GDI+ library causes “error C2760: syntax error: unexpected token 'identifier', expected 'type specifier'” in VS2017 when compiled for XP

Question

I\'m trying to include the following definitions for GDI+ into my Win32 C++ project that is compiled under Visual Studio 2017:

#include 
#include         


        

Answer 1

Add this line before the very first(!) #include of COM-related header to fix objbase.h(239): error C2760: syntax error: unexpected token 'identifier', expected 'type specifier' :

typedef struct IUnknown IUnknown;

This fix works, because the line in objbase.h(239) mentioned in the error contains static_cast(*pp); despite that IUnknown still haven't been declared in that place.