Microsoft KB Archive/160773

= BUG: Derived Group Class Loses Custom Properties =

Article ID: 160773

Article Last Modified on 5/10/2003

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APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition
 * Microsoft Visual FoxPro 3.0b Standard Edition
 * Microsoft Visual FoxPro 5.0 Standard Edition
 * Microsoft Visual FoxPro 5.0a
 * Microsoft Visual FoxPro 6.0 Professional Edition

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This article was previously published under Q160773



SYMPTOMS
When a custom class object is added to a Group type class using the AddObject method, the properties of that custom class object revert to its default values when that derived Group type class is viewed in the Class Designer or dropped on a form.



RESOLUTION
The custom button can be added using the ADD OBJECT clause of the DEFINE CLASS command and will retain its custom property. The bug manifests itself only when adding the custom class with the addobject method.



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



Steps to Reproduce Behavior
  Copy the following code and paste it into a program named Test.prg: ** Code to demonstrate that when a custom class object is  ** added to a Group type class the properties of that ** custom class object revert to the its default values. **  ** The code in this program could also be entered ** through the Command window. **  ** test.prg LOCAL aobj[1], xx  CREATE CLASS optbut AS optionbutton OF test.vcx NOWAIT =ASELOBJ(aobj,1)       && Get an object reference xx = aobj[1] xx.Caption='custom'    && Demonstrate that it's custom KEYBOARD 'Y' CLEAR     && Avoid the dialog box - save class RELEASE WINDOW 'Class Designer'

SET CLASSLIB to test CREATE CLASS optgrp AS optiongroup OF test.vcx NOWAIT =ASELOBJ(aobj,1)       && Get another object reference xx = aobj[1] xx.Height=xx.Height*1.5 && See that you actually ran it  xx.AddObject('opt1','optbut')     && Add custom class object KEYBOARD 'Y' CLEAR RELEASE WINDOW 'Class Designer'

MODIFY CLASS optgrp OF test.vcx NOWAIT

** The caption of the third option button has reverted to the default. ** This problem also occurs with the Command Button group. ** You can examine the Optbut class of Test.vcx with the ** MODIFY CLASS optbut OF Test.vcx to see that it still has ** the customized caption property.  Run that program.

The third option button (default is two buttons) appears in the final OptionButton group but has lost its custom caption and now shows the default caption.

The sequence of commands can be executed in the Command window so that you can more closely observe the process.

Keywords: kbbug kbprogramming KB160773

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