What is the use of AMS.Profile.dll file for making a database connection.

[muthu1802]

I use the following code..the code runs properly..but i can't understand the code.can any one explain me.

using System;
using System.Data.SqlClient;
using System.Data;
using SQL_Tuner;
using AMS.Profile;

namespace SQL_Tuner
{
    public class DataBase
    {
        clsGlobal C1= new clsGlobal();          
        public DataTable GetDatabases()
        {
            DataTable dt = null;
            if (dt == null)
            {
                clsGlobal.sServer = clsGlobal.sgBOSetup.GetValue("CONNECTION", "SERVER").ToString();
                clsGlobal.sUsername = clsGlobal.sgBOSetup.GetValue("CONNECTION", "USERNAME").ToString();
                clsGlobal.sPassword = clsGlobal.sgBOSetup.GetValue("CONNECTION", "PASSWORD").ToString();
                clsGlobal.sDatabase = clsGlobal.sgBOSetup.GetValue("CONNECTION", "DATABASE").ToString();

                SqlDBHandler db = new SqlDBHandler(clsGlobal.sServer, clsGlobal.sDatabase, clsGlobal.sUsername, clsGlobal.sPassword);
                try
                {
                    dt = db.ExecDT ("sp_helpdb");
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }
            return dt;

        }
    }
}