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RTLWIN16.PAK
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CPL.H
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C/C++ Source or Header
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1997-05-06
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/*****************************************************************************\
* *
* cpl.h - Control panel extension DLL definitions *
* *
* Version 3.10 *
* *
******************************************************************************
* General rules for being installed in the Control Panel:
*
* 1) The DLL must export a function named CPlApplet which will handle
* the messages discussed below.
* 2) If the applet needs to save information in CONTROL.INI minimize
* clutter by using the application name [MMCPL.appletname].
* 2) If the applet is refrenced in CONTROL.INI under [MMCPL] use
* the following form:
* ...
* [MMCPL]
* uniqueName=c:\mydir\myapplet.dll
* ...
*
*
* The order applet DLL's are loaded by CONTROL.EXE is:
*
* 1) MAIN.CPL is loaded from the windows system directory.
*
* 2) Installable drivers that are loaded and export the
* CplApplet() routine.
*
* 3) DLL's specified in the [MMCPL] section of CONTROL.INI.
*
* 4) DLL's named *.CPL from windows system directory.
*
*/
/* $Copyright: 1994$ */
#ifndef _INC_CPL
#define _INC_CPL
#define __CPL_H
#include "pshpack1.h"
#ifdef __cplusplus
extern "C" { /* Assume C declarations for C++ */
#endif /* __cplusplus */
/*
* CONTROL.EXE will answer this message and launch an applet
*
* WM_CPL_LAUNCH
*
* wParam - window handle of calling app
* lParam - LPTSTR of name of applet to launch
*
* WM_CPL_LAUNCHED
*
* wParam - TRUE/FALSE if applet was launched
* lParam - NULL
*
* CONTROL.EXE will post this message to the caller when the applet returns
* (ie., when wParam is a valid window handle)
*
*/
#define WM_CPL_LAUNCH (WM_USER+1000)
#define WM_CPL_LAUNCHED (WM_USER+1001)
/* A function prototype for CPlApplet() */
typedef LRESULT (CALLBACK *APPLET_PROC)(HWND hwndCpl, UINT msg, LPARAM lParam1, LPARAM lParam2);
/* The data structure CPlApplet() must fill in. */
typedef struct tagCPLINFO
{
int idIcon; /* icon resource id, provided by CPlApplet() */
int idName; /* name string res. id, provided by CPlApplet() */
int idInfo; /* info string res. id, provided by CPlApplet() */
LONG lData; /* user defined data */
} CPLINFO, *PCPLINFO, FAR *LPCPLINFO;
typedef struct tagNEWCPLINFO
{
DWORD dwSize; /* similar to the commdlg */
DWORD dwFlags;
DWORD dwHelpContext; /* help context to use */
LONG lData; /* user defined data */
HICON hIcon; /* icon to use, this is owned by CONTROL.EXE (may be deleted) */
char szName[32]; /* short name */
char szInfo[64]; /* long name (status line) */
char szHelpFile[128];/* path to help file to use */
} NEWCPLINFO, *PNEWCPLINFO, FAR *LPNEWCPLINFO;
/* The messages CPlApplet() must handle: */
#define CPL_INIT 1
/* This message is sent to indicate CPlApplet() was found. */
/* lParam1 and lParam2 are not defined. */
/* Return TRUE or FALSE indicating whether the control panel should proceed. */
#define CPL_GETCOUNT 2
/* This message is sent to determine the number of applets to be displayed. */
/* lParam1 and lParam2 are not defined. */
/* Return the number of applets you wish to display in the control */
/* panel window. */
#define CPL_INQUIRE 3
/* This message is sent for information about each applet. */
/* lParam1 is the applet number to register, a value from 0 to */
/* (CPL_GETCOUNT - 1). lParam2 is a far ptr to a CPLINFO structure. */
/* Fill in CPL_INFO's idIcon, idName, idInfo and lData fields with */
/* the resource id for an icon to display, name and description string ids, */
/* and a long data item associated with applet #lParam1. */
#define CPL_SELECT 4
/* This message is sent when the applet's icon has been clicked upon. */
/* lParam1 is the applet number which was selected. lParam2 is the */
/* applet's lData value. */
#define CPL_DBLCLK 5
/* This message is sent when the applet's icon has been double-clicked */
/* upon. lParam1 is the applet number which was selected. lParam2 is the */
/* applet's lData value. */
/* This message should initiate the applet's dialog box. */
#define CPL_STOP 6
/* This message is sent for each applet when the control panel is exiting. */
/* lParam1 is the applet number. lParam2 is the applet's lData value. */
/* Do applet specific cleaning up here. */
#define CPL_EXIT 7
/* This message is sent just before the control panel calls FreeLibrary. */
/* lParam1 and lParam2 are not defined. */
/* Do non-applet specific cleaning up here. */
#define CPL_NEWINQUIRE 8
/* this is the same as CPL_INQUIRE execpt lParam2 is a pointer to a */
/* NEWCPLINFO structure. this will be sent before the CPL_INQUIRE */
/* and if it is responed to (return != 0) CPL_INQUIRE will not be sent */
#define CPL_DO_PRINTER_SETUP 100 /* ;Internal */
#define CPL_DO_NETPRN_SETUP 101 /* ;Internal */
/* This message is internal to the Control Panel and MAIN applets. */
/* It is only sent when an applet is invoked from the Command line */
/* during system installation. */
#define CPL_SETUP 200
#ifdef __cplusplus
}
#endif /* __cplusplus */
#include "poppack.h"
#endif /* _INC_CPL */