Re: Large text files and searching text

So far so good.
Please see last portion of code for what I still need to do.

void CMyDlg::OnLbnSelchangeList1()
{
 int nSelect;
 nSelect = c_List1.GetCurSel();
 CString cSelect;
 c_List1.GetText( nSelect, cSelect );

 CString JobFile;
 JobFile = _T("C:\\MyFolder\\"); //re-apply main part of
original path
 JobFile += cSelect; //add filename selected
 JobFile += _T(".txt"); //re-apply file extension

 CString mess;
 mess.Format(_T("Would you like to load \"%s\" as top ?"), cSelect);
 int a = AfxMessageBox(mess, MB_ICONQUESTION | MB_YESNO);
 if(a != IDYES)
   return;
 CFile in;

 if(!in.Open(JobFile, CFile::modeRead)){
   DWORD err = ::GetLastError();
   CString msg;
   msg.Format(_T("Error opening file: %d"), err);
   AfxMessageBox(msg);
   return;
 }

 //read entire file into string
 //search string for a "keyword"
 //copy x bytes from this point forward to another string
}

Please advise how to do the 3 things I need above.
The text file can be as large as 100mb and the copied portion can be as
large as 10mb.
Thanks,