How to disable interface keyword on visual C++ Express 2008?

Question

I am compiling a legacy C code here and there is a lot of variables and struct members named "interface", but VC2008 express is complaining about these, do you know how to disable this?

I already changed settings to compile the code only as a C code, but no effect on this.

Answer 1

Problem is that MS #defines interface to struct so that

interface Name {...}

can be used in COM c++ code. (objbase.h:199: #define interface __STRUCT__)

Just #undef interface after including Windows.h ..

Answer 2

Do a

#define interface QQInterface

before your code (eg. in the header file), this way everywhere where the keyword interface is used, the compilers sees "QQInterface", which is not a keyword. If all code includes this define, you will not get compiler or linker errors.

Answer 3

If you are trying to compile reasonably portable C code, it might be worth disabling the Microsoft language extensions (/Za on the command line, Configuration Properties > C/C++ > Language in VS) and see if the code compiles then.