C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
_vlockcnt
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _vlockcnt function returns the number of times a virtual
     memory block has been locked. The argument <handle> points to a
     virtual memory block previously allocated through a call to
     _vmalloc or _vrealloc. Use the _vlockcnt function to ensure that
     a block is unlocked before it is freed using _vfree.
 
     Return Value
 
     The _vlockcnt function returns the number of blocks held on the
     specified virtual memory block.
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