CMap<int,int,CPoint,CPoint> myMap;

   // Add 10 elements to the map.

   for (int i=0;i < 10;i++)

      myMap.SetAt( i, CPoint(i, i) );

   // Remove the elements with even key values.

   POSITION pos = myMap.GetStartPosition();

   int    nKey;

   CPoint pt;

   while (pos != NULL)

   {

      myMap.GetNextAssoc( pos, nKey, pt );

      if ((nKey%2) == 0)

         myMap.RemoveKey( nKey );

   }

#ifdef _DEBUG

    afxDump.SetDepth( 1 );

    afxDump << "myMap: " << &myMap << "\n";

#endif

   CMap<int,int,CPoint,CPoint> myMap;

   int i;

   myMap.InitHashTable( 257 );

   // Add 10 elements to the map.

   for (i=0;i < 200;i++)

      myMap[i] = CPoint(i, i);

   // Remove the elements with even key values.

   CPoint pt;

   for (i=0; myMap.Lookup( i, pt ) ;i+=2)

   {

      myMap.RemoveKey( i );

   }

#ifdef _DEBUG

   ASSERT(myMap.GetCount() == 100);

    afxDump.SetDepth( 1 );

    afxDump << "myMap: " << &myMap << "\n";

#endif

CMap<int,int,CPoint,CPoint> myMap;

UINT uTableSize = myMap.GetHashTableSize();

typedef CMap<DWORD,DWORD,CMyStruct*,CMyStruct*&> CMapDWordToMyStruct;

CMapDWordToMyStruct m_mapDWordToMyStruct;

POSITION pos = m_mapDWordToMyStruct.GetStartPosition();

while (pos != NULL)

{

DWORD dwKey;

CMyStruct* pMyStruct;

m_mapDWordToMyStruct.GetNextAssoc(pos, dwKey, pMyStruct);

delete pMyStruct;

}

// Remove all the fields.

m_mapDWordToMyStruct.RemoveAll();

CMyStruct* pTemp = GetDocument()->m_mapDWordToMyStruct[m_dwKey];

CMyStruct* pMyStruct;

m_mapDWordToMyStruct.Lookup(m_dwKey, pMyStruct);

CMyStruct* pMyStruct = new CMyStruct();

m_mapDWordToMyStruct[m_dwKey] = pMyStruct;

m_mapDWordToMyStruct.Serialize(ar);

typedef CMap<CString,LPCSTR,CRect,CRect&> CMapCStringToCRect;

CMapCStringToCRect mapStrToRect;

BOOL CScaleDlg::OnInitDialog() 

{

CDialog::OnInitDialog();

CFile mFile;

if(mFile.Open(theApp.GetCurDir()+"dlgStatus.sav",CFile::modeRead)&& mFile.GetLength()>0 )

{

CArchive ar(&mFile,CArchive::load);

mapStrToRect.Serialize(ar);

ar.Close();

mFile.Close();

CString strWindow;

GetWindowText(strWindow);

CRect rectDlg;

BOOL bSuc=mapStrToRect.Lookup(strWindow,rectDlg);

if(bSuc)

MoveWindow(rectDlg);

}

return TRUE;

}

void CScaleDlg::OnDestroy() 

{

CDialog::OnDestroy();

CRect rectDlg;

GetWindowRect(&rectDlg);

CString strWindow;

GetWindowText(strWindow);

mapStrToRect.SetAt(strWindow,rectDlg);

CFile mFile;

mFile.Open(theApp.GetCurDir()+"dlgStatus.sav",CFile::modeCreate|CFile::modeWrite);

CArchive ar(&mFile,CArchive::store);

mapStrToRect.Serialize(ar);

ar.Close();

mFile.Close();

}

class CStringObject : public CObject

{

public:

            CString m_String;

            CStringObject() {};

            CStringObject(LPCSTR String) : m_String(String) {};

// Copy constructor required by CMap.

CStringObject(const CStringObject& n)

{

            m_String = n.m_String;

            }

// Operator= is required by CMap.

CStringObject& operator=(const CStringObject& n)

 {

            m_String = n.m_String;

            return *this;

            }

BOOL AFXAPI operator==(const CStringObject& n) const

{

            return m_String == n.m_String;

            }

};

template<>inline UINT AFXAPI HashKey(CStringObject& key)

{

return HashKey((LPCTSTR)key.m_String);

}

typedef CMap<CStringObject, CStringObject&, CStringObject, CStringObject&> CStringMap;

The following is a sample use of the CStringMap class.

CStringObject KeyString, DataString, One("One"), Two("Two");

CStringMap StringMap;

POSITION Position;

StringMap[One] = CStringObject("First");

StringMap[Two] = CStringObject("Second");

Position = StringMap.GetStartPosition();

while (Position!=NULL)

{

StringMap.GetNextAssoc(Position, KeyString, DataString);

cout << (LPCSTR)KeyString.m_String << ' ' << (LPCSTR)DataString.m_String << '\n';

}

cout << (LPCSTR)StringMap[One].m_String << '\n';

StringMap.RemoveAll();