請問有人知道growl(for window)怎麼使用嗎？

你們好

請問有人知道growl(for window)怎麼使用嗎？
我裝了growl在xp上
但是他一開始沒有辦法抓到application

官方的說法：
「When Growl is first installed, the Applications tab will not contain any applications. Installing Growl does not automatically cause applications to begin sending notifications. Applications must register to send notifications with Growl and once registered, they will appear in the left pane.」

有人知道怎麼使用嗎？