Insert dialog in forms.

Hi everyone
I have a button in form with the following method.
The problem is even I press cancel in dialog it creates a it creates record(row).
can anyone help modify code such that when I press cancel or close dialog it
won't create new record.

void clicked()
{
    Dialog dlg = new Dialog("@SYS312960");
    DialogField dlgID;
    DialogField dlgName;
    DialogField dlgAddress;
    DialogField dlgGender;
    Emp         empLocal;

    dlgID        = dlg.addField(extendedTypestr(CustAccount), "ID Card No");
    dlgName      = dlg.addField(extendedTypestr(Name), "Employee Name");
    dlgAddress   = dlg.addField(extendedTypeStr(AddressCity), "Address");
    dlgGender    = dlg.addField(extendedTypeStr(GenderEnum), "Gender");
    dlg.run();

    empLocal.IdentityCardCode = dlgID.value();
    empLocal.Name = dlgName.value();
    empLocal.Address = dlgAddress.value();
    empLocal.Gender = dlgGender.value();
    empLocal.insert();

    super();
}