protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x7b: //WM_CONTEXTMENU
{
int lp = m.LParam.ToInt32();
Point pt = new Point(((lp << 16) >> 16), lp >> 16);
IntPtr hHdr = HeaderHandle;
if (0 != NativeMethods.MapWindowPoints(IntPtr.Zero, hHdr, ref pt, 1))
{
var hti = new NativeMethods.HDHITTESTINFO(pt);
int item = NativeMethods.SendMessage(hHdr, NativeMethods.HeaderMessage.HitTest, 0, hti).ToInt32();
if (item != -1)
{
if (ColumnContextMenuStrip != null)
{
ColumnContextMenuStrip.Show(pt);
}
}
}
}
break;
case 0x204E: // WM_NOTIFY
WmReflectNotify(ref m);
break;
case 0x0200: // WM_MOUSEMOVE
return;
case 0x0202: // WM_LBUTTONUP
default:
break;
}
base.WndProc(ref m);
}