Change password

Question

I have a procedure that I can call and allow the user to change the password.  The problem is that I am not calling it correctly and its telling me that the method or operation is not implemented. 

Stored Procedure:
public void ChangePassword(string userId, string strOldPassword, string strNewPassword)

{

         //Process

}

 

My Application:

 

 

                bool returnValue = user.ChangePassword();
                if (returnValue == true)
                {
                         //do something here
                }

 

The process returns a bool, which is why I though I could set its value as true in the if statement. I am trying to pull off the local userID and passwords and not change the default ID and password. 

 

Thanks!