using toupper() with m_pSet-> ODBC, VC++4.0

In this code, I'm doing a search...taking 5 member variables that are pointed to by the m_pSet-> pointer, then putting them into a CString variable, to then compare what was entered in a search string edit box. It might not be the best way to go, but it works...VC++ 4.0 doesn't have find functions in it. My problem is, I want to take the CString data in the fields and the CString data entered as search criteria in the search edit box, and convert them both to upper before doing a search, because the data could be in either case. I tried using the toupper() function, but I'm having a problem because I need to take a CString variable as my source. Can you help me out? Any other way of doing this? Again I'm using Microsoft VC++ ver4.0. Thanks!
Here is my code, excluding any conversion attempts. Got any suggestions? I want to start conversion after I attribute the m_pSet-> pointers to CString variables.

void CPieces3CLRView::OnGoCheckBox()
{
      //Transfer find edit box string to variable
      UpdateData(TRUE);      
      //Move to the first record
      m_pSet->MoveFirst();
      Nrec=0;      //number of records set to zero before count.
      
      //***************
      //Count number of records in recordset
      CPieces3CLRSet rsPieces3CLRSet(NULL);
      rsPieces3CLRSet.Open( );      
      while(!rsPieces3CLRSet.IsEOF())
      {
            rsPieces3CLRSet.MoveNext();
            //Nrec is number of records; external variable
            //seen to whole file
            Nrec+=1;
      }
      rsPieces3CLRSet.Close();
      //***************
      //Index is external; seen by whole file.
      for(Index=1;Index<Nrec;Index++)
      {
            //line 100***Put first field data into a                  //string variable
//This is where i must convert the variables to uppercase
            CString strMarque =m_pSet->m_MARQUE;      
            CString strModele = m_pSet->m_MODELE;
            CString strPiece = m_pSet->m_PIECE;
            CString strDescription = m_pSet->m_DESC;
            CString strTiroir = m_pSet->m_TIROIR;
      
            
            

            //Compare string variable with edit box data                 //variable
            if(strMarque == m_SearchEditBox)
            {
                  //Display current record
                  UpdateData(FALSE);
                  MessageBeep((WORD)-1);
                  break;
            }
            if(strModele == m_SearchEditBox)
            {
                  //display current record
                  UpdateData(FALSE);
                  MessageBeep((WORD)-1);
                  break;
            }

            if(strPiece == m_SearchEditBox)
            {
                  //display current record
                  UpdateData(FALSE);
                  MessageBeep((WORD)-1);
                  break;
            }

            if(strDescription == m_SearchEditBox)
            {
                  //display current record
                  UpdateData(FALSE);
                  MessageBeep((WORD)-1);
                  break;
            }            
            m_pSet->MoveNext();            
      }
      m_DerniereRechercheEditBox = m_SearchEditBox;
      m_SearchEditBox= "";      
      m_ctlSearchEditBox.SetReadOnly(TRUE);
      m_GoCheckBox = FALSE;      
      UpdateData(FALSE);      
      return;

      
      
}