private void Tabs_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if ((TabDragPoint != Point.Empty) && ((Math.Abs(e.X - TabDragPoint.X) > SystemInformation.DragSize.Width) || (Math.Abs(e.Y - TabDragPoint.Y) > SystemInformation.DragSize.Height))) { Tabs.DoDragDrop(sender, DragDropEffects.Move); } } }