DOC: CWnd::LockWindowUpdate Does Not Unlock the Window (142445)
The information in this article applies to:
- Microsoft Visual C++ 1.0
- Microsoft Visual C++ 1.5
- Microsoft Visual C++ 1.51
- Microsoft Visual C++ 1.52
- Microsoft Visual C++ 2.0
- Microsoft Visual C++ 2.1
- Microsoft Visual C++ 2.2
- Microsoft Visual C++ 4.0
- Microsoft Foundation Classes (MFC)
This article was previously published under Q142445 SUMMARY
The documentation for CWnd::LockWindowUpdate() states this function will
disable or reenable drawing for the CWnd object. In the remarks section,
the sentence "Disables or reenables drawing in the given window" is
incorrect. Starting with Visual C++ version 2.0, you should use
CWnd::UnlockWindowUpdate() to reenable drawing to a window locked with
CWnd::LockWindowUpdate().
The documentation error was corrected in Visual C++ 4.1.
MORE INFORMATION
CWnd::LockWindowUpdate() takes no parameters and is implemented as an
in-line call to the Windows function ::LockWindowUpdate(). The function
::LockWindowUpdate() is called with the this->m_hWnd parameter which causes
the window to be locked. To re-enable drawing, NULL should be passed to
::LockWindowUpdate().
In Visual C++ version 2.0 and later, call CWnd::UnlockWindowUpdate() to
reenable drawing to your window. In earlier versions, call the Windows
::LockWindowUpdate( NULL ).
| Modification Type: | Major | Last Reviewed: | 12/2/2003 |
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| Keywords: | kbBug kbdocerr kbdocfix kbfix KbUIDesign kbVC410fix KB142445 |
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