Int 15 Fn 12  - Topview - Send Message - "subfrom" - Remove Object From O  [Q]

   AH = 12h
   BH = 0Bh
   BL = OBJECTQ from which to remove all copies of a particular object
       06h OBJECTQ of task whose handle is on top of stack
       07h task's default OBJECTQ
   STACK:  DWORD   handle of object to remove

Note:  should be sent whenever an object is erased or closed