private void submenu_pelanggan_Click(object sender, EventArgs e) { if (plgn == null) { plgn = new FormPelanggan(); plgn.MdiParent = this; //panggil void form close plgn.FormClosed += new FormClosedEventHandler(plgn_FormClosed); plgn.Show(); } else { plgn.Activate(); } }
void plgn_FormClosed(Object sender, FormClosedEventArgs e) { plgn = null; }