Compile with theme support

I see in that in the source have a ENABLE_THEME switch to enable theme.
I try
#define ENABLE_THEME 1
in SumatraPDF.cpp but build fail.
Do it is possible to compile SumatraPDF with theme support?

The theme support is not finished. Even if you fix the compilation issues it won’t be complete.

What is the problem with theme support?
II stayed at 3.2.10638 because I consider a dark mode necessary, and I have never had any kind of problem.
If possible i try to compile with theme support.

Theming was started by someone but that someone didn’t finish it. That’s all there is to it. It’s not finished and no-one is working on finishing it.