Microsoft KB Archive/171513

= FIX: Cannot Drag a Nested UserControl with Automatic DragMode =

Article ID: 171513

Article Last Modified on 11/18/2003

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APPLIES TO


 * Microsoft Visual Basic 5.0 Learning Edition
 * Microsoft Visual Basic 5.0 Professional Edition
 * Microsoft Visual Basic 5.0 Enterprise Edition

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This article was previously published under Q171513



SYMPTOMS
When you have a nested UserControl whose DragMode is set to Automatic and you attempt to drag the control at run-time, your application may quit unexpectedly or you may receive the following error:

"Run-time error '-2147417848 (80010108)':

Method 'DragMode' of object '_UserControl1' Failed"



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

170365 : INFO: Visual Studio 97 Service Packs - What, Where, and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

171554 : INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 2



Steps to Reproduce Behavior
 Start a new "Standard EXE" project. Add a UserControl to the project. Set the Backcolor property of the UserControl to &H000000FF& (red) and the Name property to "usrMovable." Resize usrMovable so that it is fairly small.  Add the following code to the Click event of the UserControl: UserControl.Extender.DragMode = vbAutomatic

 Add another UserControl to the project and set its Name property to "usrHolder."</li> Add an instance of usrMovable to usrHolder.</li> Add an instance of usrHolder to Form1.</li> Run the project.</li> Click usrMovable and then attempt to drag usrMovable. You will either receive the error described at the beginning of this article or your Visual Basic application will unexpectedly end.</li></ol>

Keywords: kbbug kbfix kbvbp500sp2fix kbvs97sp2fix KB171513

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