Forgive me if this is a naive question, but I have very little COM knowledge.
Every once in a while I run into a System.__ComObject, especially when writing
addins, that I end up not being able to use because there is no associated
doucmentation either in help or on the web. Is ...

Is it necessary to ship the "Interop.XX" files that get created when
you add references to COM libraries, our app seems to run just fine
without them and I suspect that by shipping them we might be causing a
problem.

What I mean is that we want to be able to run with MDAC 2.7 or MDAC
2.8, however, it seems to hardcode in the version we add as a
reference but we can run just fine with both.

I have one problem, I cannot solve. The problem is in dynamic load of one assembly from another. I am working with Visual Studio .NET and built one assembly as .exe file. The second assembly is a class library type .dll. I simply trying to load the second assembly, create object ...

I have an application that uses an external C(?)  Dll and it seems like
after I make a specific call to that dll the application will crash at a
random call to the dll in the future.  It sometimes crashes the next call
after said call, while sometimes it doesn't crash for 5 minutes; ...

I've built a wrapper in C# to use a mainframe interation API that was built into a VB5 dll.  Most of the calls work fine, but I'm finding that one call in particular - it looks at a position on the screen and returns the string of requested length - works HALF correctly.  It ...

I was wondering if it is possible to do reflection when using objects
crated from the Office Primary Interop Assemblies.  I'd like to be
able to inspect properties of a few Excel objects at runtime.
Thanks,

Hi,
I am using C++ dll (dynamic-linked library, not COM ATL) in my VB.NET
program. when i pass a VB.Net 'String' object to one of the function
of dll that modifies the string, it works fine. dll code is like:

Mattias, please help me.
I don't expect you to do my programming for me, just shine a little light
into the black void of unmanaged type marshalling.
I'm trying to host the scripting engine. In fact I've already got this

I built in .NET a 'class library' project , which then I
compiled with "Register for COM interop".
I also added some events.
I use this component in VB6, but I can't hook up to the

I am using a c native library create by Third party and need to call the same from my code in C# Windows App
Can someone guide me how can I call unmanaged code from managed code
The signature of function I have to call is
Funx(char ** OutBuffer, long * OutBufferLen, const char * ...

I'm trying to access a COM Component with C#. And I get the following error
C:\Visual C# Step by Step\Lesson 1\USB\Form1.cs(172): Method 'USB.Form1.button5_OnChange(object, System.EventArgs)' does not match delegate 'void BDaq._IBBDaqEnumEvents_OnChangeEventHandler()
C:\Visual C# ...

I have an Excel macro in an xla addin that calls the Workbooks.Open method. The piece of code works fine if I just execute it from Excel normally
However, if I call the macro via an instance of Excel that is hosted in Internet Explorer (in .Net as it happens) the Workbooks.Open ...

Has Microsoft released a PIA for Outlook 2000? Using the auto generated PIA
is quite a pain.
TIA,
Bill Cohagan

I have .NET components which need to use "legacy" COM dlls, which in turn
use MSXML 4.0 and  MSXML2.
However, when I build the project, I keep getting the following message:
"The dependency 'MSXML2' could not be found"