Hi I am creating a custom filter to do filters in products, where i am linking mu webcontrol as new webpart and adding the properties link where condition etc, to access the property names i need to use CMSAbstractWebPart and to send the filter condition to the filter.ascx i need to use CMSAbstractDataFilterControl, i was not able to inherent both of the base classes, can you specify any other way to use the 2 base classes, thanks.