This IOCtl is for OS/2 mode only. The function passes to the physical mouse device driver the selector:offset address of the entry point of the session's pointer draw routine for OS/2-mode display support. The pointer image draw routine is an installed pseudo character device driver. The mouse router/handler must:

• Open the physical Pointer Draw device driver
  
• Query the physical Pointer Draw device driver for the address of its entry point
  
• Pass the resulting address of the pointer draw entry point to the physical mouse device driver using the IOCtl described above

The physical mouse device driver issues a Far-16 call to the physical Pointer Draw device driver when a mouse interrupt occurs that requires action concerning the pointer image.

In addition, the physical mouse device driver can call the pointer draw routine as a result of some action on the part of the application, such as:

• MouDrawPtr 
  MouRemovePtr
  
  MouSetPtrPos
  
  MouSetPtrShape
  
  MouGetPtrShape
  
  MouSetDevStatus

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