public String Login(String Username, String Password) {

    String Q = "SELECT * FROM " + DBHelper.TBLname + " WHERE "
            + DBHelper.ColumnUser + " = " + Username
            + " AND " + DBHelper.ColumnPass + " = " + Password;

    Cursor LoginQuery = MyDB.rawQuery(Q, null);

    if (LoginQuery == null) {
        LoginQuery.close();
        String LoginResult = "Wrong User Name and Password";
        return LoginResult;
    }
        LoginQuery.moveToFirst();
        String LoginResult = LoginQuery.getString(3);
        LoginQuery.close();
    return LoginResult;
}