private void chasnge_pin_Click(object sender, EventArgs e)
{
if (pin1_box.Text != null || pin2_box.Text != null)
{
mf.set_pins(pin1_box.Text, pin2_box.Text);
}
else
{
MessageBox.Show("Put all pins", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
