Hi,

Do MTS components support COM Exceptions? In ATL object wizard, for objects
of type MS Transaction Server, there is no attribute like 'Support
ISupportErrorInfo'. And also if I try to manually implement
ISupportErrorInfo, I am receiving unhandled memory exception error from the
client.

Thanks,
Palaniappan Ganesh.

Just add
    public ISupportErrorInfoImpl<&IID_IYourInterface> to the declaration
and
    COM_INTERFACE_ENTRY(ISupportErrorInfo)
in the COM Map in the header file. Nothing to do in the corresponding CPP
file.

HTH
Hardy

An example is as follows:

////////////////////////////////////////////////////////////////////////////
/
// CCARSwareUser
class ATL_NO_VTABLE CCARSwareUser :
 public CComObjectRootEx<CComSingleThreadModel>,
 public CComCoClass<CCARSwareUser, &CLSID_CARSwareUser>,
 public ISupportErrorInfoImpl<&IID_ICARSwareUser>,
 public IObjectControl,
 public IDispatchImpl<ICARSwareUser, &IID_ICARSwareUser, &LIBID_CWSLIB>
{
public:
 CCARSwareUser()
 {
 }

DECLARE_REGISTRY_RESOURCEID(IDR_CARSWAREUSER)

DECLARE_PROTECT_FINAL_CONSTRUCT()

DECLARE_NOT_AGGREGATABLE(CCARSwareUser)

BEGIN_COM_MAP(CCARSwareUser)
 COM_INTERFACE_ENTRY(ICARSwareUser)
 COM_INTERFACE_ENTRY(IObjectControl)
 COM_INTERFACE_ENTRY(IDispatch)
 COM_INTERFACE_ENTRY(ISupportErrorInfo)
END_COM_MAP()

// IObjectControl
public:
 STDMETHOD(Activate)();
 STDMETHOD_(BOOL, CanBePooled)();
 STDMETHOD_(void, Deactivate)();

 CComPtr<IObjectContext> m_spObjectContext;

// ICARSwareUser
public:
 STDMETHOD(IsValid)(/*[in]*/ BSTR bstrLawFirm, /*[in]*/ BSTR bstrUserID,
/*[in]*/ BSTR bstrPassword, /*[out, retval]*/ VARIANT_BOOL* pbValid);
 STDMETHOD(GetConnectionString)(/*[in]*/ BSTR bstrLawFirm, /*[out, retval]*/
BSTR* bstrConnectionString);

private:
    void GetUserDatabaseDSN(TCHAR* szDSN);