After running through the installation of dot42, and specifying both Visual Studio 2010 integration as well as Visual Studio 2012 integration, I'm unable to find a 'dot42' project in 2012. In 2010 the new dot42 subcategory opens under C# and I'm able to see the project types to create.
I noticed that dot42 installs its dlls in the Extensions folder, and looking at the C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\Extensions folder, the dot42 files are there, just as they are under Visual Studio 10.0.
Why can't I create a dot42 project in Visual Studio 2012?
I updated dot42 from version 1.0.0.69 to 1.0.0.70 and the problem has been resolved. I can now create Visual Studio 2012 dot42 projects.