Create a pointer to an existing Object....

you dont need a pointer to the parent class. if you want to make sure that the parent method is called then explicitly call it:
CListCtrl::func();

Nothing more to say ...

I dont want to call a Function of CListCtrl. I want to call a non-static function of CMyProjectDialog. In this class I've got an Object of CMyListCtrl. Now I want to call a function of CMyProjectDialog out of CMyListCtrl.
I hope this is a better description of my Problem.

Does CMyListCtrl have a pointer to CMyProjectDialog?

If not, you need to add a member variable to CMyListCtrl that is of a pointer type of CMyProjectDialog, and then have CMyProjectDialog initialize this variable via a function in CMyListCtrl.

It looks like brazulewicz posted a similar method to my suggestion before my post went through.

I've had problems using brazulewicz method in the pass with VC++ 6.0.  It doesn't like it when you use "this" in the initialize list.

An alternative method could be the following:
class CMyProjectDialog;

class CMyListCtrl
{
private:
 CMyProjectDialog* parent;

public:
 CMyListCtrl():parent(NULL)
 {}
 Initialize_CMyProjectDialog(CMyProjectDialog* aParent)
 {
  parent = aParent;
 }
 sampleMethod()
 {
   parent->sampleDialogMethod();
 }
}

class CMyProjectDialog
{
private:
CMyListCtrl list;
public:
CMyProjectDialog();
sampleDialogMethod();
};

CMyProjectDialog::CMyProjectDialog()
{
 list.Initialize_CMyProjectDialog(this)
}

it seems to me you have soled your problem.

Thank you very much