I am not the greatest at COM Interop.  I understand cleaning up your
resources, but usually I am using a VS generated interop library, or
primary interop assemblies.  Making API Calls is somewhat new to me.
Could someone please explain to me why the code at

I'm currently expanding the capability of an Access 2000 database for
a customer who's limited by the "regime" of it's IT-department.
The client wishes to do things in his Access 2000 (with VBA) that are
easily done in (vb).NET.

   I am trying to save data from a dataview to an excel spreadsheet.
The data volume is quite huge. As per the recommendation from MS
article, I dump all the data from the Data View to a 2D array and then
use Excel.Range to pump all the data to the spreadsheet. It used to

Hey folks,
I'm trying to DllImport the SendMessage and SetWindowTheme APIs, but
maintain backward compatibility with Win2k and stay cross-platform
with Mono.  So I need a way to import these APIs if they are there but

In a VB.Net program I am opening an Excel workbook, adding some data,
and then saving the file. My code is:
Dim xlApp As New Excel.Application
Dim wb As Excel.Workbook

I'm having some issues I hope someone can assist me with.
I have a VB6 application which needs to interact with a VB.NET
assembly (dll).  The VB6 application is being developed on a separate
PC from my .NET development PC.  I have setup the .NET assembly for

I try to set an overlay image for items  in winforms listview using
the following simple code. Do you see any mistakes (because
sendmessage returns 1, but nothing happens - no overlay image is
set) ?:

I am firing an event on one form that is getting handled on another.
Following is my basic code:
__________________________________________
ON FORM #1:

I am baffled by this problem and was hoping that somebody could help me out.
I have a COM DLL that was created by Delphi that I am calling indirectly
within my web service.  The WS is calling a .NET component that calls the
COM DLL.  I unit test the .NET component and it works ...

I have working sample of C# code that creates and writes into Excel
file simple text.
And this is not hard as there is a lot of samples at microsoft's msdn
site:

Suppose I have a native COM class A which implements an interface ITest,
and a native COM class B which features a member function taking a
parameter of type ITest. With normal COM Interop, I can call this
function in C# by explicitely casting to ITest as in

Hi. I posted a while back about an interop question sending a string
from C++ to C#. I got the executable for that working just fine. Now,
I'm going to change it to an ISAPI dll so we can use this program
through our web server and it seems to be getting some kind of error

I have some code in C++ i want to call this code from C# i have tried
ref , out, & everything i can´t fix this error
the following code shows the C++ and the call from C# and the compiler
error

I'm currently exporting a powerpoint presentation to jpg. It works
fine till there is a graph object embed in the presentation. In this
case the resulting image apears as a white empty image. The code i'm
using is as follows:

I'm having a bad experience with C# and interop and I hope some one can
share a little light on my dilemma.
We have a third party VB6 com object that our C# 2005 app is utilising. We
are early binding so the application is using interop. Every thing is working