Quote Originally Posted by m110033
But,I don't how to use packet about yahoo.
I had seen the http://www.pscode.com.
And I had seen all the things about yahoo,but I do don't know how to modify it.
Can give me ways to learn well?
Learn how to use the Winsock control first. Do a search for "Winsock tutorial" on here or on www.pscode.com/vb

Then maybe make a couple simple chat programs until you learn how it works.

Making a Yahoo! client isn't easy anymore. A lot of things have changed. You can get some info and links to other sites here:
http://en.wikipedia.org/wiki/Yahoo!_Messenger_Protocol

But I wouldn't even bother trying until you can use the Winsock control.