any one can tell me how to retrieve the open paltalk rooms window title in vb 2008

you have to use enumwindow with a delegate and callback to loop through all top windows. in the callback function, you would check the window class and if it is the correct class, then you get the window caption (text) for the open room name.

In this source by Autopilot, there is a good example of getting room name. It will add the name of all open rooms to a combo box.

edit/ The source in the link above doesn't work with pal 9.9, but the get room name and other functions work just the same. Adapt it to your needs.