Category Archives: COM

The Demise of CAPICOM

CAPICOM, a COM-based wrapper for the CryptoAPI library, is deprecated and on its way out. However, Microsoft has no time line for phasing it out, nor have they provided sufficient documentation of alternatives. Many CAPICOM pages contain a confusing, bright-red … Continue reading

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CoCreateInstance Fails With “Class Not Registered”

Recently, I had a problem unique to my test machine. Attempting to call CoCreateInstance on a COM class provided by one of our DLLs resulted in HRESULT 0×80040154, which corresponds to “Class not registered”. This was a mystery since regsvr32 … Continue reading

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