>So now I need a good idea how to invoke it. Normaly this should be "Alt"+"-" but VFP for some reasons does not open the menu (that's why I end up trying to open it via code). "Alt"+"-" otoh will not be traceable via KEYPRESS.

Are you referring to a form w/o titlebar? What do you need the menu for?

If you want to be able to move the form, check http://www.berezniker.com/content/pages/visual-foxpro/move-form-without-titlebar