data.

param2
    ULONG    ulMask     Value mask.

returns
    ULONG    fresult    Result value.


ΓòÉΓòÉΓòÉ <hidden> PARAMETERS - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

 ulData  (ULONG)
    Attribute data.

    The value of the specified fields to be set in the Bidi status. These
    values are contained in the BIDISTAT.

 ulMask (ULONG)
    Value Mask.

    A mask value that is used to indicate which fields, in the Bidi status
    structure have to be set. Only the bits that are set in ulMask (see
    BIDISTATM), are enabled for update by the values in ulData.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 ulData  (ULONG)
    Attribute data.

    The value of the specified fields to be set in the Bidi status. These
    values are contained in the BIDISTAT.


ΓòÉΓòÉΓòÉ <hidden> param1 ΓòÉΓòÉΓòÉ

 ulMask (ULONG)
    Value mask.

    A mask value that is used to indicate which fields, in the Bidi status
    structure have to be set. Only the bits that are set in ulMask (see
    BIDISTATM), are enabled for update by the values in ulData.


ΓòÉΓòÉΓòÉ <hidden> RETURN VALUES - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

 fresult(ULONG)
    Result indicator.

      SBI_MSG_NOT_PROCESSED:
         This message notifies the sender that the message has NOT been
         processed by the window procedure.  This is returned from the default
         window procedure.

      SBI_MSG_PROCESSED:
         This message notifies the sender that the message has been processed
         by the window procedure.

      SBI_MSG_PROCESSED_SELF:
         This message notifies the sender that the window procedure has
         processed the message for itself, but  it leaves it for the sender to
         determine the processing that has to be done for children.


ΓòÉΓòÉΓòÉ <hidden> fresult ΓòÉΓòÉΓòÉ

 fresult(ULONG)
    Result indicator.

      SBI_MSG_NOT_PROCESSED:
         This message notifies the sender that the message has NOT been
         processed by the window procedure.  This is returned from the default
         window procedure.

      SBI_MSG_PROCESSED:
         This message notifies the sender that the message has been processed
         by the window procedure.

      SBI_MSG_PROCESSED_SELF:
         This message notifies the sender that the window procedure has
         processed the message for itself, but  it leaves it for the sender to
         determine the processing that has to be done for children.


ΓòÉΓòÉΓòÉ <hidden> NOTES - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

The message gives the window procedure a chance to ignore the request, set the
status itself, or let the system default processing handle the operation for
it.

It is optionaly sent to a window procedure when the bidi status of this window
are about to be changed (the value is contained in the BIDI_STAT). This is done
as part of WinQueryLangInfo processing.


ΓòÉΓòÉΓòÉ <hidden> DEFAULT PROCESSING - WM_SETBIDISTAT ΓòÉΓòÉΓòÉ

 When the WinSetLangInfo function sends this message,  the default window
procedure returns  SBI_MSG_NOT_PROCESSED which causes WinSetLangInfo to set the
Bidi Status by  itself. (the value is contained in the  BIDI_STAT).


ΓòÉΓòÉΓòÉ 15. Bidirectional Support Window Functions ΓòÉΓòÉΓòÉ

This section contains an alphabetical list of the functions which are available
for controlling windows. These functions enable an application to create, size,
move, and control windows and their contents in the Bidirectional programming
environment.

See the OS/2 Programming Guide, Volume II for details on commom programming
techniques for managing the window environment, in general.


ΓòÉΓòÉΓòÉ <hidden> Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

 Select an item:

      Function Syntax
      Parameters
      Return Values
      Example


ΓòÉΓòÉΓòÉ <hidden> Syntax - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

/********************************************/
/* This function returns a flag to classify */
/* the given codepage.                      */
/********************************************/

#define INCL_PMBIDI
#include <os2.h>

ULONG     codepage;     /* Codepage value */
ULONG     cp;           /* Return value   */

   cp  =  Win_BD_ClassifyCodepage ( codepage );


ΓòÉΓòÉΓòÉ <hidden> Parameters - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

 codepage  (ULONG) - input
    code page.

    The value of the code page to be classified.


ΓòÉΓòÉΓòÉ <hidden> Return Values - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

 cp  (ULONG) - return
    Code page indicator.

 OL
    A none Bidi code page.

 CP_IS_BIDI
    The code page is bidi. The following are possible values:

      CP_IS_ARABIC
         The code page is Arabic.
      CP_IS_ARABIC2
         The code page is Arabic 2.


ΓòÉΓòÉΓòÉ <hidden> Errors - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Example - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

to be added


ΓòÉΓòÉΓòÉ <hidden> Related Functions - Win_BD_ClassifyCodepage ΓòÉΓòÉΓòÉ

 Related Functions

   o  There are no related functions.


ΓòÉΓòÉΓòÉ <hidden> Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

/******************************************/
/* This function checks if a string is an */
/* 'AllBidi' string.                      */
/******************************************/

#define INCL_PMBIDI
#include <os2.h>

PCHAR     pch;          /* Input string */
ULONG     ulMaxlen;     /* Number of characters */
ULONG     allBidi;      /* Return value   */

   allBidi  =  Win_BD_IsStringAllBidi ( pch, ulMaxlen );


ΓòÉΓòÉΓòÉ <hidden> Parameters - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

 pch  (PCHAR) - input
    Input string.

    The input string to be checked.

 ulMaxlen  (ULONG) - input
    Number of characters.

    The number of characters in the string to be checked.


ΓòÉΓòÉΓòÉ <hidden> Return Values - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

 allBidi  (ULONG) - return
    All Bidi indicator.

      TRUE
         The string contains one or more National Language Characters.

      FALSE
         The string does not contain any National Language characters.


ΓòÉΓòÉΓòÉ <hidden> Errors - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

The string is an "allBidi" string if all the characters in the string are only
Bidi characters (i.e. no LATIN characters)


ΓòÉΓòÉΓòÉ <hidden> Example - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

to be added


ΓòÉΓòÉΓòÉ <hidden> Related Functions - Win_BD_IsStringAllBidi ΓòÉΓòÉΓòÉ

Related Functions

   o  Win_BD_IsStringBidi


ΓòÉΓòÉΓòÉ <hidden> Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

/******************************************/
/* This function checks if a string is a  */
/* Bidi string.                           */
/******************************************/

#define INCL_PMBIDI
#include <os2.h>

PCHAR     pch;          /* Input string */
ULONG     ulMaxlen;     /* Number of characters */
ULONG     Bidistr;      /* Return value   */

   Bidistr  =  Win_BD_IsStringBidi ( pch, ulMaxlen );


ΓòÉΓòÉΓòÉ <hidden> Parameters - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

 pch  (PCHAR) - input
    Input string.

    The input string to be checked.

 ulMaxlen  (ULONG) - input
    Number of characters.

    The number of characters in the string to be checked.


ΓòÉΓòÉΓòÉ <hidden> Return Values - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

 Bidistr(BOOL) - return
    Bidi string indicator.

      TRUE
         String contains ONLY National Language Characters.

      FALSE
         String contains some LATIN characters.


ΓòÉΓòÉΓòÉ <hidden> Errors - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

A Bidi string is a string that contains at least one of the characters that are
NATIONAL LANGUAGE characters in the appropriate codepage.


ΓòÉΓòÉΓòÉ <hidden> Example - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

to be added


ΓòÉΓòÉΓòÉ <hidden> Related Functions - Win_BD_IsStringBidi ΓòÉΓòÉΓòÉ

Related Functions

   o  Win_BD_IsStringAllBidi


ΓòÉΓòÉΓòÉ 15.1. WinQueryKbdLayer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

/****************************************/
/* This function queries the current    */
/* or system keyboard layer.            */
/****************************************/

#define INCL_PMBIDI
#include <os2.h>

HWND      hwnd;         /* Window handle */
ULONG     ulLayerID;    /* Return value  */

      ulLayerID =  WinQueryKbdLayer( hwnd );


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - input
    Window handle.

    The window handle of the window for which the keyboard layer is queried, or
    HWND_DESKTOP.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

 ulLayerID(ULONG) - return
    Result indicator.

    Returns the value of the current keyboard layer.

      KBDLAYER_0
         The default/base layout used for the codepage.

      KBDLAYER_1
         The first country/language keyboard layout.


ΓòÉΓòÉΓòÉ <hidden> Errors - WinQueryKbdLayer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

The current keyboard layer queried is the one maintained for the window.


ΓòÉΓòÉΓòÉ <hidden> Example - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

This example queries the keyboard layer and draws a message box saying whether
it was national language (Arabic/Hebrew) or Latin.

#define INCL_PMBIDI
#define INCL_WINDIALOGS
#include <OS2.H>
#include <PMBIDI.H>

ULONG QueryKbdLayer(HWND hwnd)
 {
 ULONG KbdLayer;

    KbdLayer = WinQueryKbdLayer (hwnd); /* Window handle of the window whose */
                                        /* keyboard layer is queried         */
    if (KbdLayer)
           WinMessageBox (HWND_DESKTOP,
                          hwnd,
                          "The keyboard layer is National",
                          "Result",
                           0,
                           MB_OK);

    else
           WinMessageBox (HWND_DESKTOP,
                          hwnd,
                          "The keyboard layer is Latin",
                          "Result",
                           0,
                           MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinQueryKbdLayer ΓòÉΓòÉΓòÉ

Related Functions

   o  WinSetKbdLayer


ΓòÉΓòÉΓòÉ 15.2. WinQueryLangInfo ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinQueryLangInfo ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinQueryLangInfo ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function returns the Bidirectional */
/* information of the data specified by    */
/* ulEffect.                               */
/*******************************************/

#define INCL_PMBIDI
#include <os2.h>

HWND      hwnd;         /* Window handle */
ULONG     ulEffect;     /* Specifies type of Bidi information to be queried */
ULONG     ulFlags;      /* Flag to determine optional behavior */
ULONG     ulReserved;   /* Reserved and must be zero */
ULONG     uldata;       /* Return value */

     ulData  =  WinQueryLangInfo ( hwnd, ulEffect, ulFlags, ulReserved );


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinQueryLangInfo ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - input
    Window handle.

    Handle of the window to be queried. This parameter should be NULLHANDLE
    when the information being queried is not window-related.

 ulEffect  (ULONG) - input
    Specifies type of Bidi information to be queried.

    It determines which type of Bidi-information is queried Depending on its
    value.

      LI_BD_CLIP_ATTR
         Clipboard bidirectional attributes.

      LI_BD_CLIP_CONV_ATTR
         The clipboard conversion bidirectional attributes.

      LI_BD_PROCESS_ATTR
         The process bidirectional attributes.

      LI_BD_WND_ATTR
         The window Bidi attributes.

      LI_BD_WND_STAT
         The window Bidi status.

 ulFlags  (ULONG) - input
    Flag to determine optional behavior.

    This is a word of bit flags that determines optional behavior of this
    function. Possible values are:

      LIF_NO_SENDMSG
         No message is sent to the window to inform it of change. This value is
         valid only when the operation is related to windows.

 ulReserved  (ULONG)
    Reserved.

    Is reserved and must be Zero.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinQueryLangInfo ΓòÉΓòÉΓòÉ

 ulData  (ULONG) - return
    Bidirectional value indicator.

      BIDIATTR
         Bidi attribute information.

      BIDISTAT
         Bidi status information.

      NULL
         Query of the bidi attributes was unsuccessful.


ΓòÉΓòÉΓòÉ <hidden> Errors - WinQueryLangInfo ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinQueryLangInfo ΓòÉΓòÉΓòÉ

The interpertation of this function is dependent on the value of ulEffect. This
function is considered "window related" when ulEffect is LI_BD_WND_ATTR or
LI_BD_WND_STAT.

When ulEffect is not window related then the value of hwnd must be NULL.

On the other hand, when ulEffect is window related, the function optionally
sends a WM_QUERYBIDIATTR or WM_QUERYBIDISTAT message to the window procedure
whose information is being queried. The window procedure which is queried for
bidi information can take some action and/or perform any additional processing
that is required at this time. When LIF_NO_SENDMSG flag is specified no window
message is sent by the function. This can be used by the window procedure
itself when it queries its own window-related bidirectional information (so
that it does not receive a recursive message).

It is recommended that the LIF_NO_SENDMSG flag is not turned when the function
is called from outside the window procedure whose attributes are being queried.
Applications should generally use the default (send the message to the window
procedure), so that the bidi aware window procedures can take the appropriate
actions when the request to query their bidi attributes is made.


ΓòÉΓòÉΓòÉ <hidden> Example - WinQueryLangInfo ΓòÉΓòÉΓòÉ

This example queries the Staus bits of a window. If these indicated the
characters to be FINAL, a message is printed saying so else it says that they
are not final characters

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>



VOID QueryLangInfo(HWND hwnd)
 {
 ULONG  BidiStat;

    BidiStat = WinQueryLangInfo(hwnd,        /* Window handle of the window whose      */
                                             /* status is queried                      */
                         LI_BD_WND_STAT,     /* The window status is queried           */
                         LIF_NO_SENDMSG,
                         0L);                /* Reserved to be 0L                      */

    if ( QUERY_BD_VALUE (BidiStat,BDSM_HKFLAGS) == BDS_HKFLAG_PUSH)
        WinMessageBox (HWND_DESKTOP,
                       hwnd,
                       "Push Hotkey is disabled",
                       "Result",
                        0,
                        MB_OK);
    else
        WinMessageBox (HWND_DESKTOP,
                       hwnd,
                       "Push Hotkey is enabled".
                       "Result",
                        0,
                        MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinQueryLangInfo ΓòÉΓòÉΓòÉ

Related Functions

   o  WinSetLangInfo


ΓòÉΓòÉΓòÉ 15.3. WinQueryLangViewer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinQueryLangViewer ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinQueryLangViewer ΓòÉΓòÉΓòÉ

/*******************************************/
/*  This function queries the current      */
/*  'Language Viewer' window, registered   */
/*  by the system for a specific codepage. */
/*******************************************/

#define INCL_PMBIDI
#include <os2.h>

HAB       hab;          /* Anchor block    */
ULONG     Codepage;     /* Codepage value  */
HWND      hwnd;         /* Return value    */

      hwnd  =  WinQueryLangViewer( hab, Codepage );


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinQueryLangViewer ΓòÉΓòÉΓòÉ

 hab  (HAB) - anchor block
    Anchor block.

    The anchor block handle of the application.

 Codepage  (ULONG) - input
    Window codepage.

    The codepage for which the "Language Viewer" window is queried. The
    following codepage values are supported:

      864    Arabic PC.

      862    Hebrew PC.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinQueryLangViewer ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - return
    Result indicator.

    Returns the handle of the current language viewer.

      NULLHANDLE
         No language viewer is registered for this codepage.

      Other
         Handle of the current language viewer.


ΓòÉΓòÉΓòÉ <hidden> Errors - WinQueryLangViewer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinQueryLangViewer ΓòÉΓòÉΓòÉ

None.


ΓòÉΓòÉΓòÉ <hidden> Example - WinQueryLangViewer ΓòÉΓòÉΓòÉ

This example queries the Language Viewer window handle registered currently in
the system for the currently used code page.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>

HAB    hab;
HWND   hwnd;
HMQ    hmq;
ULONG  cp;


VOID QueryLanguageViewerWindow(VOID)
 {
    cp = WinQueryCp(hmq);                  /* Query current code page                */

    if (hwnd = WinQueryLangViewer(hab,     /* Anchor block handle of the application */
                                           /* that registered the Language Viewer    */
                         cp))              /* Current code page                      */

         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "The Language Viewer handle was queried correctly",
                        "Result",
                         0,
                         MB_OK);
    else
         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "No Language Viewer has been registered for this code page",
                        "Error",
                         0,
                         MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinQueryLangViewer ΓòÉΓòÉΓòÉ

Related Functions

   o  WinSetLangViewer


ΓòÉΓòÉΓòÉ 15.4. WinSetKbdLayer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinSetKbdLayer ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinSetKbdLayer ΓòÉΓòÉΓòÉ

/****************************************/
/* This function sets the keyboard      */
/* layer.                               */
/****************************************/

#define INCL_PMBIDI
#include <os2.h>

HWND      hwnd;         /* Window handle */
ULONG     ulLayerID;    /* Specifies the keyboard layer */
ULONG     flFlags;      /* impact flages */
BOOL      fsuccess;     /* Return value  */

   fsuccess  =  WinSetKbdLayer  ( hwnd, ulLayerID, flFlags);


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinSetKbdLayer ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - input
    Window handle.

    Window handle of the window for which the keyboard layer is set, or
    HWND_DESKTOP.

 ulLayerID  (ULONG) - input
    Keyboard layer.

    ID of the keyboard layer being set.

      KBDLAYER_0
         This corresponds to the default/base layout used for the codepage.

      KBDLAYER_1
         This corresponds to the first country/language keyboard layout.
         Usually, this maps to the specific language (e.g. Arabic or Hebrew
         layout)

 flFlags  (ULONG) - input
    Impact flags.

    Flags which impact the way WinSetKbdLayer works.

      bit 0 = 0:
         Post the WM_KBDLAYERCHANGED message.

      bit 0 = 1:
         Do not post the WM_KBDLAYERCHANGED message.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinSetKbdLayer ΓòÉΓòÉΓòÉ

 fSuccess  (BOOL) - return
    Success indicator.

      TRUE
         Setting of the keyboard layer succeeded.

      FALSE
         An error occurred. The WinGetLAstError function may return the
         following errors:

        o  PMERR_INVALID_HWND
        o  PMERR_INVALID_VALUE


ΓòÉΓòÉΓòÉ <hidden> Errors - WinSetKbdLayer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinSetKbdLayer ΓòÉΓòÉΓòÉ

The system maintains one global keyboard layer variable. This variable is
updated according to the layer information of the window that has the keyboard
focus.

WinSetKbdLayer saves the keyboard layer specified as an input parameter in an
area maintained by the system on behalf of the window. If the window has the
focus, the system keyboard layer is also set.

When the value of hwnd is HWND_DESKTOP, only the system keyboard layer is
updated.


ΓòÉΓòÉΓòÉ <hidden> Example - WinSetKbdLayer ΓòÉΓòÉΓòÉ

This example sets the keyboard layer to National and posts the message
WM_KBDLAYERCHANGED through setting the impact flags bit to zero.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>


VOID SetKbdLayer(HWND hwnd)
 {
    if (WinSetKbdLayer(hwnd,
              KL_NATIONAL,            /* First country/language layout       */
              SKLF_SENDMSG))          /* Post the WM_KBDLAYERCHANGED message */

         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Setting keyboard layer succeeded",
                        "Result",
                         0,
                         MB_OK);
    else
         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Setting keyboard layer failed",
                        "Error",
                         0,
                         MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinSetKbdLayer ΓòÉΓòÉΓòÉ

Related Functions

   o  WinQueryKbdLayer


ΓòÉΓòÉΓòÉ 15.5. WinSetLangInfo ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinSetLangInfo ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinSetLangInfo ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function sets the window Bidi      */
/* attributes and status.                  */
/*******************************************/

#define INCL_PMBIDI
#include <os2.h>

HWND      hwnd;         /* Window handle */
ULONG     ulEffect;     /* Specifies type of Bidi information to be set */
ULONG     ulData;       /* Data to be set in specified attribute */
ULONG     ulMask;       /* Mask value indicating attribute/status fields to be updated */
ULONG     ulFlags;      /* Flag to determine optional behavior */
ULONG     ulReserved;   /* Reserved */
ULONG     fsuccess;     /* Return value */

   fsuccess  =  WinSetLangInfo ( hwnd, ulEffect, ulData, ulMask,
                          ulFlags, ulReserved );


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinSetLangInfo ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - input
    Window handle.

    Handle of the window whose attributes or status is to be set. This
    parameter should be NULLHANDLE when the information being queried is not
    window-related.

 ulEffect  (ULONG) - input
    Specifies the type of Bidi information to be set.

    It determines which type of Bidi-information is set Depending on its value.

      LI_BD_CLIP_ATTR
         Clipboard bidirectional attributes.

      LI_BD_CLIP_CONV_ATTR
         The clipboard conversion bidirectional attributes.

      LI_BD_PROCESS_ATTR
         The process bidirectional attributes.

      LI_BD_WND_ATTR
         The window Bidi attributes.

      LI_BD_WND_STAT
         The window Bidi status.

 ulData  (ULONG) - input
    Data to be set in specified attribute.

    The value of the specified fields to be set in the Bidi attributes or the
    Bidi status.  These values are contained in the BIDIATTR and the BIDISTAT.

 ulMask  (ULONG) - input
    Mask value indicating attribute or status fields to be updated. This is a
    bit value that is used to mask the uldata value when the effect is related
    to a window (LI_BD_WND_ATTR or LI_BD_WND_STAT). Only the bits that are set
    in ulMask, are enabled for update by the values in ulData.

    Depending on the value of ulEffect, ulMask can have one or more of the
    values in either the Bidi status (see BIDISTATM) or the Bidi attributes
    (see BIDIATTRM).

 ulFlags  (ULONG)
    Flag to determine optional behavior.

    These are flags that determine optional behavior of this function. The
    following are possible values:

      LIF_NO_SENDMSG
         No message is sent to the window to inform it of change. This value is
         valid only when the operation is related to windows.

      LIF_CHILD_INHERIT
         The operation is performed for the window whose handle is specified
         and all his child windows. This value is valid only when the operation
         is related to windows.

      LIF_WND_REFRESH
         Refresh all the windows whose bidirectional information is being set.
         This value is valid only when the operation is related to windows.

 ulReserved  (ULONG)
    Is reserved and must be Zero.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinSetLangInfo ΓòÉΓòÉΓòÉ

 fSuccess  (ULONG) - return
    Success indicator.

      TRUE
         Setting of the Bidi attribute succeeded.

      FALSE
         An error occurred. The WinGetLAstError function may return the
         following errors:

        o  PMERR_INVALID_HWND
        o  PMERR_INVALID_VALUE


ΓòÉΓòÉΓòÉ <hidden> Errors - WinSetLangInfo ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinSetLangInfo ΓòÉΓòÉΓòÉ

The interpertation of the parameters is dependent on the value of ulEffect.
This function is considered "window related" when ulEffect is LI_BD_WND_ATTR or
LI_BD_WND_STAT.

When ulEffect is not window related then the value of hwnd must be NULL and the
ulMask value is ignored(ie no mask is used, the value provided in ulData is
used to set the information).

When ulEffect is window related, the function optionally sends a WM_SETBIDIATTR
or WM_SETBIDISTAT message to the window procedure whose information is being
set. The window procedure can set the bidi information by itself, and/or
perform any additional processing that is required when its bidirectional
information is set. When LIF_NO_SENDMSG flag is specified no window message is
sent by the function. This can be used by the window procedure itself when it
updates its own window-related bidirectional information (so that it does not
receive a recursive message).

It is recommended that the LIF_NO_SENDMSG flag is not turned when the function
is called from outside the window procedure whose attributes are being set.
Applications should generaly use the default (send the message to the window
procedure), so that the bidi aware window procedures can take the appropriate
actions when the request to change their bidi attributes is made.

There may be causes where the LIF_WND_REFRESH flag is specified but the window
is not refreshed by the function. This can happen when a window procedure
processes any of the messages sent by this function. In this case it is up to
the window procedure code to determine if the window must be redrawn or not.

It is recommended that the LIF_NO_SENDMSG flag is NOT turned on, when the code
executes outside the window procedure whose attributes are set.

Applications should generally use the default (send the messege to the window
procedure), so that Bidi-aware window procedures can take the appropriate
actions when the request to change their Bidi attributes/status is made.


ΓòÉΓòÉΓòÉ <hidden> Example - WinSetLangInfo ΓòÉΓòÉΓòÉ

This example sets the window attributes and those of its children to make their
WND and TEXT orientations RTL.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>


VOID SetWindowBidiAttributes(HWND hwnd)
 {
    if (WinSetLangInfo(hwnd,
          LI_BD_WND_ATTR,           /* Type of information to be set is window attributes       */
          BDA_WND_ORIENT_RTL |      /* Data to be set is RTL Wnd and Text orientations          */
          BDA_TEXT_ORIENT_RTL,
          BDAM_WND_ORIENTATION |    /* Masks indicating which attributes to modify              */
          BDAM_TEXT_ORIENTATION,
          LIF_CHILD_INHERIT,       /* Flag to indicate that the operation is to be             */
                                    /* performed for that window and its children               */
          0L))                      /* Reserved to 0                                            */

         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Operation succeeded",
                        "Result",
                         0,
                         MB_OK);
    else
         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Operation failed",
                        "Error",
                         0,
                         MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinSetLangInfo ΓòÉΓòÉΓòÉ

Related Functions

   o  WinQueryLangInfo


ΓòÉΓòÉΓòÉ 15.6. WinSetLangViewer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - WinSetLangViewer ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - WinSetLangViewer ΓòÉΓòÉΓòÉ

/****************************************/
/* This function is used to register    */
/* a 'Language Viewer' window with the  */
/* system.                              */
/****************************************/

#define INCL_PMBIDI
#include <os2.h>

HAB       hab;          /* Anchor block    */
HWND      hwnd;         /* Window Handle   */
ULONG     Codepage;     /* window codepage */
HWND      hwndPrev;     /* return value    */

      hwndPrev  =  WinSetLangViewer( hab, hwnd, Codepage );


ΓòÉΓòÉΓòÉ <hidden> Parameters - WinSetLangViewer ΓòÉΓòÉΓòÉ

 hab  (HAB) - anchor block
    Anchor block.

    The anchor block handle of the application that registers the Language
    Viewer.

 hwnd  (HWND) - input
    Window handle.

    The window handle of the new Language Viewer window.

 Codepage  (ULONG) - input
    Window codepage.

    The codepage for which the "Language Viewer" window is registered. The
    following codepage values are supported:

      864    Arabic PC.

      862    Hebrew PC.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinSetLangViewer ΓòÉΓòÉΓòÉ

 hwnd  (HWND) - return
    Result indicator.

    Returns the previous Language Viewer handle for this codepage.

      NULLHANDLE
         No Language Viewer was previously registered for this codepage.

      Other
         Previous Language Viewer handle for this codepage.


ΓòÉΓòÉΓòÉ <hidden> Errors - WinSetLangViewer ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - WinSetLangViewer ΓòÉΓòÉΓòÉ

The "Language Viewer" window displays control and status information that is
useful for users of a specific language.

The "Language Viewer" window is sent  WM_LANG_INFO_CHANGED notification message
by the system to inform it of significant events that are relevent to users of
a specific language.


ΓòÉΓòÉΓòÉ <hidden> Example - WinSetLangViewer ΓòÉΓòÉΓòÉ

This example registers a new Language Viewer window for the system.  The
current code page is used.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>

HAB    hab;
HMQ    hmq;
ULONG  cp;


VOID SetLangViewerWindow(HWND hwnd)
 {
    cp = WinQueryCp(hmq);       /* Query current code page                */

    if (WinSetLangViewer(hab,   /* Anchor block handle of the application */
                                /* that registers the Language Viewer     */
                         hwnd,  /* Window handle of the new language      */
                                /* viewer window                          */
                         cp))   /* Current code page                      */

         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Setting Language Viewer window succeeded.",
                        "Replacing previous Lang Viewer window",
                         0,
                         MB_OK);
    else
         WinMessageBox (HWND_DESKTOP,
                        hwnd,
                        "Setting Language Viewer window succeeded."
                        "No previous Lang Viewer window",
                         0,
                         MB_OK);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - WinSetLangViewer ΓòÉΓòÉΓòÉ

Related Functions

   o  WinQueryLangViewer


ΓòÉΓòÉΓòÉ 16. Bidirectional Support GPI Functions ΓòÉΓòÉΓòÉ

This section contains the functions that are related to GPI bidirectional text
processing.

See the OS/2 Programming Guide, Volume II for details on commom programming
techniques for managing GPI, in general.


ΓòÉΓòÉΓòÉ 16.1. GpiQueryBidiAttr ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function queries the bidirectional */
/* of a GPI presentation space.            */
/*******************************************/

#define INCL_PMBIDI
#include <os2.h>

HPS       hps;          /* Presentation space handle */
ULONG     ulBidiAttr;   /* Bidirectional Attributes word */

   ulBidiAttr =  GpiQueryBidiAttr  ( hps );


ΓòÉΓòÉΓòÉ <hidden> Parameters - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ

 hps - input
    Presentation Space handle.

    Handle of the GPI presentation space whose bidirectional attributes are
    being set.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinSetKbdLayer ΓòÉΓòÉΓòÉ

 ulBidiAttr  (ULONG)
    Bidirectional Attributes word.


ΓòÉΓòÉΓòÉ <hidden> Errors - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Example - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ

This example Queries the Bidirectional Attributes of the presentation space,
modifed the BDA_TEXTTYPE parameter and sets the new value to be the new
bidirectional attributes word of the presentation space.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>


VOID SetBidiAttr(VOID)
 {
 HPS hps;
 ULONG ulBidiAttr;
 ULONG fSuccess;

 hps = WinGetPS(hwnd);

 if (hps)
    ulBidiAttr = GpiQueryBidiAttr (hps);

 ulBidiAttr &= ~BDAM_TEXTTYPE;
 ulBidiAttr |= BDA_TEXTTYPE_VISUAL;

 fSuccess = GpiSetBidiAttr (hps, ulBidiAttr);

 WinReleasePS(hps);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - GpiQueryBidiAttr ΓòÉΓòÉΓòÉ

Related Functions

   o  GpiSetBidiAttr


ΓòÉΓòÉΓòÉ 16.2. GpiSetBidiAttr ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

/****************************************/
/* This function sets the Bidirectional */
/* attributes of a presentation space.  */
/****************************************/

#define INCL_PMBIDI
#include <os2.h>

HPS       hps;          /* Presentation space handle */
ULONG     ulBidiAttr;   /* Bidirectional Attributes word */
BOOL      fsuccess;     /* Return value  */

   fsuccess  =  GpiSetBidiAttr  ( hps, BidiAttr);


ΓòÉΓòÉΓòÉ <hidden> Parameters - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

 hps - input
    Presentation Space handle.

    Handle of the GPI presentation space whose bidirectional attributes are
    being set.

 ulBidiAttr  (ULONG) - input
    Bidirectional Attributes word BIDIATTR

    The Bidirectional Attributes being set.


ΓòÉΓòÉΓòÉ <hidden> Return Values - WinSetKbdLayer ΓòÉΓòÉΓòÉ

 fSuccess  (BOOL) - return
    Success indicator.

      TRUE
         Sucessful.

      FALSE
         An error occurred.


ΓòÉΓòÉΓòÉ <hidden> Errors - GpiSetBidiAttr ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

The default bidirectional attributes word of the presentation space is set at
the time the PS is created by inheriting the process bidirectional attributes
word.

 Note that for normal and micro presentation spaces, the process bidirectional
attributes are inherited when the device context is created, so setting the
process bidirectional attribute must be done before the device context is
created in order to affect the presentation space which is associated with it.

This function is used to dynamically change the setting of the bidirectional
attributes of a GPI PS, thus affecting the Bidirectional text conversions that
are performed by GPI.


ΓòÉΓòÉΓòÉ <hidden> Example - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

This example sets the Bidirectional Attributes of the presentation space to the
set of attributes in ulBidiAttr. flags bit to zero.

#define INCL_PMBIDI
#include <OS2.H>
#include <PMBIDI.H>

HWND   hwnd;


VOID SetBidiAttr(VOID)
 {
 HPS hps;
 ULONG ulBidiAttr = BDA_TEXT_ORIENT_LTR | BDA_TEXTTYPE_VISUAL ;
 ULONG fSuccess;

 hps = WinGetPS(hwnd);

 if (hps)
    fSuccess = GpiSetBidiAttr (hps, ulBidiAttr);

 WinReleasePS(hps);

 }


ΓòÉΓòÉΓòÉ <hidden> Related Functions - GpiSetBidiAttr ΓòÉΓòÉΓòÉ

Related Functions

   o  GpiQueryBidiAttr


ΓòÉΓòÉΓòÉ 17. Bidirectional Text Conversions ΓòÉΓòÉΓòÉ

OS/2 provides a set of functions to manage the conversion of bidirectional text
between different formats. The text is assumed to be in a form/representation
that is described by a set of input values and is converted to another form
described by a set of output values.

In order to perform a text conversion, the caller must first call
LayoutCreateObject to create a layout object. The layout object is
automatically associated with a set of default values, known as layout values,
that depend on the locale used to create it.

Currently, the following locale is supported:

   o  Locale_Arabic

   o  Locale_Hebrew

 Using the handle to the layout object created, the caller can query the
 current values using LayoutQueryValues and set them, using LayoutSetValues, to
 the values required for the text transformation.

 The section Layout Values describes the standard set of layout values that are
 supported. It also describes which layout values may be changed after creation
 of the layout object.

 The actual text transformation is done by the LayoutTransformText function,
 which converts its input buffer according to the values associated with the
 layout object. LayoutTransformText can also optionally provide some additional
 information about the transformation performed, such as mappings of the input
 buffer to the output buffer.

 LayoutEditShape is a more specialized text conversion function that allows an
 application to do Arabic character shape editing in and around a specific
 location in a buffer.

 When an application has finished its text conversions, it can release the
 resources used by the layout object using LayoutDestroyObject.


ΓòÉΓòÉΓòÉ 17.1. Layout Values ΓòÉΓòÉΓòÉ

The following layout values are associated with a layout object when the locale
used with LayoutObjectCreate is Locale_Arabic or Locale_Hebrew.

Value Name                Value Type             Set/Get
___________               ___________             _____
 ActiveBidirection         BOOL                      G
 ActiveShapeEditing        BOOL                      G
 ShapeContextSize          LAYOUT_EDIT_SIZE          G
 Cellsize                  ULONG                    SG
 InputMode                 BOOL                     SG
 CallerAllocMem            BOOL                     SG
 QueryValueSize            ULONG                    SG
 InOutTextDescrMask        ULONG                    SG
 InOnlyTextDescr           ULONG                    SG
 OutOnlyTextDescr          ULONG                    SG
 Orientation               LAYOUT_TEXT_DESCRIPTOR   SG
 TypeOfText                LAYOUT_TEXT_DESCRIPTOR   SG
 Swapping                  LAYOUT_TEXT_DESCRIPTOR   SG
 Numerals                  LAYOUT_TEXT_DESCRIPTOR   SG
 TextShaping               LAYOUT_TEXT_DESCRIPTOR   SG
 WordBreak                 LAYOUT_TEXT_DESCRIPTOR   SG

 ActiveBidirection (BOOL)

    If ActiveBidirection is set to True then the layout object includes
    knowledge of directional code elements and proper rendering of text will
    require reordering of directional code elements. Otherwise the layout
    object does not require any reordering of directional code elements and all
    code elements will be classified as left_to_right.

    The ActiveBidirection value is guaranteed not to change for the life of the
    layout object.

    For Locale_Arabic and Locale_Hebrew, ActiveBidirection is always True.

 Active Shape Editing (BOOL)

    If ActiveShapeEditing is set to True, then the layout object includes
    knowledge of context dependent code elements (i.e. an Automatic Shape
    Determination algorithm) that requires shaping for presentation. If True,
    the user of a layout object is required to perform some transformation
    and/or edit shaping prior to rendering the text.

    Otherwise, the layout object does no shaping and all code elements may be
    presented independent of the surrounding characters.

    The ActiveShapeEditing value is guaranteed not to change for the life of
    the layout object.

    For Locale_Arabic, ActiveShapeEditing is always True.

    For Locale_Hebrew, ActiveShapeEditing is always False.

 ShapeContextSize (LAYOUT_EDIT_SIZE)

    The ShapeContextSize specifies the size of the context (surrounding code
    elements) that needs to be accounted for when performing
    ActiveShapeEditing. The ShapeContextSize is defined as a structure of type
    LAYOUT_EDIT_SIZE, which defines the number of surrounding code elements
    that need to be considered when performing edit shaping, i.e., calling the
    LayoutEditShape function.

    When a substring is inserted into a string, the front and back elements
    define the number of code elements after the substring and the number of
    code elements before the substring, respectively, that need to be
    considered when performing edit shaping.

    If both front and back elements are set to zero, then no additional context
    needs to be considered for edit shaping. When ActiveShapeEditing is not set
    (False), the front and back are guaranteed to be zero (0).

    The ShapeContextSize value is guaranteed not to change for the life of the
    layout object.

    For Locale_Arabic, ShapeContextSize.front = ShapeContextSize.back = 3.

    For Locale_Hebrew, ShapeContextSize is not relevant.

 CellSize (ULONG)

    The size of each character cell (is > 1 when each character is followed by
    one or more attributes; 'CellSize' is 1 when characters occupy consecutive
    positions in memory).

    The default value of CellSize is 1.

 InputMode (BOOL)

    This value defines whether the implicit algorithm should produce text in
    its final form (InputMode=FALSE), or if the text should be considered
    incomplete, as if it is still being input from the keyboard
    (InputMode=TRUE).

    The default value of InputMode is FALSE.

 The following values are related to the memory allocation convention used when
 calling LayoutQueryValues.

 CallerAllocMem (BOOL)

           If the descriptor CallerAllocMem is set to TRUE, when calling
           LayoutQueryValues function, it is the responsibility of the caller
           to allocate storage to store the actual data and freeing this data.

           If the descriptor CallerAllocMem is set to FALSE, then
           LayoutQueryValues allocates storage to store the actual data and the
           caller is responsible for freeing this data.

           For example, if the value of the Orientation text descriptor is
           being queried, LayoutQueryValues will allocate the memory for the
           LAYOUT_TEXT_DESCRIPTOR structure and the caller must free the
           pointer returned using DosFreeMem.

           The default value for CallerAllocMem is FALSE;

 QueryValueSize (ULONG)

           This name is used to query the size of any of the layout values by
           ORing it with the name of the layout value. In this case the value
           field will be a pointer to allocation where the size of the layout
           value will be stored.

           Currently, all structures used in OS/2 are of known size, so
           applications will not need to use this option.

 The remaining layout values are all related to describing the format of the
 input and output buffers. These values define the behaviour of the
 LayoutTransformText APIs. Two functionally equivalent methods are provided for
 setting these attributes/descriptors.

 InOutTextDescrMask, InOnlyTextDescr and OutOnlyTextDescr

 These are three values that allow the caller to use the same bidi attribute
 masks and bidi attributes that are used in the WinSetLangInfo APIs.

 InOutTextDescrMask (ULONG)

           This is a bit value that is used to mask the InOnlyTextDescr and
           OutOnlyTextDescr values. Only the bits that are set in
           InOutTextDescrMask are enabled for Set/Query of the InOnlyTextDescr
           and OutOnlyTextDescr values.

           InOnlyTextDescr can have one or more of the following values:

   o  BDAM_TEXTTYPE
   o  BDAM_TEXT_ORIENTATION
   o  BDAM_NUMERALS
   o  BDAM_SYM_SWAP
   o  BDAM_TEXT_SHAPE
   o  BDAM_WORD_BREAK
   o  BDAM_ALL

           The default value of InOnlyTextDescr is BDAM_ALL

 InOnlyTextDescr (ULONG)

           This is the data that is to be used (masked using the
           InOutTextDescrMask value) to describe the format of the input text.

           Possible values are:

   o  BDA_TEXTTYPE_VISUAL
   o  BDA_TEXTTYPE_IMPLICIT


   o  BDA_TEXT_ORIENT_LTR
   o  BDA_TEXT_ORIENT_RTL
   o  ORIENTATION_CONTEXT_LTR
   o  ORIENTATION_CONTEXT_RTL


   o  BDA_NUMERALS_NOMINAL
   o  BDA_NUMERALS_HINDI
   o  BDA_NUMERALS_CONTEXTUAL
   o
   o  BDA_SYM_SWAP_OFF
   o  BDA_SYM_SWAP_ON


   o  BDA_WORDBREAK_OFF
   o  BDA_WORDBREAK_ON


   o  BDA_TEXT_DISPLAY_SHAPED
   o  BDA_TEXT_NOMINAL
   o  BDA_TEXT_INITIAL
   o  BDA_TEXT_MIDDLE
   o  BDA_TEXT_FINAL
   o  BDA_TEXT_ISOLATED

           For Locale_Arabic, the default value of InOnlyTextDescr is :

                      BDA_TEXTTYPE_IMPLICIT | BDA_TEXT_ORIENT_LTR | BDA_NUMERALS_NOMINAL |
                      BDA_SYM_SWAP_OFF | BDA_WORDBREAK_OFF | BDA_TEXT_NOMINAL

           For Locale_Hebrew, the default value of InOnlyTextDescr is :

                      BDA_TEXTTYPE_IMPLICIT | BDA_TEXT_ORIENT_CONTEXT | BDA_NUMERALS_NOMINAL |
                      BDA_SYM_SWAP_OFF | BDA_WORDBREAK_OFF | BDA_TEXT_SAVE_SHAPED

 OutOnlyTextDescr (ULONG)

           This is the data that is to be used (masked using the
           InOutTextDescrMask value) to describe the format of the output text.

           Possible values are the same as for InOnlyTextDescr described above.

           For Locale_Arabic and Locale_Hebrew, the default value of
           OutOnlyTextDescr is :

                      BDA_TEXTTYPE_VISUAL | BDA_TEXT_ORIENT_LTR | BDA_NUMERALS_NOMINAL |
                      BDA_SYM_SWAP_OFF | BDA_WORDBREAK_OFF | BDA_TEXT_DISPLAY_SHAPED

 The following code fragment shows how an application would set the orientation
 and type of text using this method:

  LAYOUT_VALUES     layout[4];
  ULONG             ulMask,ulInAttr,ulOutAttr;
       .
       .
       .
                                                             /* Set mask */
  ulData          = BDAM_TEXTTYPE | BDAM_TEXT_ORIENTATION;
  layout[0].name  = InOutTextDescrMask;
  layout[0].value = &ulData;

                                                 /* Set input descriptor */
  ulInAttr        = BDA_TEXTTYPE_IMPLICIT | BDA_TEXT_ORIENT_RTL;
  layout[1].name  = InOnlyTextDescr;
  layout[1].value = &ulInAttr;

                                                /* Set output descriptor */
  ulOutAttr       = BDA_TEXTTYPE_VISUAL   | BDA_TEXT_ORIENT_LTR;
  layout[2].name  = OutOnlyTextDescr;
  layout[2].value = &ulOutAttr;

                                                  /* Last value in array */
  layout[3].name  = 0;
                                  /* Set the values in the layout object */
   RC = LayoutSetValues(hlo,layout,&index);

 Using LayoutTextDescriptors

 Using the following values, which are of type LAYOUT_TEXT_DESCRIPTOR, the
 caller can set the input and output values of one or more descriptors. This
 has exactly the same effect as using the previous method : the choice of which
 method to use is a matter of style.

 Orientation (LAYOUT_TEXT_DESCRIPTOR)

           The descriptor Orientation specifies the global directional text
           orientation:

      ORIENTATION-LTR-left-to-right global orientation

      ORIENTATION-RTL-right-to-left global orientation

      ORIENTATION-CONTEXTUAL-contextual global orientation

 When ORIENTATION-CONTEXTUAL is set, the Orientation setting is determined
 according to the direction of the first significant code element.

 TypeOfText (LAYOUT_TEXT_DESCRIPTOR)

           The TypeOfText descriptor specifies the directional ordering of the
           directional text in the buffer:

      TEXT-VISUAL-code elements are stored in visually ordered segments which
      can be rendered as is.  Bidirectional code elements will have to be
      previously reordered for a specific orientation.

      TEXT-IMPLICIT-code elements are stored in logically ordered segments.

 Swapping (LAYOUT_TEXT_DESCRIPTOR)

           The Swapping descriptor specifies whether symmetric swapping is
           applied to the text:

      SWAPPING- The text conforms to symmetric swapping

      NO_SWAPPING- The text does not conform to symmetric swapping

 Numerals (LAYOUT_TEXT_DESCRIPTOR)

           The Numerals descriptor specifies the shaping of numerals recognized
           by the layout object:

      NUMERALS_NOMINAL - Nominal shaping of numerals using the portable
      character set (i.e. Arabic numerals).

       NUMERALS_NATIONAL - National shaping of numeral based on the script of
      the locale associated with the layout object (i.e. for Arabic, Hindi
      numerals are used).

       NUMERALS_CONTEXTUAL - Contextual shaping of numeral, depending on the
      context (script) of surrounding text (e.g. Hindi numbers in Arabic text
      and Arabic numbers otherwise). Contextual shaping of numerals can only be
      done if TypeOfText is TEXT_IMPLICIT.

 Text shaping (LAYOUT_TEXT_DESCRIPTOR)

            TextShaping: specifies the characteristics of the in/out text

      TEXT_SHAPED - The text contains presentation form shapes as defined by
      the locale

      TEXT_NOMINAL - The text has no presentation form shapes as defined by the
      locale.

      TEXT_INITIAL - The visual text has only initial shapes.

      TEXT_MIDDLE - The visual text has only middle shapes.

      TEXT_FINAL - The visual text has only final shapes.

      TEXT_ISOLATED - The visual text has only isolated shapes.

 WordBreak (LAYOUT_TEXT_DESCRIPTOR)

           The WordBreak descriptor specifies whether bidirectional should
           factor word recognition or not.

      BREAK _ WordBreak on, word by word reordering (i.e. the text reordering
      is dependent on the level (per the bidirectional algorithm) of word
      separators).

      NO_BREAK _ word break off, segment reordering.

  This descriptor is significant only if TypeOfText is TEXT_IMPLICIT.

 The following code fragment shows how an application would set the orientation
 and type of text using this method. This has exactly the same effect as the
 previous example :

  LAYOUT_VALUES     layout[2];
  LAYOUT_TEXT_DESCRIPTOR descr;
              .
              .
              .
                               /* Put the descr record in the layout array */
  layout[0].name  = TypeOfText | Orientation;
  layout[0].value = &descr;

                                                   /* Last value in array */
  layout[1].name  = 0;
                                           /* Initialize the input value */
  descr.in  = TEXT_IMPLICIT | ORIENTATION_RTL;
                                           /* Initialize the output value */
  descr.out = TEXT_VISUAL   | ORIENTATION_LTR;
                                  /* Set the values in the layout object */
   RC = LayoutSetValues(hlo,layout,&index);


ΓòÉΓòÉΓòÉ 17.2. Layout Functions ΓòÉΓòÉΓòÉ

Bidirectional applications use bidirectional text.  The bidirectional text is
identified by the bidirectional attributes.  Since applications use different
sets of bidirectional attributes (and thus, different representations of
bidirectional text), it is necessary to convert this text among representation
forms.  The most common case is when an application converts the text from the
internal (storage) representation to the external (presentation) form.

OS/2 provides a set of Layout functions to manage the conversion of
bidirectional text between different formats. The text is assumed to be in a
form/representation that is described by a set of input values and is converted
to another form described by a set of output values.


ΓòÉΓòÉΓòÉ 17.2.1. LayoutCreateObject ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutCreateObject ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutCreateObject ΓòÉΓòÉΓòÉ

/********************************************/
/* This function creates and initializes a  */
/* layout object associated with the locale */
/* specified by locale_name.                */
/********************************************/

#define INCL_LAYOUT
#include <layout.h>

PUCHAR           locale_name;  /* Name of the locale used */
PLAYOUT_OBJECT   plh;          /* Pointer to a valid layout object */
APIRET           RC;           /* Return value */

     RC  =  LayoutCreateObject ( locale_name, plh );


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutCreateObject ΓòÉΓòÉΓòÉ

 locale_name  (PUCHAR) - input
    Name of the locale used.

    This argument specifies the type of locale used, the following are possible
    values:

      Locale_Arabic       for Arabic support.

      Locale_Hebrew       for Hebrew support.

 plh  (PLAYOUT_OBJECT) - input
    Pointer to a valid layout object.

    The value of this argument points to a valid layout object that may be used
    by other layout functions. The returned layout object is initialized to an
    initial state that defines the behavior of the layout functions. The
    default initial state is described in the layout values section.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutCreateObject ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         layout object points to a valid handle.

      Other
         An error occurred.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutCreateObject ΓòÉΓòÉΓòÉ

none.


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutCreateObject ΓòÉΓòÉΓòÉ

The layout object is an opaque object containing all the data and methods
necessary to perform the layout operations on context dependent/directional
characters of the locale name.

When the LayoutCreateObject function completes without errors, the value of the
layout object argument points to a valid layout object that may be used by
other layout functions.

The returned layout object is initialized to a default state that defines the
behavior of the layout functions. The initial state is locale dependent and is
described by the layout values that may be queried using the LayoutQueryValues
function.

The layout values of the layout object may be changed using the LayoutSetValues
function.


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutCreateObject ΓòÉΓòÉΓòÉ

This example creates a layout object.

#include <layout.h>

LAYOUT_OBJECT plh;
ULONG RC;

  RC= LayoutCreateObject (Locale_Arabic,&plh);   /* or: Locale_Hebrew */

  if (RC) { printf("Create Error! !!\n"); exit(0);}


ΓòÉΓòÉΓòÉ <hidden> Related Functions - LayoutCreateObject ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutDestroyObject
   o  LayoutEditShape
   o  LayoutQueryValues
   o  LayoutSetValues
   o  LayoutTransformText


ΓòÉΓòÉΓòÉ 17.2.2. LayoutDestroyObject ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutDestroyObject ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutDestroyObject ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function releases all the resources*/
/* of a layout object obtained by the      */
/* LayoutCreateObject function.            */
/*******************************************/

#define INCL_LAYOUT
#include <layout.h>

LAYOUT_OBJECT   plh;       /* Layout object handle */
APIRET          RC;        /* Return value */

     RC  =  LayoutDestroyObject ( plh );


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutDestroyObject ΓòÉΓòÉΓòÉ

 plh  (LAYOUT_OBJECT) - input
    Layout object handle.

    This argument specifies a layout object returned by the LayoutCreateObject
    function.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutDestroyObject ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         All resources associated with layout object were successfully
         deallocated.

      Other
         An error occurred.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutDestroyObject ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutDestroyObject ΓòÉΓòÉΓòÉ

none.


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutDestroyObject ΓòÉΓòÉΓòÉ

This example creates and then destroys a layout object.

#include <layout.h>
LAYOUT_OBJECT plh;
ULONG RC;

  RC= LayoutCreateObject (Locale_Arabic,&plh);     /* or: Locale_Hebrew */
  if (RC) { printf("Create Error! !!\n"); exit(0);}

  RC = LayoutDestroyObject(plh);
  if (RC) { printf(" DESTROY Error!!!\n"); exit(0);}


ΓòÉΓòÉΓòÉ <hidden> Related Functions - LayoutDestroyObject ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutCreateObject
   o  LayoutEditShape
   o  LayoutQueryValues
   o  LayoutSetValues
   o  LayoutTransformText


ΓòÉΓòÉΓòÉ 17.2.3. LayoutEditShape ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutEditShape ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutEditShape ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function edits the shapes of       */
/* the characters pointed to by the        */
/* index parameters.                       */
/*******************************************/

#define INCL_LAYOUT
#include <layout.h>

LAYOUT_OBJECT  plh;     /* Layout object handle */
BOOL           EditType;/* Type of editing */
PULONG         index;   /* Cursor position - in bytes units */
PUCHAR         InpBuf;  /* Input text   */
PULONG         InpSize; /* Size of InpBuf - number of bytes */
PVOID          OutBuf;  /* Output text  */
PULONG         OutSize; /* Size of OutBuf - number of bytes */
APIRET         RC;      /* Return value */

     RC  =  LayoutEditShape ( plh, EditType, index, InpBuf, InpSize,
                              OutBuf, OutSize);


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutEditShape ΓòÉΓòÉΓòÉ

 plh  (LAYOUT_OBJECT) - input
    Layout object handle.

    This argument specifies a layout object returned by the LayoutCreateObject
    function.

 EditType  (BOOL) - input
    Type of editing.

    The EditType argument specifies the type of edit shaping that is desired.
    The following are possible values:

      EditInput
         When EditType specifies EditInput, it will read the current code
         element as defined by index and any preceding (front) code elements as
         defined by ShapeContextSize layout value.

      EditReplace
         When EditType specifies EditReplace, it will read the current code
         element as defined by index and any surrounding (front and/or back)
         code as defined by ShapeContexSize layout value.

    Note: the direction of the editing (i.e. layout values - Orientation and
    TypeOfText <VISUAL> is what determines which are the preceding and which
    are the succeeding code elements.

    When ActiveShapeEditing is set (True) the layout object maintains an
    "EditInput state" that may affect subsequent calls to the LayoutEditShape
    function with EditInput EditType. The EditInput state is not affected when
    EditType is set to EditReplace. To reset the EditInput state to its initial
    state these functions should be called with InpBuf set to NULL. The
    EditInput state is not affected if any error occurs within the
    LayoutEditShape is EditInput.

 index  (PUCHAR) - input
    Cursor position - in bytes units.

    On input the index argument specifies an offset to the start of a code
    element in InpBuf that will be the base for the editing. In addition, the
    context of surrounding code elements may be considered where the minimum
    set of code elements needed for the specific context dependent script(s) is
    identified by the ShapeContextSize layout value. If the set of surrounding
    code elements as defined by index, InpBuf and InpSize is less then the size
    of front/back of the ShapeContextSize, the LayoutEditShape functions will
    assume there is no additional context available. It is the caller's
    responsibility to provide the minimum context if available. The index
    argument is in units associated  with type of InpBuf, i.e. bytes for
    LayoutEditShape

 InpBuf  (PVOID) - input
    Input text.

    The InpBuf argument specifies the source to be processed. A NULL value with
    EditInput EditType indicates a request to reset the EditInput state to its
    initial state.

 InpSize  (PULONG)
    Size of InpBuf - number of bytes.

    On input, the InpSize argument specifies the number of code elements to be
    processed in units associated with the type , i.e. bytes for
    LayoutEditShape. A value of - 1 indicates that input is delimited by a NULL
    code element. On return, the value is modified to the actual number of code
    elements that needed shaping in InpBuf. A value of zero(0) when EditType is
    EditInput indicates that the EditInput state should be reset to its initial
    state.

 OutBuf  (PVOID) - output
    Output text.

    The OutBuf argument contains the shaped output text. This argument can be
    specified as a NULL pointer to indicate that no transformed text is
    required. If NULL, the functions will still return the index and InpSize
    that specify the amount of text required to be redrawn.

 OutSize  (PULONG) - output
    Size of OutBuf - number of bytes.

    On input, the OutSize argument specifies the size of the output buffer in
    number of bytes. Only the code elements required to be shaped are written
    into OutBuf. The Output buffer should be large enough to contain the shaped
    result; otherwise, only partial shaping will be performed. If the
    ActiveShapeEditing layout value is set(True) the OutBuf should be allocated
    to contain at least:

    number of InpBuf code element

    On return, the OutSize argument is modified to the actual number of bytes
    placed in OutBuf.

    When the OutSize argument is specified as zero,the function will calculate
    the size of an output buffer large enough to contain the transformed text
    from the input buffer, and the result will be returned in this field. The
    content of the buffers specifies by InpBuf and OutBuf, and the value of
    InpSize, will remain unchanged.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutEditShape ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         The function completed without errors.

      LAYOUT_E2BIG
         The output buffer is too small and the source text was not processed.
         Index and InpSize are not guaranteed on return.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutEditShape ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutEditShape ΓòÉΓòÉΓòÉ

 The LayoutEditShape provides the shapes of the code element pointed to by
index along with any surrounding code elements as defined by the
ShapeContextSize layout value of the layout object defined by layout_object.
the LayoutEditShape functions are intended to be used when performing editing
operations on a single code element, e.g. insertion or deletion of a single
code element. The LayoutTransform function should be used when doing string
shaping. The LayoutEditShape function does not affect any state maintained by
the LayoutTransform functions.

When the LayoutEdiShape funtions completes without errors a zero is returned,
index and InpSize return the minimum set of code elements required to be
redrawn, and if OutBuf is not NULL the respective shaped code elements are
written into OutBuf. Any portion of the the InpBuf may be indicated as needing
to be redrawn/shaped. Otherwise, if an error occurs a non-zero value is
returned and any output values depend on the error code.


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutEditShape ΓòÉΓòÉΓòÉ

This example shows how to use the LayoutEditShape function to reshape the input
characters.

#include <layout.h>

LAYOUT_OBJECT plh;

UCHAR InpBuf[30];
UCHAR OutBuf[30];

ULONG InpSize = 30;
ULONG OutSize = 30 ;
LAYOUT_VALUES layout[2];
LAYOUT_TEXT_DESCRIPTOR Descr;
ULONG index ;
ULONG RC;

   RC= LayoutCreateObject (Locale_Arabic,&plh);      /* or: Locale_Hebrew */
   if (RC) { printf("Create Error! !!\n"); exit(0);}

   /* Define the LayoutValues that will need changing */
   layout[0].name= TypeOfText|Orientation;
   layout[0].value=descr;

   /* using the OR operator, we set the bits in the Layout Descriptor
    * to describe the orientation of the buffer and the Type of Text
    * that we want for the output */

   descr.in=TEXT_VISUAL|ORIENTATION_LTR;
   descr.out=TEXT_VISUAL|ORIENTATION_LTR;
   layout[1].name=0;           /* End of change */

   /* Set the LayoutValues   */
     RC=LayoutSetValues(plh,layout,&index);

     if (RC)
     {
           printf("SetValue Error at index %d !!!\n",index);
           exit(0);
      }


  /* Here we point to the character were we want to shape */
  index = 4L;
   RC=LayoutEditShape(plh,
                      TRUE,
                      &index,
                      InpBuf,
                      &InpSize,
                      OutBuf,
                      &OutSize);

    RC = LayoutDestroyObject(plh);
    if (RC) { printf(" DESTROY Error!!!\n"); exit(0);}


ΓòÉΓòÉΓòÉ <hidden> Related Functions - LayoutEditShape ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutCreateObject
   o  LayoutDestroyObject
   o  LayoutQueryValues
   o  LayoutSetValues
   o  LayoutTransformText


ΓòÉΓòÉΓòÉ 17.2.4. LayoutQueryValues ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutQueryValues ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutQueryValues ΓòÉΓòÉΓòÉ

/****************************************/
/* This function queries the current    */
/* setting of Layout values within a    */
/* layout object.                        */
/****************************************/

#define INCL_LAYOUT
#include <layout.h>

LAYOUT_OBJECT  plh;              /* Layout object handle */
LAYOUT_VALUES  values[3];        /* Array of layout values to be queried */
PULONG         index_returned;   /* Value causing the error */
APIRET         RC;               /* Return value */

     RC  =  LayoutQueryValues ( plh, values, index_returned);


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutQueryValues ΓòÉΓòÉΓòÉ

 plh  (LAYOUT_OBJECT) - input
    Layout object handle.

    This argument specifies a layout object returned by the LayoutCreateObject
    function.

 values  (PLAYOUT_VALUES) - input
    Array of layout values to be queried.

    The name field contains the name of the layout value to be queried, and the
    value field is a pointer to a location where the layout value is to be
    stored.

 index_returned  (PULONG) - output
    Value causing the error.

    If any values can not be queried, then the value of the one causing the
    error is returned in the index and a non-zero value is returned.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutQueryValues ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         All layout values were successfully queried.

      index_returned
         The layout value specified by index_returned is unknown or the
         argument Layout_Object is invalid.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutQueryValues ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutQueryValues ΓòÉΓòÉΓòÉ

Each value element of a LAYOUT_VALUES record must contain a pointer to the type
of the layout value that is being set or get. That is, if the layout value is
for type T, the arguement must be of type T*.

If CallerAllocMem is FALSE (default), LayoutQueryValues will allocate storage
for the returned data. It is the caller's responsibility to free the allocated
memory with DosFreeMem.

If CallerAllocMem is TRUE, LayoutQueryValues will assume that the layout value
points to allocated memory. I.e. the caller is responsible for allocating and
freeing the memory for the queried data.


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutQueryValues ΓòÉΓòÉΓòÉ

This example first sets the values of an existing layout object then queries
these values using the LayoutQueryValues function.

#include <layout.h>

LAYOUT_OBJECT plh;
LAYOUT_VALUES layout[3];
LAYOUT_TEXT_DESCRIPTOR Descr;
PLAYOUT_TEXT_DESCRIPTOR Pdescr ;
BOOL CallerAllocate;
ULONG index;
ULONG RC;



  layout[0].name= CallerAllocMem;

  layout[0].value=&CallerAllocate;

  CallerAllocate = TRUE ;

  layout[1].name = 0 ;

  /* Set the LayoutValues   */
  RC=LayoutSetValues (plh,layout,&index);

  if (RC)
  {
        printf("SetValue Error at index %d !!!\n",index);
        exit(0);
  }

  Pdescr = (PLAYOUT_TEXT_DESCRIPTOR)malloc(sizeof (LAYOUT_TEXT_DESCRIPTOR));
  layout[0].name  =  Orientation;
  layout[0].value =  Pdescr;

  layout[1].name=0;           /* End of change */

  RC = LayoutQueryValues(plh,layout,&index);
  if (RC)
  {
        printf("QueryValue Error at index %d !!!\n",index);
        exit(0);
  }
  printf("Orientation in = %lx  out = %lx",Pdescr->in,Pdescr->out);

  free(Pdescr);

  RC = LayoutDestroyObject(plh);
  if (RC) { printf(" DESTROY Error!!!\n"); exit(0);}
 ************************************************************


ΓòÉΓòÉΓòÉ <hidden> Related Functions - LayoutQueryValues ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutCreateObject
   o  LayoutDestroyObject
   o  LayoutEditShape
   o  LayoutSetValues
   o  LayoutTransformText


ΓòÉΓòÉΓòÉ 17.2.5. LayoutSetValues ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutSetValues ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutSetValues ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function is used to change the     */
/* layout values of a layout Object.       */
/*******************************************/

#define INCL_LAYOUT
#include <layout.h>

LAYOUT_OBJECT  plh,             /* Layout object handle */
PLAYOUT_VALUES values,          /* Array of layout values to be set */
PULONG         index_returned   /* Value causing the error */
APIRET         RC;              /* Return value */

     RC  =  LayoutSetValues ( plh, values, index_returned );


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutSetValues ΓòÉΓòÉΓòÉ

 plh  (LAYOUT_OBJECT) - input
    Layout object handle.

    This argument specifies a layout object returned by the LayoutCreateObject
    function.

 values  (PLAYOUT_VALUES) - input
    Array of layout values to be set.

    The name field contains the name of the layout value to be set, and the
    value field is a pointer to a location where the layout value is to be
    stored.

 index_returned  (PULONG) - output
    Value causing the error.

    If any values can not be set, then the value of the one causing the error
    is returned in the index and a non-zero value is returned.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutSetValues ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         All layout values were successfully set.

      index_returned
         The layout value specified by index_returned is unknown or its value
         is invalid or the argument Layout_Object is invalid.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutSetValues ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutSetValues ΓòÉΓòÉΓòÉ

The values are written into the layout object and may affect the behavior of
subsequent layout functions. Some layout values do alter internal states
maintained by a layout_object.

When the LayoutSetvalues function completes without errors all values will have
been set in the Layout_Object and a zero is returned.


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutSetValues ΓòÉΓòÉΓòÉ

This example creates then sets the values for a layout object.

#include <layout.h>

LAYOUT_OBJECT plh;
LAYOUT_VALUES layout[2];
LAYOUT_TEXT_DESCRIPTOR Descr;
ULONG index;
ULONG RC;


  RC= LayoutCreateObject (Locale_Arabic,&plh);    /* or: Locale_Hebrew */
  if (RC) { printf("Create Error! !!\n"); exit(0);}
  layout[0].name = TypeOfText ;
  layout[0].value = &Descr ;


  Descr.in  = TEXT_IMPLICIT;
  Descr.out = TEXT_VISUAL;

  layout[1].name = 0 ;

  /* Set the LayoutValues   */
  RC=LayoutSetValues (plh,layout,&index);


  if (RC)
  {
        printf("SetValue Error at index %d !!!\n",index);
        exit(0);
   }
  RC = LayoutDestroyObject(plh);
  if (RC) { printf(" DESTROY Error!!!\n"); exit(0);}


ΓòÉΓòÉΓòÉ <hidden> Related Functions - LayoutSetValues ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutCreateObject
   o  LayoutDestroyObject
   o  LayoutEditShape
   o  LayoutQueryValues
   o  LayoutTransformText


ΓòÉΓòÉΓòÉ 17.2.6. LayoutTransformText ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Topics - LayoutTransformText ΓòÉΓòÉΓòÉ

Select an item:

      Function Syntax
      Parameters
      Return Values
      Notes
      Example
      Related Functions


ΓòÉΓòÉΓòÉ <hidden> Syntax - LayoutTransformText ΓòÉΓòÉΓòÉ

/*******************************************/
/* This function transforms the Inpbuf     */
/* text according to the current layout    */
/* values.                                 */
/*******************************************/

#define INCL_LAYOUT
#include <layout.h>

LAYOUT_OBJECT  plh;       /* Layout Object handle */
PUCHAR         InpBuf;    /* Input text  */
PULONG         InpSize;   /* Size of InpBuf-number of bytes */
PVOID          OutBuf;    /* Output text */
PULONG         OutSize;   /* Size of outBuf-number of bytes */
PULONG         InpToOut;  /* Source to target index array */
PULONG         OutToInp;  /* Target to source index array */
PUCHAR         BidiLevel; /* Bidirectional levels array */
APIRET         RC;        /* Return value */

     RC  =  LayoutTransformText ( plh, InpBuf, InpSize, OutBuf, OutSize,
                                  InpToOut, OutToInp, BidiLevel);


ΓòÉΓòÉΓòÉ <hidden> Parameters - LayoutTransformText ΓòÉΓòÉΓòÉ

 plh  (LAYOUT_OBJECT) - input
    Layout object handle.

    The plh argument specifies a layout object returned by the
    LayoutCreateObject function.

 InpBuf  (PUCHAR) - input
    Input text.

    The InpBuf argument specifies the source text to be processed. The InpBuf
    may not be NULL.

 InpSize  (PULONG) - input
    Size of InpBuf-number of bytes.

    The InpSize argument specifies the number of code elements to be processed
    in units associated with the type, i.e. bytes for LayoutTransform. A value
    of-1 indicates that input is delimited by a NULL code element.  On return,
    the value is modified to the actual number of code elements processed in
    InBuf (unless the value in OutSize is zero, in which case, the value of
    InpSize is not changed).

 OutBuf  (PVOID) - output
    Output text.

    The OutBuf argument contains the transformed data.  This argument can be
    specified as a Null pointer to indicate that no transformed data is
    required.

 Outsize  (PULONG) - output
    Size of outBuf-number of bytes.

    On input, the OutSize argument specifies the size of the output buffer in
    number of bytes.  The output buffer should be large enough to contain the
    transformed result; otherwise, only a partial transformation will be
    performed.  If the ActiveShapeEditing layout value is set (True) the OutBuf
    is recommended to be  allocated to contain at least.

       number of code element

    On return, the OutSize argument is modified to the actual number of bytes
    placed in OutBuf.

    When the OutSize argument is specified as zero, the function will calculate
    the size of an output buffer large enough to contain the transformed text,
    and the result will be returned in this field. The content of the buffers
    specified by InpBuf and OutBuf, and a value of InpSize, will remain
    unchanged.

 InpToOut  (PULONG)
    Source to target index array.

    If the InpToOut argument is not a Null pointer, it represents an array of
    values with the same number of code elements as InpBuf. On output, the nth
    value in InpToOut corresponds to the nth code element in InpBuf.

 OutToInp  (PULONG) - input
    Target to source index array.

    If the OutTolnp argument is not a NULL pointer, it represents an array of
    values with the same number of code elements as contained in OutBuf.  On
    output, the nth value in OutTolnp corresponds to the nth element in OutBuf.
    This value is the index in InpBuf which identifies the original code
    element of the nth element in OutBuf.  OutTolnp may be specified as NULL if
    no index array from OutBuf to InpBuf is desired.

 BidiLevel  (PUCHAR) - input
    Bidirectional level array.

    If the BidiLevel argument is not a NULL pointer, it represents an array of
    values with the same number of elements as the source text.  The nth value
    in BidiLevel corresponds to the nth code element in InpBuf.  This value is
    the level of this code element as determined by the bidirectional
    algorithm.  BidiLevel may be specified as NULL if a levels array is not
    desired.


ΓòÉΓòÉΓòÉ <hidden> Return Values - LayoutTransformText ΓòÉΓòÉΓòÉ

 RC(APIRET) - return
    Success indicator.

      0
         The function completed without errors.

      LAYOUT_E2BIG
         The output buffer is full and the source text was not entirely
         processed.


ΓòÉΓòÉΓòÉ <hidden> Errors - LayoutTransformText ΓòÉΓòÉΓòÉ


ΓòÉΓòÉΓòÉ <hidden> Notes - LayoutTransformText ΓòÉΓòÉΓòÉ

The LayoutTransform function transforms the InpBuf text according to the
current layout values in layout object.  Any layout value whose value type is
LayoutTextDisriptor describes the attributes of the InpBuf and OutBuf. If the
attributes are the same of both InpBuf and OutBuf then a null transformation is
done with respect to that specific layout avalue.

The output of this functions may be one or more of the following depending on
the setting of the respective arguments:

 OutBuf/Outsize
    any transform data is stored into OutBuf.

 InpToOut
    a cross reference from each InpBuf code element to the transformed data.

 OutToInp
    a cross reference to each InpBuf code element from the transformed data.

 BidiLevel
    a weighted value that represents the directional level of each InpBuf code
    element.  The level is dependent on the internal directional algorithm of
    the layout object.

 Each of these output arguments maybe NULL to specify that no output is desired
 for the specific argument, but at least one of them should be set to non-NULL
 to perform any significant work.

 When the size of OutBuf is not large enough to contain the entire transformed
 text, the input text state at the end of the error condition LAYOUT_E2BIG is
 returned.  To resume the transformation on the remaining text, the application
 should call the LayoutTransform function with the same layout object, the same
 InpBuf, and Inpsize is set to zero (0).


ΓòÉΓòÉΓòÉ <hidden> Example - LayoutTransformText ΓòÉΓòÉΓòÉ

This example creates a layout object then defines the values that need to be
changed and uses the LayoutTransformText function to change them.

#include <layout.h>

LAYOUT_OBJECT plh;

UCHAR InpBuf[30];
UCHAR OutBuf[30];
UCHAR BidiLvl[30];
ULONG ToOutBuf[30];
ULONG ToInpBuf[30];
ULONG InpSize = 30  ;
ULONG OutSize = 30   ;
LAYOUT_VALUES layout[2];
LAYOUT_TEXT_DESCRIPTOR Descr;
ULONG index;
ULONG RC;

    RC= LayoutCreateObject (Locale_Arabic,&plh);  /* or: Locale_Hebrew */
    if (RC) { printf("Create Error! !!\n"); exit(0);}

   /* Define the LayoutValues that will need changing */
    layout[0].name= TypeOfText|Orientation|Numerals|TextShaping;
    layout[0].value = &Descr ;


   /* using the OR operator, we set the bits in the Layout Descriptor,
    * to describe the input string attributes, it is RTL, contains
    * Arabic numerals, and it is in Base shapes */

   Descr.in=TEXT_IMPLICIT|ORIENTATION_RTL|NUMERALS_NOMINAL|TEXT_NOMINAL;


   /* Now let's compose the Text Descriptor for the output string to be
    * LTR, Hindu numeral, and Shaped (Automatic Shape Determination) */

   Descr.out=TEXT_VISUAL|ORIENTATION_LTR| NUMERALS_CONTEXTUAL|TEXT_SHAPED;

    layout[1].name = 0 ;

    /* Set the LayoutValues   */
    RC=LayoutSetValues (plh,layout,&index);

  /* calling the function.. to convert the string */
    RC=LayoutTransformText (plh,
                      InpBuf,
                      &InpSize,
                      OutBuf,
                      &OutSize,
                      ToOutBuf,
                      ToInpBuf,
                      BidiLvl);

    if (RC) { printf("Transform Error %d!!!\n",RC); exit(0);}


  RC = LayoutDestroyObject(plh);
  if (RC) { printf(" DESTROY Error!!!\n"); exit(0);}
 ************************************************************


ΓòÉΓòÉΓòÉ <hidden> Related Functions  - LayoutTransformText ΓòÉΓòÉΓòÉ

Related Functions

   o  LayoutCreateObject
   o  LayoutDestroyObject
   o  LayoutEditShape
   o  LayoutQueryValues
   o  LayoutSetValues