c++ inheritance

I need help with inheritance

Code:

class MemoryViewer : public CWnd
{
public:
myclass *myobj;
MemoryViewer(myclass *_myobj);
}

MemoryViewer::MemoryViewer(myclass *_myobj)
{
  myobj = _myobj;
}

class MyMemoryViewer : public MemoryViewer {
 public:
  MyMemoryViewer();
  virtual void readData(int);
};

MyMemoryViewer::MyMemoryViewer()
: MemoryViewer(myobject)
{
  setAddressSize(0);
}

class MemoryViewerDlg
{
  MyMemoryViewer my_viewer;
 public:	
  myclass *myobject ;
  MemoryViewerDlg(myclass *_myobject, CWnd* pParent = NULL);  
public:
  virtual void read(int)=0;
}

Now I want to be able to do:

myclass *myobject = new myclass;
MemoryViewerDlg *dlg = new MemoryViewerDlg(myobject);

and then I want to access myobject in the MyMemoryViewer read function?

How can I pass the arm object all the way to that function?

I don't understand what your problem is, you have the myobject as a member variable, so why not access it in the read function? Just make sure you set it correctly in the code for your constructor.

I want to pass it along to MyMemoryViewer!!!
The myobject is NOT global!

>and then I want to access myobject in the MyMemoryViewer read function?
In your constructor you would do this:

Code:

  MemoryViewerDlg(myclass *_myobject, CWnd* pParent = NULL)
  {
    myobject = _myobject;
  }

And then in read() you have access to myobject.

use an initialiser list

Code:

class MemoryViewerDlg
{
  MyMemoryViewer my_viewer;
 public:	
  myclass *myobject ;
  MemoryViewerDlg(myclass *_myobject, CWnd* pParent = NULL)
  : my_viewer(_myobject)
  {
  }
};

and don't use _varname. they are generally reserved for compiler keywords.