i'm faced with implementing an IDispatch interface. There are four methods, and fortunately 3 of them are easy: function TIEEventsSink.GetTypeInfoCount(...): HResult; { Result := E_NOTIMPL; } fu...

I'm using Invoke for late binding on a legacy COM objects that supports IDispatch. This seems necessary as .NET's Type.GetMethod Type.InvokeMember do not seem to work on these objects. The followi...

I applied Invoke to use object of an application in C++ but an error occurred. error:information not available, No symbols loaded for GPNSAutomation.dll My codes is : ::CLSIDFromProgID(OLESTR("SG...

I am implementing a c# COM client against a C++ COM server. The COM client functions correctly when I mark the COM interface as "Dual" but it throws an InvalidCastException when I remove the "Dual"...

I tried looking around but was not able to convince myself with an answer as the world of COM/ActiveX seems to be very confusing. Basically what I want to know is, given the GUID, is there a way to...

I'm trying to write a bit of code (just for home use) that uses UPnP for NAT traversal, using C# 4 and Microsoft's COM-based NAT traversal API (Hnetcfg.dll). Unfortunately (or perhaps fortunately)...

I use WM_COPYDATA to enable communication between my two processes A and B. There is no problem to exchange data with basic data types. Now I have a problem, in some case I want to pass an Interf...

I'm writing some test code to emulate unmanaged code calling my c# implementation of a late binding COM object. I have an interface that is declared as an IDispatch type as below. [Guid("2D570F1...

The Question My question is: Does C# nativly support late-binding IDispatch? Pretend i'm trying to automate Office, while being compatible with whatever version the customer has installed. ...

Every time I build my C# Solution, I get a handful of warnings about interfaces that I've never seen or written. I tried Googling for some of them, but get no hits. Could these possibly be buried i...

A dual interface in COM is one that is able to be accessed via a DispInterface or via VTable methods. Now can someone tell me what is exactly what the difference is between the two methods? I tho...

I need to compile some code of mine using the gcc compiler included in the R tools (R the statistical program for windows), the problem is that I need to use IDispatch in my code to create an acces...

I can't wrap my head around the differences among these terms. Are COM and ActiveX synonyms? Is ActiveX object just a COM object that exposes IDispatch? Lots of older MSDN pages mention IDispa...