INT 2F - DESQview v2.26+ External Device Interface - TERMINATE TASK
        AX = DE07h
        BX = mapping context of process containing task
        DX = handle of task
Notes:  driver should pass this call to previous handler before processing it
        all DOS, BIOS, and DV API calls except those generating a task switch
          are valid in handler
SeeAlso: AX=DE06h,AX=DE10h