If you search the forum for "sockopen", you'll find various examples of how to work with sockets.
Basically, you need to open the socket using /sockopen. Then, you need an on SOCKOPEN event. These usually look the same no matter what site you're working with other than the GET line and the HOST line. Finally, you need the on SOCKREAD event that will parse your text. Remember that text is read 1 line at a time from the HTML code, so you need to check each line for the text you're trying to get and, when you find it, do whatever you want to with it.