Minimize to tray with single click on tray icon

The subject practically says everything. I always have the WinAmp agent running in the tray and I don't show WinAmp either as an "extra" icon in the tray or in the taskbar.

I simply click the WinAmp agent tray icon whenever I need to do "something" in WinAmp and then I usually minimize it to the tray again by clicking the minimize icon from the titlebar, but it would be nice to be able to minimize it to the tray again by simply clicking the tray icon once more ... for those times when you just need to check "something"

[Neorth]

I think this plugin by DrO is exactly what you're looking for:
http://nunzioweb.com/daz/one_click.html