Help with system() function

[derangedhk417]

I am trying to make a program that helps someone recover a lost password. It works by calling "runas /profile /user:bob" and then entering a password from a wordlist until the program gets the password right. When this command is called the shell prompts for the user to input a password. How do I make the program input the password instead of the user?

[modoran]

Check CreateProcessWithLogonW() or LogonUser() to impersonate another user.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms682431%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa378184%28v=vs.85%29.aspx