private void barButtonItem_DMLoaiDat_ItemClick(object sender, ItemClickEventArgs e)
{
if (formDMLoaiDat == null)
{
formDMLoaiDat = new F_Main_DMLoaiDat();
formDMLoaiDat.MdiParent = this;
formDMLoaiDat.FormClosed += new FormClosedEventHandler(formDMLoaiDat_FormClosed);
formDMLoaiDat.Show();
}
else
{
formDMLoaiDat.Activate();
}
}
void formDMLoaiDat_FormClosed(object sender, FormClosedEventArgs e)
{
formDMLoaiDat = null;
}
