Facebook doesn't have a lot of security in the way you login... I made a script in php with curl to login to facebook, it was very easy... But with WinINet idk what is the problem:
I dont get a msg like:
Cookies Required

Cookies are not enabled on your browser. Please adjust this in your security preferences before continuing.

or

You are using an incompatible web browser.

or

Incorrect Email/Password Combination

So i fink I'm not even sending POST data....
I used tamper data to see what is necessary to login to facebook and you only need the pass and the email (there are 4 more hidden fields like char_set passholder etc...)
But i still cant find where is the problem :*(