private void barButtonItem36_ItemClick(object sender, ItemClickEventArgs e)
{
opentab = 3;
UserInfo frm = null;
if ((frm = (UserInfo)IsFormAlreadyOpen(typeof(UserInfo))) == null)
{
frm = new UserInfo();
frm.MdiParent = this;
frm.Show();
}
else
{
frm.Select();
}
}