dokan (https://en.wikipedia.org/wiki/Dokan_Library) has an example application called "mirror" which you could possibly use.

https://github.com/dokan-dev/dokany/wiki/Use-Mirror-example

It has a flag "/w" which allows to mount a directory as read-only.

Dokan has an example application called "mirror" which you could possibly use.

It has a flag, "/w", which allows to mount a directory as read-only.