Is there anyone at all here who has successfully compiled and deployed an SSRS custom report item in VS2012?

Question

Is there anyone at all here who has successfully compiled and deployed an SSRS custom report item in VS2012?  Is there a demo out there that actually works in VS2012?  Is there anyone who has actually been able to compile and deploy that
apparently obsolete Polygons demo?  (Pardon my impatience but I'm running a bit short of time here.)
After much hacking and googling I was able to get Polygons to compile but I still can't deploy it to the toolbox.  ('The custom report item type PolygonsDesigner is not installed').   I've modified the RSReportDesigner.config
as instructed but I have no rssrvpolicy.config file on my local machine and
as yet I have no idea if that is necessary for local development.
In order to get it to compile I first added the reference  C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies\Microsoft.ReportingServices.ProcessingCore.dll to both projects.
To the PolygonsDesigner Project I also added the references:
C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies\Microsoft.ReportDesigner.Controls.dll
C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\PrivateAssemblies\Microsoft.ReportingServices.Designer.11.0.dll
C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\Microsoft.ReportingServices.Interfaces.dll
Are these the correct references?  
Exactly what software do you need installed on your local machine in addition to VS2012 in order to create a custom control?
(Designer.11.0 was added per the instructions in reference: https://connect.microsoft.com/VisualStudio/feedback/details/783391/unable-to-integrate-previously-working-ssrs-custom-report-item-to-vs-2012s-toolbox  
After that I added the alias RSDesigner to it's properties and   extern alias RSDesigner; at the top of the PolygonsDesigner.cs file. )
As of now, the top of the PolygonsDesigner.cs is as follows.  I don't recall making any other changes to the code.  As far as I can remember this is all I did in order to be able to compile the code in VS2012.
    extern alias RSDesigner;
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Collections;
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.Drawing;
    using System.Windows.Forms;
    using Microsoft.ReportDesigner;
    using Microsoft.ReportDesigner.Design;
    using Microsoft.ReportingServices.Interfaces;
    using Microsoft.ReportingServices.RdlObjectModel;
    using System.Xml;
    using System.Xml.Xsl;
    using System.Xml.XPath;
    [LocalizedName("Polygons")]
    [Editor(typeof(CustomEditor), typeof(ComponentEditor))]
    [ToolboxBitmap(typeof(PolygonsDesigner), "Polygons.ico")]      
    [CustomReportItem("Polygons")]
    [ToolboxItem(typeof(RSDesigner::Microsoft.ReportDesigner.Shell.CRIToolboxItem))] 
    [System.CLSCompliant(false)]
    public class PolygonsDesigner : CustomReportItemDesigner
    {   etc...

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