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GetWindowLong
..msdn Add comment W32 Constants Translate this page |
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Retrieves information about the specified window. The function also retrieves the 32-bit (long) value at the specified offset into the extra window memory. |
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| Code examples: |
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| Declaration: |
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LONG GetWindowLong(
HWND hWnd, // handle to window
int nIndex // offset of value to retrieve
);
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| FoxPro declaration: |
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DECLARE INTEGER GetWindowLong IN user32;
INTEGER hWnd, INTEGER nIndex
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| Parameters: |
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hWnd
[in] Handle to the window and, indirectly, the class to which the window belongs.
nIndex
[in] Specifies the zero-based offset to the value to be retrieved.
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| Return value: |
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If the function succeeds, the return value is the requested 32-bit value.
If the function fails, the return value is zero.
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| Usage: |
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#DEFINE GWL_WNDPROC -4
hWinProc = GetWindowLong(_screen.HWND, GWL_WNDPROC)
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| My comment: |
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This function, as well as GetModuleHandle, retrieves a handle to the application instance; but not only.
See also: SetWindowLong |
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| Word Index links for the GetWindowLong : |
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| Created: | 2001-08-21 12:00:00 | | Modified: | 2007-06-11 16:20:53 |
Visited in last 7 days: 222 |
Adding user-defined items to the Control Menu of VFP form (requires VFP9)