Win95/NT

I've created a taskbar application that appears at the top of the screen
and works like Microsoft's Taskbar.  If the Microsoft Taskbar is set to
'AutoHide = False', the window frame for maximized apps will fill the
screen above the Taskbar.  I would like to have my app able to stay visible
across the top of the screen while any other maximized window fills only
the screen area below it.  Any advice on how this is done would be greatly
appreciated.