How do I get specific error information from GetFile()?

Question

void GetFtpFile(LPCTSTR pszServerName, LPCTSTR pszRemoteFile, LPCTSTR pszLocalFile)
{
   CInternetSession session(_T("My FTP Session"));
   CFtpConnection* pConn = NULL;

   pConn = session.GetFtpConnection(pszServerName);
   //get the file
   if (!pConn->GetFile(pszRemoteFile, pszLocalFile))
   {
      //display an error
   }
   delete pConn;
   session.Close();
}

How do I get specific error information from GetFile()?

Thank You.

Answer 1

What about GetLastError()?

Answer 2

According to the MSDN it's GetLastError()

Answer 3

According to MSDN:

Return Value

Nonzero if successful;

otherwise 0. If the call fails, the Win32 function GetLastError may be called to determine the cause of the error.

GetLastError() returns an error code, but you can call FormatMessage() to get a human-readable string from the error code. Here's a utility function that does that for you:

std::string formatwinerr(unsigned long errCode)
{
    LPVOID lpMsgBuf;

    FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM ,
        0,
        errCode,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
        (LPTSTR) &lpMsgBuf,
        0, NULL );

    std::string ret((const char*)lpMsgBuf);

    LocalFree(lpMsgBuf);

    return ret;
}