mmsystem.h and link error

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09-19-2001
swordfish

mmsystem.h and link error

Hi, i just added

#include <mmsystem.h>

and now i am getting heapssss of link errors?

MainFrm.obj : error LNK2005: _IID_IAudioExternalSynthesizer already defined in in6.obj
MainFrm.obj : error LNK2005: _IID_ITTSExternalSynthesizerA already defined in in6.obj
MainFrm.obj : error LNK2005: _IID_ITTSExternalSynthesizerW already defined in in6.obj
MainFrm.obj : error LNK2005: _CLSID_SynthEngineEnumerator already defined in in6.obj
MainFrm.obj : error LNK2005: _CLSID_SynthEngine already defined in in6.obj
MainFrm.obj : error LNK2005: _CLSID_SynthAudioDest already defined in in6.obj
MainFrm.obj : error LNK2005: _IID_IAudioTel already defined in in6.obj
MainFrm.obj : error LNK2005: _IID_IAudioSourceLog already defined in in6.obj
MainFrm.obj : error LNK2005: _IID_ISTLog already defined in in6.obj

and more?

why is it?
how should i resolve it?
09-19-2001
gliptic

Do you have a source file named in6.cpp?
09-20-2001
swordfish

Yep, and that when errors came, when i inserted that file to current project. There are two file in6.h and in6.cpp, and error comes only in code for playing the sound.
09-20-2001
Xterria

include 'winmm.lib' under 'Project->Settings' for MSVC++
09-20-2001
Esss

Do you have INITGUID defined somewhere? These errors usually occur when you have INITGUID defined in all source files. It should be defined for one only.
09-20-2001
Unregistered

The links errors went away, don't know how, but these come now

new1View.obj : error LNK2001: unresolved external symbol _CLSID_MMAudioDest
new1View.obj : error LNK2001: unresolved external symbol _IID_IAudioMultiMediaDevice
new1View.obj : error LNK2001: unresolved external symbol _CLSID_TTSEnumerator
new1View.obj : error LNK2001: unresolved external symbol _IID_ITTSFindW
Debug/new1.exe : fatal error LNK1120: 4 unresolved externals

don't know why? Ands its only INITGUID.h once.