2of1/d2d1headers — pull request #4 by wang-bin (2013-03-31 04:02:36+00:00)
Title: some toolchains need _COM_interface defination

this mingw64 toolchain:http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/rubenvb/gcc-4.8-release/

That toolchain has included direct2d and directx 11 files, we may compare with it.