[jph6t]

I was looking for the same thing … well sort of.

I was looking for a plug-in that would pause Winamp when I manually lock Windows.
Ideally, I also wanted this plug-in to resume playback when I came back and unlocked Windows.
If options existed to pause/resume playback based on a timed screensaver … bonus.

After searching, I found two such plug-ins:

• DoJoe's Screen Lock Detector
  
  
  
• MLC Advanced Auto Pause
  
  

So as you can see from the screenshots, MLC Advanced Auto Pause has more configurable options, but I ended up going with DoJoe's Screen Lock Detector. Advanced Auto Pause pauses playback as soon as one clicks CTRL+ALT+DELETE.
Screen Lock Detector doesn’t pause playback until one clicks the “Lock Computer” button after clicking CTRL+ALT+DELETE. This seems more accurate to me, as one might have another reason for clicking CTRL+ALT+DELETE (like accessing the Task Manager).

I also found the following plug-ins, but didn’t test them myself as it seems they are optimized for use with NT/Win2K
(and NOT XP):

• BitchSoft Auto Pause
• LockPause Plug-in