http://msmvps.com/blogs/laflour/archive/2008/08/09/deploying-sharepoint-web-parts-as-a-part-of-pagelayouts-in-moss-2007.aspxWeb Parts are an important and everywhere used part of SharePoint. Web Parts are documented pretty good and there are several sources describing as just ASP.NET WebParts ( Darren Neimke book ) and some resources about Web Parts in SharePoint as well.enCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/laflour/archive/2008/08/09/deploying-sharepoint-web-parts-as-a-part-of-pagelayouts-in-moss-2007.aspx#1675945Fri, 06 Mar 2009 09:54:10 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1675945Merijn van Mourik<p>Hi,</p> <p>I did not succeed connecting a MOSS excel webpart to a querystringfilter webpart using this procedure.</p> <p>Best regards,</p> <p>Merijn</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1675945" width="1" height="1">