The Ins and Outs of using buttons in Flash.

The following video tutorial covers the following fives points:

1) FOUR STATES of a button (0:00)
2) Invisible Buttons (5:00)
3) Buttons & Actionscript 2.0 (8:28)
4) Embedding Sound in Buttons (11:49)
5) Embeding Movie Clips in Buttons (15:31)