public void Kalender() { if (kalender != null) { kalender.Show(); return; } kalender = new Kalender(this, false); kalender.FormClosing += Kalender_FormClosing; kalender.Show(); }
private void btnUrlaub_Click(object sender, EventArgs e) { if (kalender != null) { kalender.Show(); return; } kalender = new Kalender(verwaltung, true); kalender.FormClosing += Kalender_FormClosing; kalender.Show(); }
private void Kalender_FormClosing(object sender, FormClosingEventArgs e) { kalender = null; }