BUG: Setting OptionButton Value to True Sets TabStop to True

• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, versions 5.0, 6.0

SYMPTOMS

Setting the Value property of an OptionButton equal to True, either by setting it through code or clicking the radio button, the TabStop property is also set to True.

STATUS

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

MORE INFORMATION

Steps to Reproduce Behavior

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



2. Add a CommandButton and an OptionButton to Form1.



3. Add the following code to the form module:

   
         Sub Form_Load()
            Option1.TabStop = False
         End Sub
   
         Sub Form_Click()
            Option1.Value = True
            Debug.Print Option1.TabStop
         End Sub
    




4. Save the project and run it.



5. Press the TAB key and note that you cannot tab between controls.



6. Now click on the Form, which will set the Value property of the OptionButton equal to True. The same behavior will occur if the OptionButton is clicked with the mouse.



7. Press the TAB key again. Note this time that you are able to tab to the OptionButton. This occurs because setting the Value property to True sets the TabStop property to True.



8. To work around this bug, reset the TabStop property equal to False after the Value property is set to True. In design-mode, modify the Form Click event to look similar to the following:

   
         Sub Form_Click()
            Option1.Value = True
            Option1.TabStop = False
            Debug.Print Option1.TabStop
         End Sub
    




9. Repeat steps 4-7, and note that the OptionButton is never in the tabbing sequence.

REFERENCES

For additional information, please see the following article in the Microsoft Knowledge Base:

Q191720 : BUG: Option Button Value Changes When Group is Disabled

Additional query words: kbDSupport kbDSD kbVBp kbCtrl kbVBp600bug kbVBp500bug

Keywords : kbGrpVB
Version : WINDOWS:5.0,6.0
Platform : WINDOWS
Issue type : kbbug