Category: <b>DOS extenders</b>
<br>Flags: available only in protected mode<p>
<pre><b>INT 31 - DPMI 0.9+ - LOCK SELECTOR</b>

	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
SeeAlso: AX=0005h,AX=0600h
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