Int 15 Fn DE29  U - Desqview/x - ???                                       [Q]

   AX = DE29h
   BX = 0005h
   ???

Return: CF clear if successful
       ???
   CF set on error

Note:  under DESQview 2.60, this function and all other subfunctions of
     AX=DE29h always return CF set, as they are unique to DESQview/X