Beep

Brad Abram's has been posting some
killer design guidelines on his blog which you should check out, and I also noticed
he posted a useful sample with
different message beep types.  Scott Hanselman also included his sample from the
Portland user group.  Below is another easy way to do the PC beep which
requires a reference to the Microsoft.VisualBasic assembly: 


Microsoft.VisualBasic.Interaction.Beep();