private void barButtonItem_DmHinhThuc_ItemClick(object sender, ItemClickEventArgs e)
{
if (formDMHinhThucSuDung == null)
{
formDMHinhThucSuDung = new F_Main_DMHinhThucSuDung();
formDMHinhThucSuDung.MdiParent = this;
formDMHinhThucSuDung.FormClosed += new FormClosedEventHandler(formDMHinhThucSuDung_FormClosed);
formDMHinhThucSuDung.Show();
}
else
{
formDMHinhThucSuDung.Activate();
}
}
void formDMHinhThucSuDung_FormClosed(object sender, FormClosedEventArgs e)
{
formDMHinhThucSuDung = null;
}
