DeskTop Variable

wingraph.h

WINDOW *const DeskTop;

A pointer to the desktop window.

DeskTop is a constant static pointer (i.e. it can't be changed, but the structure pointed to by it may be changed) which points to the desktop window. This is a window without a border which occupies the whole screen area except the status line, but the clipping area of this window is set to exclude the area occupied by the toolbar menu, so you can not draw over the menu area if you use this window as a parameter to any window drawing function (except if you changed Clip field of the structure pointed to by DeskTop manually). Usually, if you want to use a function which expects a parameter which is a pointer to a window structure, but if you don't want to create your own window, you can pass DeskTop as the parameter to it (of course, if you don't need to draw something in the menu or status line area).