HANDLE GlobalLRUOldest(hMem)
This routine moves the global memory object identified by hMem to the oldest least-recently-used (LRU) position in memory and, in so doing, makes it the next candidate for discarding.
| Parameter | Type/Description | 
| hMem | HANDLE Identifies the global memory object to be moved. | 
The return value is NULL if the hMem parameter does not specify a valid handle.
This function is useful only if hMem is discardable.