The e.X and e.Y coordinates are probably local. Convert them to screen coordinates before showing the context menu: Point localPoint = new Point(e.X, e.Y); Point screenPoint = dataGridView.PointToScreen(localPoint); myContextMenu.Show(screenPoint...); Tech, life, family, faith: Give me a visit. I'm currently blogging about: Roman Catholic Relevance? The apostle Paul, modernly speaking: Epistles of Paul Judah Himango

Try: Grid.MultiSelect = false; // surely clear all selections Grid.MultiSelect = true; // return Grid state back

the "SelectedIndex" does not exist in this case.

oh, thanks a lot man

right you are! :-O Ian

then have a look at MSDN

is it possible the dll read the app.config file of the application?