C / C++ / MFC

class MyOwner
{
public:
MyClient m_client;
.
.
};

class MyClient
{
public:
MyOwner* m_owner;

MyClient( MyOwner* Owner )
{
m_owner = Owner;
}

}; 

class MyClient;

class MyOwner
{
.
.
.
}

class MyOwner;

class MyClient
{
.
.
.}

class MyOwner;
class MyClient
{
  MyOwner * m_pOwner;

public:
 MyClient(MyOwner * pOwner):m_pOwner(pOwner){}
 void doStuff();
};


class MyOwner
{
  friend class MyClient;
private:
  int m_iHiddenSecret;
	
public:
  MyOwner (int iTheSecret) 
  { 
    m_iHiddenSecret = iTheSecret;
    m_pClient = new MyClient(this);
  }
  ~MyOwner()
  {
    delete m_pClient;
  }

  MyClient * m_pClient;
};


void MyClient::doStuff()
{
  cout << "Now we all know the secret is: " << m_pOwner->m_iHiddenSecret << endl; 
}

Mark Salsbery wrote:

Tough room!

HDC hDC = ::GetDC(NULL);
int x,y;
x = rand() % 600;
y = rand() % 600;
COLORREF cr = GetPixel(hDC, x, y);
CString szMsg;
szMsg.Format(_T("(%d %d) = { %d, %d, %d}"), x,y, GetRValue(cr), GetGValue(cr), GetBValue(cr));
AfxMessageBox(szMsg);
::ReleaseDC();