Is there a way to get the string representation of HRESULT value using win API?

Question

Is there a function in win API which can be used to extract the string representation of HRESULT value?

The problem is that not all return values are documented in M

Answer 1

Here's a sample using FormatMessage()

LPTSTR SRUTIL_WinErrorMsg(int nErrorCode, LPTSTR pStr, WORD wLength )
{
    try
    {
        LPTSTR  szBuffer = pStr;
        int nBufferSize = wLength;

        //
        // prime buffer with error code
        //
        wsprintf( szBuffer, _T("Error code %u"), nErrorCode);

        //
        // if we have a message, replace default with msg.
        //
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
                NULL, nErrorCode,
                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
                (LPTSTR) szBuffer,   
                nBufferSize,    
                NULL );
    }
    catch(...)
    {
    }
    return pStr;
} // End of SRUTIL_WinErrorMsg()