The GlobalFlags function returns information about the specified global memory object.
UINT GlobalFlags(
HGLOBAL hMem |
// handle to the global memory object |
); |
If the function succeeds, the return value is a 32-bit value specifying the allocation flags and the lock count for the memory object.
If the function fails, the return value is the GMEM_INVALID_HANDLE flag, indicating that the global handle is not valid. To get extended error information, call GetLastError.
The low-order byte of the low-order word of the return value contains the lock count of the object. To retrieve the lock count from the return value, use the GMEM_LOCKCOUNT mask with the bitwise AND (&) operator. The lock count of memory objects allocated with the GMEM_FIXED flag is always zero.
The high-order byte of the low-order word of the return value indicates the allocation flags of the memory object. It can be zero or any combination of the following flags:
Flag |
Meaning |
GMEM_DDESHARE |
Memory was allocated for use by the dynamic data exchange (DDE) functions. Unlike Windows version |
GMEM_DISCARDABLE |
The object’s memory block can be discarded. |
GMEM_DISCARDED |
The object’s memory block has been discarded. |
GlobalAlloc, GlobalDiscard, GlobalLock, GlobalReAlloc, GlobalUnlock, LocalFlags
file: /Techref/os/win/api/win32/func/src/f43_16.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2024/8/16 11:30,
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