TRY this CODE in VB ..
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WebBrowser1.Navigate("http://login.website.co/")
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
WebBrowser1.Document.GetElementById("login").SetAttribute("value", TextBox1.Text)
WebBrowser1.Document.GetElementById("passwd").SetAttribute("value", TextBox2.Text)
WebBrowser1.Document.GetElementById(".save").InvokeMember("click")
End Sub
End Class
(Register from the website and login from the program suitable for online gaming.)
(Or you can put a small webbrowser inside your program and just when you click "Login", it will load and log into your website.)
For the "Login" and "passwd" 6-7 line in the code, you need to edit the HTML code of the website by using a webbrowser like Internet Explorer, Mozzila, Opera, etc. and see if they are the same or not, if not just copy and replace them in the code.
If you have more problems, just contact me on Cassanovazzz@live.com or facebook.com/Bo00oDy.