private void realTimePlottingToolStripMenuItem_Click(object sender, EventArgs e)
{
// this is the part of real time plotting where we try to plot the different previous values ...
//Form5_real_time_plot f5 = new Form5_real_time_plot(this);
//f5.Show();
//form_app_timer f5 = new form_app_timer(this);
//f5.Show();
}