Open local app from hyperlink

December 17, 2020 

Adding a custom URI in Windows involves adding a registry entry within HKEY_CLASSES_ROOT . The following will open the app with the absolute path given when clicking on a link to css-tricks://<text> . 

Windows Registry Editor Version 5.00 
[HKEY_CLASSES_ROOT\css-tricks] 
"URL Protocol"="" 
@="CSS Tricks (Application name)" 
[HKEY_CLASSES_ROOT\css-tricks\shell] 
[HKEY_CLASSES_ROOT\css-tricks\shell\open] 
[HKEY_CLASSES_ROOT\css-tricks\shell\open\command] 
@=""C:\\Windows\\notepad.exe" "%1"" 

From < https://css-tricks.com/hyperlinking-beyond-the-web/#windows-traditional >