private void penjualanToolStripMenuItem1_Click(object sender, EventArgs e)
{
if (lpJual == null)
{
lpJual = new l_jualan();
lpJual.MdiParent = this;
lpJual.FormClosed += new FormClosedEventHandler(LpJual_FormClosed);
lpJual.Show();
}
else
{
lpJual.Activate();
}
}
private void LpJual_FormClosed(object sender, FormClosedEventArgs e)
{
lpJual = null;
}
