private void OnTabControlMouseMove(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
if (_movedPage != null && _point != Point.Empty && (Math.Abs(e.X - _point.X) > SystemInformation.DragSize.Width || (Math.Abs(e.Y - _point.Y) > SystemInformation.DragSize.Height)))
{
_tabControl.DoDragDrop(sender, DragDropEffects.Move);
}
}
