Shape.ClassID Property (Visio)
Returns the class ID string of a shape that represents an ActiveX control or an embedded or linked OLE object. Read-only.
The ClassID property raises an exception if the shape doesn't represent an ActiveX control or an OLE 2.0 embedded or linked object. A shape represents an ActiveX control or an OLE 2.0 embedded or linked object if the visTypeIsOLE2 bit (&H8000) is set in the value returned by Shape.ForeignType.
ClassID returns a string of the form:
This identifies the application that services the object. It might, for example, identify an embedded object on a Microsoft Visio page as a Microsoft Excel object.
After using a shape's Object property to obtain an Automation interface on the object the shape represents, you might want to obtain the shape's ClassID or ProgID property to determine the methods and properties provided by the interface.