Int 15 Fn 12  - Topview - Send Message - "handle" - Return Object Handle   [Q]

   AH = 12h
   BH = 00h
   BL = which handle to return
       00h handle in DWORD on top of stack
       01h current task's window handle
       02h given task's mailbox handle (task's handle on stack)
       03h current task's mailbox handle
       04h given task's keyboard handle (task's handle on stack)
       05h current task's keyboard object handle
       06h given task's OBJECTQ handle (task's handle on stack)
       07h current task's OBJECTQ handle
       08h   \
         thru > return 0000:0000 under DV < 2.26
       10h   /
       0Ch (2.26+) task owning object with handle in DWORD on top of stack
       0Dh (2.26+) task handle of owner (parent) of current task

Return: DWORD on top of stack is object handle

Note:  BL=0Ch,0Dh returns 00000000h if the object is not open (keyboard,
     mailbox, panel, pointer, and timer objects) or is an orphan (task,
     window)

See Also: AH=12h/BH=02h,AH=12h/BH=80h