Overview
 About the User-Interface Functions
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 This section holds some general functions, written in Clipper 5.01, that can
 be of use when designing the User Interface section of the Application. This
 is a section of the Expand Library where one can expect all kind of
 functions generally not found in this library. They are all "High
 Level" functions, written in Clipper, as an aid to making Clipper
 Applications. If and when you decide not to use these functions in your
 Application, then don't use any. Otherwise, just use them as much as
 possible, as all of the routines are automatically included when using one
 of the function presented here (All is in a few OBJs, no granularity).

 Note the use of it's own Coloring scheme, XPcolor(), which takes over the
 definition from SetColor(), converts to Attributes and uses those for
 writing. Note also the posiibility to change the Inkey() handler to one's
 own handler.

 Note also that, when a Mouse driver is present, these functions will use the
 mouse for all Menu functions (XPask(), XPmenu(), XPpullMenu()). If you
 do not want to support the Mouse, one can set globally the mouse off with the
 XPmouseSet() function. By default, the mouse is thus On (But only when a
 Driver is installed, of course!).

 All the functions are scarcely documented, because they are not intended as
 a "real" part of the core of the Library, but just use it's features. See
 the source code for more insight in their usage, generally presented for the
 sake of clarity.