Re: how to write a base implementation class for common activex contro?

"Igor Tandetnik" <>
Wed, 9 Aug 2006 22:00:07 -0400
"thinktwice" <> wrote in message

most atl activex control class would look like this

class ATL_NO_VTABLE CMyControl:
public CComObjectRootEx<CComSingleThreadModel>,
public IDispatchImpl<IMyControlInterface, &IID_IMyControlInterface,
public CComControl<CMyControl>,
public IPersistStreamInitImpl<CMyControl>,
public IOleControlImpl<CMyControl>,


is it possible to write a common base class so i could just write my
control like this
class CMyControl: public CBaseControlImpl<CMyControl, TInterface,
TEventInterface, clisid, libid...>

I don't see why not. Something like

template <class T, CLSID* clsid, ...>
class CBaseControlImpl :
    public CComObjectRootEx<CComSingleThreadModel>,
    public CComControl<T>,
    public IPersistStreamInitImpl<T>,
    public IOleControlImpl<T>,

class CMyControl :
    public CBaseControlImpl<CMyControl, ...>,
    typename CBaseControlImpl<CMyControl, ...> BaseClass;

With best wishes,
    Igor Tandetnik

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