public void EndUpdate()
{
NativeMethodsProxy.SendMessage(this.Handle, NativeMethodsProxy.WM_SETREDRAW, new IntPtr(1), IntPtr.Zero);
Parent.Invalidate(true);
}
public void BeginUpdate()
{
NativeMethodsProxy.SendMessage(this.Handle, NativeMethodsProxy.WM_SETREDRAW, IntPtr.Zero, IntPtr.Zero);
}