private void submenu_penjualan_Click(object sender, EventArgs e)
{
if (trx == null)
{
trx = new FormTransaksi();
trx.MdiParent = this;
trx.FormClosed += new FormClosedEventHandler(trnsksi_FormClosed);
trx.Show();
}
else
{
trx.Activate();
}
}
void trnsksi_FormClosed(Object sender, FormClosedEventArgs e)
{
trx = null;
}