PRB: Cannot Add Methods to Objects at Design Time

• Microsoft Visual FoxPro for Windows, version 3.0

SYMPTOMS

Selecting the Form, New Property option while a control is highlighted does not add a property to a control. The new property is added to a form.

CAUSE

This is by design. When a form is created with the CREATE FORM or MODIFY FORM commands, a form object is instantiated, and instances of objects are manipulated in design mode. Generally, a property cannot be added to an object once it is instantiated, and to modify a visual class, it is necessary to use the Class Designer. However, a special case has been made to the Form designer, where the form is subclassed to allow the creation of form properties and methods at form design time. This feature is not available for controls.

WORKAROUND

Use the Class Designer to modify the class definition of a control. For more information about using custom objects in a Form, refer to the 'Adding User Defined Objects' paragraph in the Visual FoxPro "Developer's Guide," Chapter 9, "Creating Forms."

STATUS

This behavior is by design.