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## Using environment variables in include directive

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### #1eppo  Members

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Posted 26 November 2012 - 01:18 PM

Hi,

I'm trying to get the pre-Windows 8 XAudio2 headers from the DirectX SDK to work under VS2012.
At one point the documentation tells me to add the following line of code...

#include <%DXSDK_DIR%Include\xaudio2.h>

..., which doesn't work: cannot open include file.

I assume this is because it's not possible to literally specify environment variables this way?

### #2fastcall22  Moderators

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Posted 26 November 2012 - 01:34 PM

At one point the documentation tells me to add the following line of code...

#include <%DXSDK_DIR%Include\xaudio2.h>

Do you have a link to the documentation? I'd like to see some context for this code.

I assume this is because it's not possible to literally specify environment variables this way?

No, it is not possible. What I'm assuming is implied by the code is:
1. Add $(DXSDK_DIR)\Include to the include path of your Microsoft.win32.cpp.user properties sheet. 2. Add$(DXSDK_DIR)\Lib\x86 to the library path of your Microsoft.win32.cpp.user properties sheet.
3. Include <xaudio2.h>
zlib: eJzVVLsSAiEQ6/1qCwoK i7PxA/2S2zMOZljYB1TO ZG7OhUtiduH9egZQCJH9 KcJyo4Wq9t0/RXkKmjx+ cgU4FIMWHhKCU+o/Nx2R LEPgQWLtnfcErbiEl0u4 0UrMghhZewgYcptoEF42 YMj+Z1kg+bVvqxhyo17h nUf+h4b2W4bR4XO01TJ7 qFNzA7jjbxyL71Avh6Tv odnFk4hnxxAf4w6496Kd OgH7/RxC

### #3eppo  Members

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Posted 26 November 2012 - 01:46 PM

Here is the specific page: http://msdn.microsoft.com/en-us/library/windows/desktop/ee663275.aspx

I already have this working, but the thing is: you have to add the complete path to the header files (#include <C:/Program Files (x86)/Microsoft DirectX SDK (June 2010)/Include/xaudio2.h>), otherwise they will conflict with the newer headers from the Windows 8 SDK.

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