GetErrorInfo returns S_FALSE in WIN32 API

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I am devloping on win32 console application in which some comm componant are used.But for little test i check out the function GetErrorInfo before any impementation.I found that i will return me S_FALSE at all condtion. Following is my simple code not working..
#include "stdafx.h"

C++

#include  "Windows.h"
#include "atlsafe.h"
#include "atlconv.h"
#include "time.h"
#include "WinError.h"

int _tmain(int argc, _TCHAR* argv[])
{
    HRESULT hr44;
    CComPtr<IErrorInfo> pErrInfo; 
    hr44 = ::GetErrorInfo( 0, &pErrInfo );
    return 0;
}

is i am missing some thing..

Posted 2-May-13 2:04am

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Jochen Arndt · Accepted Answer · 2013-05-02T02:20:00

See GetErrorInfo[^] in the MSDN:

Quote:
Obtains the error information pointer set by the previous call to SetErrorInfo in the current logical thread.

If you got the return value

Quote:

S_FALSE There was no error object to return.

, no error info has been set by a COM function which is obvious because you did not have called any COM function.