CoInitialize fails in dll

Posted by Quandary on Stack Overflow See other posts from Stack Overflow or by Quandary
Published on 2010-04-18T13:27:45Z Indexed on 2010/04/18 13:33 UTC
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Question: I have the following program, which uses COM to use the Microsoft Speech API (SAPI) to take a text and output it as sound.

Now it works fine as long as I have it in a .exe. When I load it as .dll, it fails. Why?

I used dependencywalker, and saw the exe doesn't have MSVCR100D and ole32, so I loaded them like this: LoadLibraryA("MSVCR100D.DLL"); LoadLibraryA("ole32.dll"); but it didn't help...

Any idea why ?

#include <windows.h>
#include <sapi.h>
#include <cstdlib>

int main(int argc, char* argv[])
{
ISpVoice * pVoice = NULL;

if (FAILED(::CoInitialize(NULL)))
    return FALSE;

HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **) &pVoice);
if( SUCCEEDED( hr ) )
{
    hr = pVoice->Speak(L"Noobie was fragged by GSG9 Googlebot", 0, NULL);
    hr = pVoice->Speak(L"Test Test", 0, NULL);
    hr = pVoice->Speak(L"This sounds normal <pitch middle = '-10'/> but the pitch drops half way through", SPF_IS_XML, NULL );
    pVoice->Release();
    pVoice = NULL;

}

::CoUninitialize();
return EXIT_SUCCESS;
}

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