private void btnHaupt_Click(object sender, EventArgs e)
{
Haupt frmHaupt = new Haupt();
frmHaupt.Show();
this.Hide();
}
private void Termin_FormClosing(object sender, FormClosingEventArgs e)
{
if (Program.frmHaupt == null)
{
Haupt frmHaupt = new Haupt();
Program.frmHaupt = frmHaupt;
frmHaupt.Show();
}
}