User Name + Password

i am using Visual Basic.NET

i wanna make a program where i click on a button and it automatically takes me to a site and logs in my user name and password.

For Example:
i have 2 Hotmail accounts and every time i log of, i need to re-type my user name and password. I want the program to take me to 'www.hotmail.com', then type in
E-mail Address: [email protected]
and where it says password, i want it to type my password
this doesnt have to be with hotmail.. there are a lot of sites that i use that dont allow cookies, so i keep having to enter my username and password.

thanks