// 로그인 버튼 클릭, id, pw를 받아와서 서버로 전송
        private void button_login_Click(object sender, EventArgs e)
        {
            PK_C_REQ_ID_PW packet = new PK_C_REQ_ID_PW();

            packet.id_       = textBox_id_.Text;
            packet.password_ = textBox_pw_.Text;
            Program.programState_.sendPacket(packet);
        }
        public void SendLoginPacket(string id, string pw)
        {
            PK_C_REQ_ID_PW packet = new PK_C_REQ_ID_PW();

            packet.id_       = id;
            packet.password_ = pw;
            network_.sendPacket(packet);
        }