/// <summary>
/// Raises the WndProcHitTest event.
/// </summary>
/// <param name="e">A ViewControlHitTestArgs containing the event data.</param>
protected virtual void OnWndProcHitTest(ViewControlHitTestArgs e)
{
if (WndProcHitTest != null)
{
WndProcHitTest(this, e);
}
}
/// <summary>
/// Process Windows-based messages.
/// </summary>
/// <param name="m">A Windows-based message.</param>
protected override void WndProc(ref Message m)
{
// Only interested in intercepting the hit testing
if (m.Msg == PI.WM_NCHITTEST)
{
// Extract the screen point for the hit test
Point screenPoint = new Point((int)m.LParam.ToInt64());
// Generate event so message can be processed
ViewControlHitTestArgs args = new ViewControlHitTestArgs(PointToClient(screenPoint));
OnWndProcHitTest(args);
if (!args.Cancel)
{
m.Result = args.Result;
return;
}
}
base.WndProc(ref m);
}