Compile the handler using any compiler, for example TCC.
tcc -o tool.exe ../handler.c
Run plusplus.reg to register the plusplus: url handler. Modify it with a text editor to change the tool.exe location.
Toss driver.php on a local server. Call it with a file path a the ?op= query parameter.
http://localhost/WorkFileList/driver.php?op=C:\wamp\www\noUiSlider
Click/drag to select files to list. Hit a to accept. Click a file to launch it in Notepad++.