Failed to initialize COM library error

Le rner

Hi all, I have made a exe using VS-2008. I am trying to run that exe on another pc which not having VS-2008 inatalled on it (having OS - win xp with sp3), in my exe i have initialised COM using this code.

hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres))
{
AfxMessageBox(_T("Failed to initialize COM library") );
return; // Program has failed.
}

But every time i run my exe on this machine it gives "Failed to initialize COM library". Do i need to install anything extra on this machine... Or what other problem there might be? Can anybody help me in this... Thanks in advance

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CPallini

You should check better the function return value (make your program reporting it). See the documentation for details [^]. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

Durga_Devi

HI, For the function CoInitializeEx(), dont check for the returned code. Because if the COM has been initialized on the calling thread, the return code will be failed i.e S_FALSE. Just call the CoInitializeEx() and proceed to next.

CPallini

DurgaDevi_hr wrote:

For the function CoInitializeEx(), dont check for the returned code. Because if the COM has been initialized on the calling thread, the return code will be failed i.e S_FALSE.

Your point is wrong. In fact, CoInitializeEx() may return S_FALSE the way you depicted. However FAILED(S_FALSE) evaluates to false. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

transoft

Did you register COM in the new machine? Using following function always successes for me.

hr = CoCreateInstance( CLSID_App, NULL, CLSCTX_INPROC_SERVER, IID_IUnknown, (void **) &pUnk );