Custom Report Items in VS2010 or VS2012 ? Does it work

Question

Does anyone know if Custom Report Items actually work in either VS2010 or VS2012.
I have taken the 2008R2 Polygons sample and compiled it using VS2010 and VS2012 and neither actually work in either version.
There are no assembly linking errors, but the compiled dlls either can't be added to the toolbox in VS2012 or can't load the type in VS2010.
I have tried everything and was interested if Microsoft had been able to get it working them selves.
My next step is to write my own, but was wondering if it actually works before I try.
Jamie

Answer 1

Just fixed this myself.
It appears the documentation online is wrong and the sample code is missing a reference to a reporting services dll and an attribute.
What you need to do to get it working in VS2012 is add a reference to: Microsoft.ReportingServices.designer.11.0.dll to the PolygonsDesigner project and then add the following attribute to the PolygonsDesigner class: [ToolboxItem(typeof(Microsoft.ReportDesigner.Shell.CRIToolboxItem))]
I also removed the [System.CLSCompliant(false)] attribute.
You then recompile and place both dlls in C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies directory and the PolygonsDesigner.dll into the C:\Program Files\Microsoft SQL Server\MSRS11.MSSQLSERVER\Reporting Services\ReportServer\bin
or what ever is you reporting services path.
You also need to change the Microsoft example for the rereportserver.config file to:
    <ReportItemDesigner>
   <ReportItem Name="Polygons" Type="Microsoft.Samples.ReportingServices.PolygonsDesigner, PolygonsDesigner" />
    </ReportItemDesigner>
    <ReportItems>
   <ReportItem Name="Polygons" Type="Microsoft.Samples.ReportingServices.PolygonsCRI,PolygonsCRI"/>
    </ReportItems>
 Notice that I changed the namespaces and class to what is in the actual code so if you change it make sure you change it here.
And here in the RSReportDesigner.config:
<ReportItems>
      <ReportItem Name="Polygons" Type="Microsoft.Samples.ReportingServices.PolygonsCustomReportItem,PolygonsCRI" />
    </ReportItems>
    <ReportItemDesigner>
      <ReportItem Name="Polygons" Type="Microsoft.Samples.ReportingServices.PolygonsDesigner, PolygonsDesigner" />
    </ReportItemDesigner>
    <ReportItemConverter>
      <Converter Source="Chart" Target="Polygons" Type="PolygonsCRI.PolygonsConverter, PolygonsDesigner" />
    </ReportItemConverter>
Notice I haven't changed the last part as I didn't know what the PolygonsCRI.PolygonsConverter was.
And make sure the rssrvpolicy.config looks like this:
     <CodeGroup class="UnionCodeGroup" version="1" PermissionSetName="FullTrust" Description="This code group grants PolygonsCRI.dll FullTrust permission. ">
       <IMembershipCondition class="UrlMembershipCondition" version="1" Url="C:\Program Files\Microsoft SQL Server\MSRS10_50.SQLSERVER\Reporting Services\ReportServer\bin\PolygonsCRI.dll" />
    </CodeGroup>
After a restart of ssrs and relaunch of VS2012 I opened a test project and added the PolygonsDesigner.dll to the toolbox and it works.
Jamie