Fokus on C# Dialog

Hello,

I have a c# addon dialog. I like to have an event, if the dialog changes to active (dialog has blue title), or if the mouse is doing something else inside the MicroStation and the dialog changes to deactive (dialog has grey title).

The frame-class is inherited from Bentley.MicroStation.WinForms.Adapter.
But none of these events (Focus deactivate, Focus activate, Focus enter, Focus leave, Mouse enter, mouse leave) show up, if the were defined for the frame itself. The work fine on items

Any idea?

Thanks a lot

Volker