How would you activate a scrolling window title?

Winamp scrolls its window title. So how would I use the ACTIVATE command with a title that is always changing? Sure, it has "winamp" in the title, but it may be "win" at the end and "amp" at the begining, or "winam" at the end and "p" at the beginning.

is there a way to ACTIVATE by some other window identification?

Is there a way to list the window titles we can ACTIVATE?