if (dwSize > 5000000)
{
//DeleteFile("111.log");
SYSTEMTIME localTime;
GetLocalTime(&localTime);
TCHAR newFileName[MAX_PATH];
memset(newFileName, 0, MAX_PATH * sizeof(TCHAR) );
CString nameOnly = filename;
int ind = nameOnly.Find(_T("."),0);
if (ind != -1)
nameOnly = nameOnly.Left(ind);
wsprintf(newFileName, _T("%s_%04d%02d%02d_%02d%02d%02d%s"), nameOnly,
localTime.wYear, localTime.wMonth, localTime.wDay,
localTime.wHour, localTime.wMinute, localTime.wSecond, _T(".log"));
MoveFile(filename, newFileName);
}