PRB: "This operation not supported for Class Member Object"

• Microsoft Visual FoxPro for Windows, version 3.0

SYMPTOMS

When the CLONEOBJECT() method is used to duplicate a member of a class, the error "This operation not supported for Class Member Object" is displayed.

CAUSE

The object is a contained member of an instance of a visual class stored in a class library (.VCX file). Visual FoxPro does not support cloning of contained member objects. The CLONEOBJECT() method is designed to copy information that is contained at the object level.

WORKAROUND

If, when designing a wizard or a builder, you plan on duplicating a control at form design time, define a class for this specific control and place an instance of this class on the form.

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce Behavior

1. Create a form.

2. Select the View Class button from the Form Controls toolbar. Select Add, and add the Buttons VCX located in the SAMPLES\CONTROLS directory.

3. Select the VCR control, and place it on the form. Select the CmdTop button in the Object dropdown.

4. In the Command window, type:

   a. =ASELOBJ(acmdTop)

          *Places information about the selected control in the acmdtop array
   

   b. acmdTop(1).Cloneobject('cmdtop2') && Generates an error