.NET i wm_nclbuttonup?

Code:

        protected override void WndProc(ref Message m)
        {
            const int WM_NCLBUTTONUP = 0x00A2;
            if (m.Msg == WM_NCLBUTTONUP)
            {
                // ...
            }
            base.WndProc(ref m);
        }

Code:

protected override void WndProc(ref Message m)
        {
            switch(m.Msg)
            {                    
                case WM_NCLBUTTONUP:
                    this.NcHitTest(m.LParam);
                    break;
                case WM_NCLBUTTONDOWN:
                    //TODO handler za nclbuttondown
                    Debug.WriteLine("DOWN");
                    break;
                case WM_PAINT:
                    RefreshForm();
                    break;
                default:
                    base.WndProc (ref m);
                    break;
            }        
        }