Overview
 About the "Low Level" Mouse Routines:
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 The Expand Library comprises a set of functions that make controlling
 the Mouse in text mode possible. The Functions found in this part of
 the documentation are all 'Low Level' Mouse functions, meaning that they
 perform some simple task directly on the Mouse Driver (MOUSE.COM
 generally). The routines in the next section ('High Level' Mouse
 functions) all use the primary functions of this part to interface with
 the Mouse.

 The routines in this section (and in all of the Expand Library, in fact)
 are designed for Text mode use, not graphics. If you switch between graphics
 and text, save the Mouse state with XPmousePush()/XPmousePop(), or use
 XPmouseInit() or XPmouseReset() to reset to "normal" when exiting from
 graphics.

 Programming the Mouse is quite special and can be confusing some times,
 Read the documentation to be well informed, and for some tips.

 Note that the functions here have no direct effect on the Video, except
 for the Mouse Cursor itself.

 By default, the Mouse is ON, if, however, you want your application to ignore
 the mouse completely, set the mouse off using the XPmouseSet() function.