How to Format GetLastError code?

   When we donot know the reason why the statement is failing. Then call below function:
        DWORD errorCode=GetLastError();

   Above function will return an error code. We can translate that code into string as below.
        TCHAR errorMessage[1024] = TEXT("");
       
        DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM
            | FORMAT_MESSAGE_IGNORE_INSERTS
            | FORMAT_MESSAGE_MAX_WIDTH_MASK;
       
        FormatMessage( flags,
            NULL,
            errorCode,
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
            errorMessage,
            sizeof(errorMessage)/sizeof(TCHAR),
            NULL );