How can we use LookUpControl in my Custom page in CRM 4.0

I'm trying to replicate the functionality of this CRM 4.0 in my custom aspx page

<nobr>
<asp:TextBox ID="lookupresult" runat="server"></asp:TextBox>
<img src="/_imgs/btn_off_lookup.gif" onclick="ShowOwnerLookupDialog()" />

<script language="javascript">
function ShowOwnerLookupDialog()
{
var lookupItems = showModalDialog( '/_controls/lookup/lookupsingle.aspx?class=BasicOwner&objecttypes=8,2020&browse=0&ShowNewButton=1&ShowPropButton=1&DefaultType=0' , null, '' );
document.all.lookupresult.value = lookupItems.items[0].id;
}
</script>
</nobr>