private void kelolaPelangganToolStripMenuItem_Click(object sender, EventArgs e) { if (dataPelanggan == null) { DataPelanggan dataPelanggan = new DataPelanggan(); dataPelanggan.MdiParent = this.MdiParent; dataPelanggan.FormClosed += new FormClosedEventHandler(DataPelanggan_FormClosed); dataPelanggan.Show(); } else { dataPelanggan.Activate(); } }
private void DataPelanggan_FormClosed(object sender, FormClosedEventArgs e) { dataPelanggan = null; }