C++ ATL Outlook plugin does not load

Question

I have made an Outlook plugin for 64 bit version of Outlook 2013 using Visual Studio Community 2013. I want to work with attachments from mail when sending mails. The plugin is not loaded by Outlook even though LoadBehavior=3 in the registry and if I try to load it in Outlook, I get nothing.

So there is the beginning of the header of my class CConnect:

class ATL_NO_VTABLE CConnect :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CConnect, &CLSID_Connect>,
public IDispatchImpl<IConnect, &IID_IConnect, &LIBID_PluginOutlookLib, /*wMajor =*/ 1, /*wMinor =*/ 0>,
public IDispatchImpl<_IDTExtensibility2, &__uuidof(_IDTExtensibility2), &LIBID_AddInDesignerObjects, /* wMajor = */ 1>,
public IDispEventSimpleImpl < 1, CConnect, &__uuidof(Outlook::ItemEvents) >
{
public:
CConnect()
{
};
void __stdcall OnSend(IDispatch * Item, bool Cancel);

BEGIN_SINK_MAP(CConnect)
    SINK_ENTRY_INFO(1,__uuidof(Outlook::ItemEvents),0x0000F005,OnSend,&fiMailItemEvents)
END_SINK_MAP()

DECLARE_REGISTRY_RESOURCEID(IDR_CONNECT)

BEGIN_COM_MAP(CConnect)
    COM_INTERFACE_ENTRY(IConnect)
    COM_INTERFACE_ENTRY(_IDTExtensibility2)
END_COM_MAP()

There is an entry in the registry for the plugin.

Does someone have a good idea how to to load the plugin successfully in Outlook?

If an attachment have a size bigger than msize I want to save it with SaveAsFile() and to proccess it.

What are the arguments of Attachment::SaveAsFile() I didn't find them in the documentation and is there any method Attachment::size()?

Answer 1

Are you trying to handle the Send or ItemSend event?

What are the arguments of Attachment::SaveAsFile() I didn't find them in the documentation and is there any method Attachment::size()?

See the SaveAsFile method description in MSDN.

Also you may find the Size property of the Attachment class helpful.