MD5 Resource loading

Hi all,

When I activate MD5 Caching in my native build, I come across some resource loading problems.
I already found this part in the documents (https://docs.cocos2d-x.org/creator/manual/en/publish/publish-native.html#md5-cache), but it is not clear to me where to put the given example code, as I am not familiar with all the engine cpp codes.

Can someone clarify that for me please?

Best regards