Xp windows user managment c++

[nadzzz]

Hi all, I seek to find a way to manage account logins and status in windows XP. I mostly need to retreive the Administrator flag of the current user. i also need to change the windows user to another when neaded. the user will need to enter the username and password to change his user status. I found a lod of code samples in c# c++.net and j# but i must code it in c++. if someone can only give me a path to look to, I would very appreciate thanks in advance.