GetWindowSubclass function
Retrieves the reference data for the specified window subclass callback.
Syntax
BOOL GetWindowSubclass( _In_ HWND hWnd, _In_ SUBCLASSPROC pfnSubclass, _In_ UINT_PTR uIdSubclass, _Out_ DWORD_PTR *pdwRefData );
Parameters
- hWnd [in]
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Type: HWND
The handle of the window being subclassed.
- pfnSubclass [in]
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Type: SUBCLASSPROC
A pointer to a window procedure. This pointer and the subclass ID uniquely identify this subclass callback.
- uIdSubclass [in]
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Type: UINT_PTR
UINT_PTR subclass ID. This ID and the callback pointer uniquely identify this subclass callback. Note: On 64-bit versions of Windows this is a 64-bit value.
- pdwRefData [out]
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Type: DWORD_PTR*
A pointer to a DWORD which will return the reference data. Note: On 64-bit versions of Windows, pointers are 64-bit values.
Return value
Type: BOOL
| Return code | Description |
|---|---|
|
The subclass callback was successfully installed. |
|
The subclass callback was not installed. |
Remarks
To use GetWindowSubclass, specify Comctl32.dll version 6 in the manifest. For more information on manifests, see Enabling Visual Styles.
Requirements
|
Minimum supported client |
Windows XP [desktop apps only] |
|---|---|
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Minimum supported server |
Windows Server 2003 [desktop apps only] |
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Header |
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Library |
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DLL |
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See also