MapForums

I want to create an addin similar to the included function which shows the geographical position of the mousepointer. Most routines were found and are ready and work, but I can't figure out, how to manage it, that the behavior of the form is the same as the "Extras-Geopositon"-function. Inactiv but on top if it losts focus to the map, invisible if the map losts focus to another application etc. As now it is an own class-form. Had it to be a member of the application-class of Mappoint or ....
Would be very happy if someone knows how to do it, - I'm just still a greenhorn.