private void map_MouseDown(object sender, MouseEventArgs e) { MouseDownStart = map.FromLocalToLatLng(e.X, e.Y); if (e.Button == MouseButtons.Left && Control.ModifierKeys != Keys.Alt) { isMouseDown = true; isMouseDraging = false; if (CurrentGMapMarkerStartPos != null) { CurrentGMapMarkerIndex = list.FindIndex(c => c.ToString() == CurrentGMapMarkerStartPos.ToString()); } } }