In 'projectX', an excel projectX file (.xlsm) creates specific visio projectX files (.vsd/.vsdm) through vba automation (under Windows-7).
The excel and visio projectX files are therefore distinctive from all other excel and visio files on my PC. I want to give them distinctive and filterable file extensions and distinctive file icons.
I use VBA, and IcoFX to customise .ico icons for Excel ribbonX buttons. I have no experience in changing the window's 7 registry settings, though am willing to follow simple instructions.
I see that a utility: File Types Manager from NirSoft, enables me the do this without changing the Window's 7 registry.
What method would you recommend; are there 'gotchas' I need to know about?