thanks for the response, i figured it was something inherent with how the control draws itself and there wouldnt be a simple solution
there are other reasons why i want it to be a custom action and not simply a standalone app that launches VBPro afterwards... so ill just leave it using a FileBrowse dialog and stripping the filename part off. It's not that big a deal really.... i suppose i more wanted to know why this was the case and only fix it if it could be done easily.
and i can always write my own folderbrowse dialog control if i get really keen!