Microsoft KB Archive/138523

= PRB: MDI Child Form Drawn Incorrectly with Missing Title Bar =

Article ID: 138523

Article Last Modified on 12/9/2003

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APPLIES TO


 * Microsoft Visual Basic 3.0 Professional Edition
 * Microsoft Visual Basic 4.0 Standard Edition
 * Microsoft Visual Basic 3.0 Professional Edition
 * Microsoft Visual Basic 4.0 Professional Edition
 * Microsoft Visual Basic 4.0 Enterprise Edition

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This article was previously published under Q138523



SYMPTOMS
If an MDI child form is maximized by setting the Windowstate property in the Load event of the MDI parent form, then the child form may be drawn incorrectly when first shown.



WORKAROUND
Resize the MDI parent form. Then the child form is drawn correctly with the Title Bar, Control Box and Restore button.

Or set the height and width of the child form to the ScaleHeight and the ScaleWidth of the MDI parent instead of using 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 the MDIForm_Load procedure with this code to ensure that the child form is painted correctly.



STATUS
Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available.



Steps to Reproduce Behavior
 Create a new project. Form1 is created by default. Add an MDI parent form by clicking MDI Form on the Insert menu in Visual Basic version 4.0 or by clicking New MDI Form on the File menu in Visual Basic version 3.0. Set the MDIChild property of Form1 to True.  In the Load event of the MDI parent form, place the following 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. The child form appears to be drawn (painted) incorrectly. Refreshing the child form after it is maximized does correct the behavior.</ol>

Additional query words: 4.00 3.00 MDI vb4win vb4all

Keywords: kbprb kbcode KB138523

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