protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
Tchittestinfo hti = new Tchittestinfo(e.X, e.Y);
HotTabIndex = SendMessage(Handle, TcmHittest, IntPtr.Zero, ref hti);
if (e.Button != MouseButtons.Left)
{
return;
}
Rectangle r = new Rectangle(_dragStartPosition, Size.Empty);
r.Inflate(SystemInformation.DragSize);
TabPage tp = HoverTab();
if (tp != null && !r.Contains(e.X, e.Y))
{
DoDragDrop(tp, DragDropEffects.All);
}
_dragStartPosition = Point.Empty;
}
private static extern int SendMessage(IntPtr hwnd, int msg, IntPtr wParam, ref Tchittestinfo lParam);