private void laporanPenjualanToolStripMenuItem_Click(object sender, EventArgs e)
{
if (laporan == null)
{
laporan laporan = new laporan();
laporan.MdiParent = this;
laporan.FormClosed += new FormClosedEventHandler(Laporan_FormClosed);
laporan.Show();
}
else
{
laporan.Activate();
}
}
private void Laporan_FormClosed(object sender, FormClosedEventArgs e)
{
laporan = null;
}