Trying to create MFC-based automation/COM Dll to be invoked from JScript

Hi everyone:

I should admit, that I do not have much experience working with COM/automation. My goal is to create a C++ module whose methods could be exposed/called by a JScript script running in a .JS file via the Windows Script Host.

In other words, when I call the following from JScript:

It should invoke my Show() C++ method in the DLL.

So I did some research and found this and this articles.

Now, trying to combine them into my own MFC-based DLL, I did the following:

1. I went into VS 2008 and created a template MFC DLL with support for automation (using the VS wizard.)

2. I then added the code from the second article:
http://www.codeproject.com/Articles/...C-applications
to implement the COM methods.

But the issue is that I'm probably missing something due to my limited knowledge of COM/automation.

My project seems to compile but the linker gives me this error:

Note that IID_ITestComObjMFC is not defined anywhere in the project directly. It's later added to a TestComObjMFC32_i.c file that is created by the MIDL compiler (if I understand it correctly.)

I tried studying a similar project from the link above which doesn't seem to produce this error but I can't see what's different in my case.

I'll attach my test VS 2008 solution here. (For simplicity, I disabled automatic COM registration is Solution Properties -> Linker -> Register Output.)

Can someone please take a look?

Also, is my implementation of the method described above correct?

PS. I can't reuse the first C-only project, since I need to use MFC in my DLL (my existing libraries are written with it.)

Attached Files

• TestComObjMFC32.zip (13.8 KB)