Determining Project 2007 version using VBA

For those of you on the on SP2 webcast this morning, a question that we hear often around updates come up - how can I check which version of the project client everyone has? Christophe has posted a solution on his blog - https://blogs.msdn.com/chrisfie/archive/2009/04/30/how-to-check-project-2007-version-using-vba.aspx