If you are asking how to get started, just install Test Studio on a machine which has Visual Studio installed. This will install our Visual Studio plug-in as well. Simply launch Visual Studio and create a new 'Test' project. Check this article
for more information.
The Standalone version and our Visual Studio plug-in are perfectly cross-compatible for editing tests and executing tests. Exporting tests from Test Studio Standalone version to Visual Studio is easy. From Test Studio you need to go to the upper left and click on the gear wheel and click on the Export to Visual Studio option. Check this article
on how to do that.
All this really does is create a .csproj/.vbproj file you can then open in Visual Studio to open the same test project (the same file set on disk). To go back from Visual Studio to the Standalone version, there's really nothing extra you need to do. Simply open the test project (open the folder where the settings.aiis file is found).
All the best,
the Telerik team