private void barButtonItem_LDTruocGiao_ItemClick(object sender, ItemClickEventArgs e)
{
if (formNguonGocDat == null)
{
formNguonGocDat = new F_Main_NguonGocDat();
formNguonGocDat.MdiParent = this;
formNguonGocDat.FormClosed += new FormClosedEventHandler(formNguonGocDat_FormClosed);
formNguonGocDat.Show();
}
else
{
formNguonGocDat.Activate();
}
}
void formNguonGocDat_FormClosed(object sender, FormClosedEventArgs e)
{
formNguonGocDat = null;
}
