Does any one know how to subclass paltalk room window that holds nick listview ? I be happy if some one show me how that can be done.Thank

This is a good article to get you started... It's written for C++ but it will at least teach you the concepts required.

http://www.codeproject.com/dll/subhook.asp

(Edit: Basically, you can use a windows hook on WH_GETMESSAGE and then use SetWindowLong to set the message proc to your own. You MUST subclass from within the Paltalk process - hence the necessary hook. I dont know much about vb, so I have no idea if a) you can compile shared memory segments, and b) if it's possible to dll inject.)

Good luck

make a function get shared data in your dll that can call by vb6

Method there are lots of examples here showing how to subclass... for example the systemlistview comtrol has been done and you should find it in this catagory