for (int iFile =  0 ; iFile < m_vsFiles.size(); iFile++) {
   Send(m_vsHeads[iFile]);
   if (!SendFile(m_vsFiles[iFile])) return false;
   SendLine();
}
Send(m_sBoundary + "--\r\n");
SendLine();
// здесь файла уже НЕТ!

FILE *stream;
if (fopen_s(&stream, fileName.c_str(), "rb")) {
   SetLastError(ERROR_FILE_OPEN);
   return false;
}
	
size_t	numread;
char	buf[MAX_BUF];
	
while(!m_bStop && (numread = fread(&buf, sizeof(char), MAX_BUF, stream)) >  0 ) {
   Send(buf, numread,  0 );
   m_nSendBytes += numread;
}
fclose(stream);

bool b = (fopen_s(&stream, m_vsFiles[ 0 ].c_str(), "rb") && fclose(stream));