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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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CloseHandle
The CloseHandle function closes an open object handle.
BOOL CloseHandle(
HANDLE hObject
| // handle to object to close
| );
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Parameters
hObject
Identifies an open object handle.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
Remarks
The CloseHandle function closes handles to the following objects:
- Console input or output
- Event file
- File mapping
- Mutex
- Named pipe
- Process
- Semaphore
- Thread
- Token (Windows NT only)
CloseHandle invalidates the specified object handle, decrements the object's handle
count, and performs object retention checks. Once the last handle to an object is
closed, the object is removed from the operating system.
This function does not close module objects.
Use CloseHandle to close handles returned by calls to the CreateFile function. Use FindClose to close handles returned by calls to the FindFirstFile function.
Closing an invalid handle raises an exception. This includes closing a handle
twice, not checking the return value and closing an invalid handle, and using CloseHandle on a handle returned by FindFirstFile.
See Also
CreateFile, DeleteFile, FindClose, FindFirstFile
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