PRB: OnInitialUpdate() May Be Called More Than Once (103982)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Professional Edition
- Microsoft Visual C++, 32-bit Enterprise Edition
- Microsoft Visual C++, 32-bit Learning Edition
This article was previously published under Q103982 SYMPTOMS
The OnInitialUpdate() function of a CView object in a single document
interface (SDI) application may be called more than once. Any
initialization that needs to be done only when the view's window is
created should be done in the OnCreate() message handler instead of in
the OnInitialUpdate() function.
MORE INFORMATION
In an SDI application, a single CView object is created to display a
view of the document. When the user changes the document, the data in
the CDocument is cleared using CDocument::DeleteContents(), and data
for the new document is read into the CDocument object. Then the view
is updated by sending a WM_INITIALUPDATE message to the view's window,
which calls the OnInitialUpdate() function. Therefore, every time the
user changes documents, the OnInitialUpdate() function for the view is
called.
| Modification Type: | Major | Last Reviewed: | 12/2/2003 |
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| Keywords: | kbArchitecture kbDocView kbprb KB103982 |
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