Microsoft KB Archive/147122

{|
 * width="100%"|

PRB: AUDIOSD Sample Returns E_FAIL from CoCreateInstance

 * }

Q147122

The information in this article applies to:


 * Microsoft Speech Software Development Kit (SDK) version 1.0

SYMPTOMS
When an application attempts to create an instance of the CLSID_MyAudioSource or CLSID_MyAudioDest object contained in the AUDIOSD.DLL, CoCreateInstance returns an HRESULT of E_FAIL.

CAUSE
The DllGetClassObject function in the AUDIOSD sample will always fail because it compares the CLSID passed into CoCreateInstance with CLSID_MMAudioSource and CLSID_MMAudioDest rather than the correct CLSID_MyAudioSource and CLSID_MyAudioDest. This will cause DllGetClassObject to return E_FAIL, which in turn is returned from CoCreateInstance.

RESOLUTION
Edit the DLLGetClassObject function found in the Cf.cpp file of the AUDIOSD sample as described below and recompile the sample:


 * 1) Replace both instances of CLSID_MMAudioSource with CLSID_MyAudioSource.
 * 2) Replace both instances of CLSID_MMAudioDest with CLSID_MyAudioDest.

STATUS
This behavior is by design.

Additional query words: SAPI 1.00

Keywords : kbmm

Issue type :

Technology :