Thanks ~~Bonnie! :)

SendKeys was the part I couldn't find (and it is KeyPress):

if (e.KeyChar == (char)13)
{
   System.Windows.Forms.SendKeys.Send(""+(char)9);
}

>Trap it in either the KeyPress or the KeyDown Event Handler (I can never remember which is which, look it up in Help, but I think you want KeyDown) and then use SendKeys to send a TAB.
>
>~~Bonnie