I've been following the 'tutorials' of how to expose a .NET framework through COM ( http://msdn.microsoft.com/en-us/library/zsfww439.aspx and http://msdn.microsoft.com/en-us/library/bd9cdfyx.aspx ). Everything works except for the events part. When I add events to the C# interface the following C++ code is generated:
struct __declspec(uuid("..."))
_MessageEventHandler : IDispatch
{};
struct __declspec(uuid("..."))
IConnection : IDispatch
{
virtual HRESULT __stdcall add_MessageEvent (
/*[in]*/ struct _MessageEventHandler * value ) = 0;
virtual HRESULT __stdcall remove_MessageEvent (
/*[in]*/ struct _MessageEventHandler * value ) = 0;
}
The problem is that I haven't found any info on how to use this in C++. Do I need to derive from _MessageEventHandler
and implement operator()
? Or something else entirely?
(Note that for the moment I'm also trying the more documented approach of using IConnectionPointContainer and IConnectionPoint.)