protected override void WndProc (ref Message m)
{
const int WM_NCLBUTTONDOWN = 161;
const int WM_SYSCOMMAND = 274;
const int HTCAPTION = 2;
const int SC_MOVE = 61456;
if ((m.Msg == WM_SYSCOMMAND) && (m.WParam.ToInt32 () == SC_MOVE))
return;
if ((m.Msg == WM_NCLBUTTONDOWN) && (m.WParam.ToInt32 () == HTCAPTION))
return;
base.WndProc (ref m);
}