Int 15 Fn 12  - Desqview V2.42-2.52 - Bug                                  [Q]

   AH = 12h
   BH = 17h
   BL = object
       00h DWORD on top of stack
       mailbox, keyboard, or pointer only
       02h mailbox for task whose handle is on top of stack
       03h mailbox for current task
       04h keyboard for task whose handle is on top of stack
       05h keyboard for current task

Notes: due to a fencepost error, message 17h is accepted for mailboxes,
     keyboards, and pointers, but causes a random branch
   DESQview v2.50-2.52 are distributed as part of DESQview/X v1.02