private void btnInfo_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Form frm = this.checkExist(typeof(frmShop));
if (frm != null)
{
frm.Activate();
}
else
{
frmShop f = new frmShop();
f.MdiParent = this;
f.Show();
}
}
