private void salestatisticstBttn_Click(object sender, EventArgs e) { if (salesstatisticsform == null) { salesstatisticsform = new salesstatisticsForm(); salesstatisticsform.FormClosed += salesstatisticsform_FormClosed; } salesstatisticsform.Show(this); Hide(); }
void salesstatisticsform_FormClosed(object sender, FormClosedEventArgs e) { salesstatisticsform = null; Show(); }