private void button_relay_start_Click(object sender, EventArgs e)
{
Http_call.relay_start(user_index, relay_start_callback);
}
private void button_web_login_Click(object sender, EventArgs e)
{
string address = "http://" + textBox_ip.Text + ":" + int.Parse(textBox_port.Text) + "/";
Http_call.login(address, textBox_user_id.Text, textBox_password.Text, login_callback);
}
