Changing SQL 2012 Enterprise Evaluation into SQL 2012 Standard with Volume License

"Upgrading from Evaluation Enterprise (a free edition) to any of the paid editions is supported for stand-alone installations, but is not supported for clustered installations."

Is it also possible to use a Volume License Key when changing to SQL Server 2012 Standard?

Is there a HowTo on the Microsoft Website?

Thanks for your Support.

Chris