1) If you make sure the "Remain Hilited" check is checked, the palette
button will be activated on a mouseDown. This does mean we have to do
some additional work to make sure that the button hilite is set to
false later, but you will see this in just a second.
2) Create a one-line script, in the button, that will repeat through
the fast-forward (or whatever) XCMD. The line should look something
like this:
do("repeat until the mouse is up" & return & "beep" & return & "end repeat"┬
& return & "set hilitedButton of window bob to 0")
This script uses a beep instead of a fast forward, but replacing the two
would create the desired results.
This article is adapted from the Claris Tech Info database.