How can I place listeners on actions or...

I want to add listeners to photoshop actions. For example, if a user use brush to draw a line, how can I get this event and use it to trigger something else? Does any PS SDK doc include this area? Thanks
How can I place listeners on actions or...
I'd say you can not do this - take a look at:

http://www.adobeforums.com/cgi-bin/webx/.3bc43535/0
How can I place listeners on actions or...
thanks for you reply. But is there any means we can retrieve the history with details such as parameters of filter?

Sorry, I can't help you much with that, take a look at the getter-plugin example - it gets some history information, but I'm not sure if it also retrieves any parameters, maybe this will give you some insight.

Thank you for your advice

you can listen for a 'this action just got executed' and you can listen for the 'brush tool just got selected' but you cannot listen to 'brush strokes'.