Hi Ralph and others,

I have found the solution, 'virtual fonction' ... Pffff, i was afraid with
that 'ATL Class' created by the ATL Wizard. (my first one).
No need of Pointer of member function (no headeache !) So here it is:

________________________________________________________________________

class CclassB :
{

public:
// Wil be executed by an event in Process 2 (Exe application)
virtual void Fire_mouse (double, double);
}
________________________________________________________________________

class ATL_NO_VTABLE CclassA :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CclassA, &CLSID_classA>,
public IConnectionPointContainerImpl<CclassA>,
public IDispatchImpl<IclassA, &IID_IclassA,
&LIBID_EDSPYACCLib>,
public CProxy_IclassAEvents< CclassA >,
public CclassB // <==== I have added my class to the mutiple
heritance existing yet

{
public:
CclassA()
{
}

// will fire an event in Process1, (visual basic form, single Exe)
virtual void Fire_mouse (double, double);
}
_________________________________________________________________________

===> When an event is catched in CclassB, the Fire_mouse fonction of ATL
CclassA is executed.
What ever this fonction is doing in CclassB, it execute everything of the
ATL CclassA 'Fire_mouse' Function.
Now i'm sure it works also with ATL class ...

.... always trying to reinvente the wheel ! ... So difficult to make it easy
.... :-)

Thank's Ralph.