I use Visual Studio .NET 2003 (VS.NET) for Win32 projects and .NET tinkering.  Unfortunately, my clients are still using Visual Studio 6 (VS6) which uses different project file format from the VS.NET series.  VS.NET will convert VS6 projects into VS.NET projects but not in the opposite direction.  This is a common problem for Windows developers who want to use the latest tools like me.

I use Stephane Rodriguez's open source tool to convert VS.NET projects to to VS6 projects.  It used to work only with VS.NET 2002 projects but the most recent version works with VS.NET 2003 projects as well.  Problem solved.