Hello Al.

I can't see where the iDemoEvents interface is defined.

This is just how COM works < s >. When the OLEPUBLIC class is built into a dll, VFP automatically prefixes the class name with the letter “I” and uses it as the name for the Interface in the COM server. As a matter of fact, the COM server that gets built also automatically inherits the two basic COM interfaces (IDispatch and its parent IUnknown).