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Editorial Team
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Asked: 2026-06-09T11:40:14+00:00

I’m going absolutely nuts here. I’m doing some C++ development on Windows and I

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I’m going absolutely nuts here. I’m doing some C++ development on Windows and I have a namespace named ‘interface’:

namespace gd {
namespace interface {

}} // end namespace

However, there is a file named “objbase.h” that gets included no matter if I include “Windows.h” or “Wtypes.h”, which contains a macro named ‘interface’. This macro won’t allow me to use the namespace name. Is there a feature in the Win32 API to disable the definition of the interface macro? If not, can someone think of a clever workaround to disabling it, without requiring too many mass changes in my code base?

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1 Answer

  1. Editorial Team

    If you really want to do this, you could #undef the interface macro.

    I’d suggest, rather, not naming your namespace interface, since interface is as close to being a reserved word as you can get without actually being a reserved word. It’s going to cause a great deal of confusion to have that namespace in use.

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