private void btnPhong_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
FrmPhong fPhong = new FrmPhong();
fPhong.MdiParent = this;
fPhong.Show();
}
private void barButtonItem7_ItemClick(object sender, ItemClickEventArgs e)
{
Form frm = Checkform((typeof(FrmPhong)));
if (frm != null)
{
frm.Activate();
}
else
{
FrmPhong frmPhong = new FrmPhong();
frmPhong.MdiParent = this;
frmPhong.Show();
}
}