Microsoft KB Archive/136529

= BUG: MDI Child Form Is Drawn Without Title in Certain Cases =

Article ID: 136529

Article Last Modified on 12/9/2003

-

APPLIES TO


 * Microsoft Visual Basic 4.0 16-bit Enterprise Edition
 * Microsoft Visual Basic 4.0 32-Bit Enterprise Edition
 * Microsoft Visual Basic 3.0 Professional Edition
 * Microsoft Visual Basic 3.0 Professional Edition

-



This article was previously published under Q136529



SYMPTOMS
An MDI child form is drawn incorrectly at first when it is maximized in the Load event procedure of the MDI parent form by setting the child form's Windowstate property when the child form's height and width dimensions match those of the parent form. When drawn, the child form is missing the Title bar, Control box, and Restore button.



WORKAROUND
If the MDI parent form is resized, the child form is drawn correctly with its Title bar, Control box, and Restore button.

The form is also drawn correctly if the height and width of the child form is set to the ScaleHeight and the ScaleWidth of the MDI parent instead of numerical values. For example, the following code sizes the child to the same dimensions as the MDI parent form, and then maximizes the form: MDIForm1.Width = 6000 MDIForm1.Height = 3000 Form1.Width = MDIForm1.ScaleWidth Form1.Height = MDIForm1.ScaleHeight Form1.WindowState = 2  'Maximize the child window Replace the code in step 4 of the "Steps to Reproduce Problem" section of this article with this code to see that the child form is painted correctly when the example is run.



STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



Steps to Reproduce Problem
 On the File menu, click New Project. Form1 is created by default. Add a MDI parent form. In version 4.0, click MDI Form on the Insert menu. In version 3.0, click New MDI Form on the File menu. Set the MDIChild property of Form1 to True.  In the Load event of an MDI parent form, place this code: MDIForm1.Width = 6000 MDIForm1.Height = 3000 Form1.Width = 6000 Form1.Height = 3000 Form1.WindowState = 2  'Maximize the child window  Run the code by pressing the F5 key.</ol>

Observe that the child form has been incorrectly painted. Refreshing the child form after it is maximized does not result in the child form being correctly painted.

Additional query words: 3.00 4.00 buglist3.00 buglist4.00 vb4win vb4all

Keywords: kbbug KB136529

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.