>Yes to both questions
>
>>>This works as expected
>>>
>>>DEFINE CLASS ywmp AS form
>>>
>>>
>>>When I try to do the following
>>>
>>>DEFINE CLASS ywmp AS ultx_AutoCenteredTopForm OF ultxbase
>>>
>>>I receive a compilation error telling me "Unable to find Program ultxbase"
>>>
>>>How should I do it?
>>
>>Do you have a classlib (vcx) called ultxbase.vcx?
>>And does it contain a form class called ultx_AutoCenteredTopForm?

You write that it's a compilation error, is the vcx included in the project?