Int 2F Fn DE10  C - Desqview V2.50+ External Dev Interface - Free Task     [Q]

   AX = DE10h
   BX = mapping context of process (see #0342 at INT 15/AX=1016h)
   DX = task handle of process

Note:  DESQview 2.50+ calls this function before it frees the task; it is
     similar to AX=DE07h but allows the XDI handler to make calls which
     cause context switches

See Also: AX=DE06h,AX=DE07h