Posted in Web Visio .vsl files July 5, 2023 Unfortunately, the answer is “No.” Visual C++ 2005 Express Edition does not support macros and add-ons. You will need one of the commercial editions of either VC++ 2005 or Visual Studio 2005. https://social.msdn.microsoft.com/Forums/en-US/d0c0495d-dfb3-4d06-a588-b45d3fe27245/visio-vsl-files?forum=Vsexpressvc