Re: How to get standard toolbar button to do more than load COM object

From: Jan (biteme_at_nospam.com)
Date: 09/27/04 

Date: Mon, 27 Sep 2004 17:37:46 +0100

Sorry. I didnt include the class declaration. Here it is.

class ATL_NO_VTABLE CMvCbutton :
 public CComObjectRootEx<CComSingleThreadModel>,
 public CComCoClass<CMvCbutton, &CLSID_MvCbutton>,
 public IObjectWithSiteImpl<CMvCbutton>,
 public IDispatchImpl<IMvCbutton, &IID_IMvCbutton, &LIBID_MICROVENDCBLib>
{
 public:

  CMvCbutton();

  DECLARE_REGISTRY_RESOURCEID(IDR_MVCBUTTON)

  DECLARE_PROTECT_FINAL_CONSTRUCT()

  BEGIN_COM_MAP(CMvCbutton)
   COM_INTERFACE_ENTRY(IMvCbutton)
   COM_INTERFACE_ENTRY(IDispatch)
   COM_INTERFACE_ENTRY(IObjectWithSite)
  END_COM_MAP()

  // IOleObjectWithSite Method

  STDMETHOD(SetSite)(IUnknown * pUnkSite);

  // IOleCommandTarget Methods

  STDMETHOD(Exec)(const struct _GUID *,
                  unsigned long,
                  unsigned long,
                  struct tagVARIANT *,
                  struct tagVARIANT *);

  STDMETHOD(QueryStatus)(const struct _GUID *,
                         unsigned long,
                         struct _tagOLECMD [],
                         struct _tagOLECMDTEXT *);
 private:

  IWebBrowser2 * _pFrameWB;
  HWND _hwndParent;
  IInputObjectSite * _pSite;
};

Thanks,

Jan

"Jan" <biteme@nospam.com> wrote in message
news:ej$N46KpEHA.896@TK2MSFTNGP12.phx.gbl...
> Hi,
>
> I added QueryStatus() to my class but still no joy. Do I have to implement
> QueryInterface() in my class?
>
> Thanks,
>
> Jan
>
> "Igor Tandetnik" <itandetnik@mvps.org> wrote in message
> news:uN5nymKpEHA.1992@TK2MSFTNGP09.phx.gbl...
> > "Jan" <biteme@nospam.com> wrote in message
> > news:OIjjCeKpEHA.2536@TK2MSFTNGP10.phx.gbl
> > > "Igor Tandetnik" <itandetnik@mvps.org> wrote in message
> > > news:ewD$4sJpEHA.592@TK2MSFTNGP11.phx.gbl...
> > >> "Jan" <biteme@nospam.com> wrote in message
> > >> news:uWC7756oEHA.1152@TK2MSFTNGP11.phx.gbl
> > >>> How do I get a button added to the standard toolbar to do more than
> > >>> load the associated COM object? I.e. call the loaded COM object
> > >>> again when the button is clicked again.
> > >>
> > >> It does so. IOleCommandTarget::Exec is called every time the button
> > >> is clicked. Do you implement this interface?
> > >
> > > I'm new to COM. I presume by "implement interface" you mean more than
> > > simply add Exec() to my derived class (as I tried that with no joy).
> >
> > Then, I guess, you should start with a COM textbook.
> >
> > > My COM object was created using VC6: ATL COM AppWizard (default
> > > options), New ATL Object > Internet Explorer Object (default options).
> >
> > Show the declaration of the class. What interfaces does it derive from?
> > What interfaces are listed in the interface map?
> >
> > > Only SetSite() and now Exec() are defined in my class.
> >
> > Then it is clear you don't implement the necessary interfaces. To
> > implement an interface, you must implement all its methods, otherwise
> > the compiler would complain. In case of IOleCommandTarget, that means
> > Exec and QueryStatus.
> > --
> > With best wishes,
> > Igor Tandetnik
>
>