Int 16 Fn 05  - Keyboard - Store Keystroke In Keyboard Buffer (at/ps W En  [B]

   AH = 05h
   CH = scan code
   CL = ASCII character

Return: AL = 00h if successful
        01h if keyboard buffer full

Note:  under DESQview, the following "keystrokes" invoke the following
     actions when they are read from the keyboard buffer:
       38FBh or FB00h  switch to next window (only if main menu
               popped up)
       38FCh or FC00h  pop up DESQview main menu
       38FEh or FE00h  close the current window
       38FFh or FF00h  pop up DESQview learn menu

See Also: AH=00h,AH=71h,AH=FFh,INT 15/AX=DE10h