For WPF
First add AxInterop.ShockwaveFlashObjects.dll
then paste code
private void Window_Loaded(object sender, RoutedEventArgs e)
{
AxShockwaveFlashObjects.AxShockwaveFlash axShockwaveFlash1 = new AxShockwaveFlashObjects.AxShockwaveFlash();
axShockwaveFlash1.Location = new System.Drawing.Point(0, 0);
this.Controls.Add(axShockwaveFlash1);
axShockwaveFlash1.Movie = @"\clock.swf";
}