blink window and play specific sound when user click outside modal dialog box

    Hi,


    In .net 2.0 on windows, when a user click outside a modal dialog box, the main window flickers and a system sound is played.
    in WEC 2013 there is also a sound that is played
    how can i change that sound? what are the reg keys?


    Can i also let the main window blink?


    kind regards