PHP Code:
 public static bool Send_Private_Message(String Username, String Subject, String Message)
    {
        if (Wrapper.Post(Gaia_URL_Nor + Gaia_URL_NorPrivateMessages + "?mode=post", "username=" + Username + "&subject=" + Subject + "&message=" + Message + "&folder=inbox&selected_options=post&btn_send=true=&mode=post", "http://www.gaiaonline.com/").IndexOf("Your Private Message has been sent to:") > -1)
        {
            return true;
        }
        return false;
    } 
Straight out of the teams Gaiaonline.cs Module.

PHP Code:
Boolean value = Gaiaonline.Send_Private_Message(To, Subject, Message);
                                
                                if (value == true)
                                    Console.WriteLine(Accounts[i] + " : Sent message to " + To);
                                else
                                    Console.WriteLine(Accounts[i] + " : Failed to send message.") 
How to use.