Int 2F Fn DE0C  C - Desqview V2.26+ External Dev Interface - Swap Out Pro  [Q]

   AX = DE0Ch
   BX = mapping context of task being swapped out
         (see #0342 at INT 15/AX=1016h)
   DX = handle of DESQview system task

Note:  driver should pass this call to previous handler after processing it