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GlobalReAlloc        Adjust Size of Allocated Global Memory Block

handle GlobalReAlloc(hMem, dwBytes, wFlags)
HANDLE hMem;
DWORD dwBytes; /* New Size */
WORD wFlags;

             wFlags
        |-----------------|
        | GMEM_DISCARDABLE|
        | GMEM_MODIFY     |
        | GMEM_MOVEABLE   |
        | GMEM_NOCOMPACT  |
        | GMEM_NODISCARD  |
        | GMEM_ZEROINIT   |
        +-----------------+

Returns:    HANDLE to reallocated global block or NULL if error.

Note:       Return value equals hMem unless GMEM_MOVEABLE or error.