I have several #ifdefs in a C-Project. I noticed that although certain #ifdef are true and code under that is being used in a project, the VSCODE shows them as not being used (Display them lightly).

I want to know if there is a way to make sure the VSCode displays/highlights the correct #ifdef parameter that is used in C-Language.

I have a .cproject file. It’s an .xml file and all the #ifdefs that are used in a project are defined in that.
Can I use that file or there is any other way to do it.