FIX: WriteProperties Event Fires Incorrectly

ID: Q223101

The information in this article applies to:

SYMPTOMS

A UserControl in a project always executes the WriteProperties event prior to the Resize event. According to Key UserControl Events in the product documentation at the URL below, the WriteProperties event only executes when the design-time instance of the control is destroyed or when a property value for the control is changed:

http://msdn.microsoft.com/library/devprods/vs6/vb/html/vbconwerenotinkansasanymore.htm


STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3.

For more information about Visual Studio service packs, please see the following articles in the Microsoft Knowledge Base:

Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed


MORE INFORMATION

This section shows you how to create a sample project that demonstrates the bug behavior. The section assumes you are familiar with creating ActiveX controls and adding ActiveX controls to standard projects. If you are not familiar with these tasks, see the REFERENCES section below for more information.

Steps to Reproduce Behavior

  1. Start a new Standard EXE project in Visual Basic. Form1 is created by default.


  2. From the File menu, add an ActiveX Control project to your Standard EXE project. UserControl1 is created by default.


  3. Copy the following code to the Code Window of the UserControl:


    4. 
Option Explicit

Private Sub UserControl_ReadProperties(PropBag As PropertyBag)
   Debug.Print "read Properties"
End Sub

Private Sub UserControl_Resize()
   Debug.Print "resize"
End Sub

Private Sub UserControl_WriteProperties(PropBag As PropertyBag)
   Debug.Print "write Properties"
End Sub
  4. Close all the windows associated with ActiveX Control project. The ActiveX Control appears on the Toolbox.


  5. From the View menu, select Immediate Window.


  6. Add the ActiveX Control to Form1 of the Standard EXE project (this causes the first resize event to fire.)


  7. From the Run menu, select Start, or press the F5 key to run the program.

    The following appears in the Intermediate Window: 
    
resize
write Properties
resize
read Properties
    The expected behavior is for the Resize Event to fire first, followed by the ReadProperties Event. The WriteProperties Event should not fire.



REFERENCES

A similar bug behavior is documented in the following article in the Microsoft Knowledge Base:

Q223131 FIX: Inconsistent LostFocus Event Execution Between Versions

For more information, see the following topics:

  • Programming With Objects in the Online Help or the MSDN Web site at:

    http://msdn.microsoft.com/library/devprods/vs6/vb/html/vbconprogrammingwithobjects.htm


  • Creating ActiveX Components in the Online Help, or the Microsoft Visual Basic 6.0 Component Tools Guide, or the MSDN Web site at:

    http://msdn.microsoft.com/library/devprods/vs6/vb/html/vbconcreatingolecomponents.htm

    • Additional query words: 

    
Keywords          : kbActiveX kbCtrl kbVBp600bug kbGrpVB kbVS600sp3fix 
Version           : WINDOWS:6.0
Platform          : WINDOWS 
Issue type        : kbbug

    Last Reviewed: May 20, 1999