Int 31 Fn 0004 P - DPMI 0.9+ - Lock Selector [E] AX = 0004h BX = selector to lock (prevent paging) Return: ??? Note: although marked as reserved in versions 0.9 and 1.0 of the DPMI specification, this function is called by MS Windows TASKMAN, PROGMAN, and KERNEL See Also: AX=0005h,AX=0600h