Double-Click event in Find Results window

Hi,

I have implemented a LanguageService using MPF. If someone uses, e.g., the default "Find in Files" feature to search for some string, Visual Studio's "Find Results" Toolwindow comes up showing the respective search results. Usually, double-clicking one of the result-entries opens the respective location in the text-editor. However, in my case nothing happens at all. Is there any event or command or method (inside MPF?) that I need to implement/override in order to act on a double-click in the Find Results window?

Regards,
Max