void _client_MouseClick(object sender, MouseEventArgs e)
{
var handle = NativeMethods.ChildWindowFromPoint(_client.Handle, e.Location);
if (handle == IntPtr.Zero || handle == _client.Handle)
return;
// Find the child that was clicked.
System.Windows.Forms.Form clickedForm = null;
foreach (var form in Parent.MdiChildren)
{
if (form.Handle == handle)
{
clickedForm = form;
break;
}
}
if (clickedForm == null)
return;
// Activate the correct form.
var topForm = FindTopForm(clickedForm);
if (topForm.ContainsFocus)
{
StopFlashing();
var info = new NativeMethods.FLASHWINFO();
info.cbSize = (uint)Marshal.SizeOf(info);
info.hWnd = topForm.Handle;
info.dwFlags = NativeMethods.FLASHW_TIMER | NativeMethods.FLASHW_ALL;
NativeMethods.FlashWindowEx(ref info);
_flashingForm = topForm;
_flashTimer.Start();
}
else
{
topForm.Focus();
}
}
private void StopFlashing()
{
_flashTimer.Stop();
if (_flashingForm != null)
{
var info = new NativeMethods.FLASHWINFO();
info.cbSize = (uint)Marshal.SizeOf(info);
info.hWnd = _flashingForm.Handle;
info.dwFlags = NativeMethods.FLASHW_STOP;
NativeMethods.FlashWindowEx(ref info);
if (_flashingForm.ContainsFocus)
{
NativeMethods.SetWindowPos(
_flashingForm.Handle,
IntPtr.Zero,
0, 0, 0, 0,
NativeMethods.SWP_NOSIZE | NativeMethods.SWP_NOMOVE |
NativeMethods.SWP_NOZORDER | NativeMethods.SWP_FRAMECHANGED
);
}
_flashingForm = null;
}
}
