Add to snippets.txt snippet like:

================================================================================
// #shortcut
code
$selected$ - selected text before snippet was used
code
$end$ - where to place cursor
================================================================================

(delimiter is 80 chars =)

Run python snippets.py.

It will re-generate (all editors should automatically detect changes):

• for Visual Studio 2019: files *.snippet in folder ~\My Documents\Visual Studio 2019\Code Snippets\Visual C++\My Code Snippets\. See Tools > Code Snippets Manager.
• for VS Code: file cpp.json in folder ~\AppData\Roaming\Code\User\snippets\. See File > Preferences > User Snippets.
• for Sublime: files *.sublime-snippet in folder ~\AppData\Roaming\Sublime Text 3\Packages\User\. See Tools > Snippets.

Paths could be overriden in settings.py file, settings.py-sample included.

Now you can start print #shortcut in IDE and press Tab when menu appears. Snippet name will be expanded to full code.