private void BUT_headingholdminus_Click(object sender, EventArgs e)
{
int previous = Convert.ToInt32(TXT_headinghold.Text);
if (!CHK_copter_headingholdlock.Checked)
{
if (previous - 180 < 0)
{
TXT_headinghold.Text = (previous + 180).ToString();
}
else
{
TXT_headinghold.Text = (previous - 180).ToString();
}
}
else
{
if (previous - 1 < 0)
{
TXT_headinghold.Text = (previous + 359).ToString();
}
else
{
TXT_headinghold.Text = (previous - 1).ToString();
}
}
}