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

	AX = 0600h
	BX:CX = starting linear address
	SI:DI = size of region in bytes
Return: CF clear if successful
	CF set on error
	    none of the memory is locked
	    AX = error code (DPMI 1.0+) (8013h,8017h,8025h) (see <a href=../../it/43/31.html>#03143</a>)
Notes:	pages at beginning and end will be locked if the region overlaps them
	may be called multiple times for a given page; the DPMI host keeps a
	  lock count for each page
SeeAlso: AX=0004h,AX=0601h,INT 21/AX=251Ah,INT 21/AX=EB06h
</pre>