Forward Reference... to a CDialog Class

Hi

All i want is to make a forward reference to a class that inherits from CDialog Class.

This is the class

CClienteDlg : public CDialog

All i want is to be able to create a reference pointer to the CClienteDlg to be able to call one of its methhoods from another class.

The reason i cant just include the file is cause inclusion recursion. since both classes need to comunicate eachother.

When i tried to to do the forward reference this way

class CClienteDlg;

extern CClienteDlg* DlgMain; // then i declare the global variable to the reference pointer

But i get 2 errors:


error C2065: 'IDD_Main_Dlg' : undeclared identifier

and

error C2057: expected constant expression


on this line

enum { IDD = IDD_Main_Dlg };

I been stuck in this for over a week =/, help is apreciated.