PRB: AUDIOSD Sample Returns E_FAIL from CoCreateInstance

 Last reviewed: February 22, 1996
Article ID: 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 reference words: SAPI 1.00
KBCategory: kbmm kbprb
KBSubcategory: MMSpeech

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Last reviewed: February 22, 1996
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