INT 15 - DESQview 2.20+ - SEND MESSAGE - "SETPRI" - SET PRIORITY WITHIN OBJECTQ
        AH = 12h
        BH = 06h
        BL = object
            00h object handle in DWORD on top of stack
                mailbox, keyboard, pointer, or timer
                (DV 2.50+) window
            01h (DV 2.50+) current task's window
            04h given task's keyboard (task's handle on top of stack)
            05h current task's default keyboard
        STACK: DWORD new priority of object in task's OBJECTQ
                        (new priority of task if window handle)
Notes:  initially all objects have the same default value.  Should only make
          relative adjustments to this default value.
        when changing priorities, all objects already on the objectq are
          reordered
        for window handles, only the non-blocked task(s) with the highest
          priority receive CPU time under DESQview 2.50-2.52; the default
          priority is 0Ah
SeeAlso: AH=12h/BH=87h