private void bbtDanhsachk_ItemClick(object sender, ItemClickEventArgs e)
{
Form frm = this.Kiemtratontai(typeof(Kho));
if (frm != null)
{
frm.Activate();
}
else
{
Kho k = new Kho();
k.MdiParent = this;
//dmk.StartPosition = FormStartPosition.CenterParent;
k.WindowState = FormWindowState.Maximized;
k.Show();
}
}