DECLAREINTEGER HeapUnlock IN kernel32;
[in] Handle to the heap to unlock.
If the function succeeds, the return value is nonzero.
Windows NT/2000/XP: Included in Windows NT 3.5 and later.
Windows 95/98/Me: Unsupported.
The HeapLock function is primarily useful for preventing the allocation and release of heap memory by other threads while the calling thread uses the HeapWalk function. The HeapUnlock function is the inverse of HeapLock.