how do I pass the specific error code to vb6 via COM Interop?
 throw new COMException("SayA error", 9000);
does not work for me,
there is even no error raised in the vb6 com client...

Hello every one.....
i have a windows application an i am trying to get some data from SQL Server
and export them to Excel. I am using Windows 2000 and Excel XP. i followed
the instructions from MSDN but i get the following error message "Old format

I have developed the a class in C# using .Net framework 1.0 SDK which is derived from ServiceCompnonent. This class is hosted in IIS 6.0 and OS is Windows 2000 profesional.
Some time when server is too busy I got an exception that "The run-time environment has detected an ...

I would like to import some Excel data and are using Excel
2003 on my development system. The workstations using this
application have Excel 2000 installed. Because of this the
Excel 11.0 object reference is not working on the

I can't work out why this doesn't work - any ideas? I have tried
absolutely everything I can think of and have read as much material on
the net as I can find. I am stumped - HELP! The problem is marshalling
the string back into managed code - lvi.pszText. It is either empty or

Introduction
***************
I have a system build of a collection of 'Native COM objects' and '.NET COM interop' objects, all of the COM objects are managed through a 'Native COM' layer, this layer manage the underlying COM Objects and upon request, provide a pointer to those ...

Is it possible to add a com class to a vb.net exe app so other com apps can
interact with the vb.net app?
Thanks
Regards

How do I create email items in MS Outlook usng .NET?
Currently I am not able to create any mail item objects
from the Outlook namespace classes.
I get an error message saying "<<Class name>> is

Hy
I have a litle problem :
I have to invoke a function in an unmanaged dll (writen in C) from C#
------------------------------------------------

I have one function I'd like to call in this old dll. I
believe I am calling it correctly, because of the errors I
am getting, but it is not working.
The funtion takes these arguments:

There has been a problem with VS.NET while using mshtml interop assembly.
It gives executionengineexception for the first time it is used.  After the
failure, second request onwards, it quietly handles all the HTML processing.
Does anyone know of how to solve this problem?  Your ...

I have written a C# .NET application that uses Decision Support Object Type
library 5.1 to access an analysis server. The problem is that when the
application ends (and all processes complete normally), I get a fatal error:
"The instruction at 0x.. referenced memory at 0x... The ...

I'm new to distributed programming and I have a question concerning
interoperability between two applications. I created a .net windows
application that has to communicate with an existing application,
implemented in an older technology, that doesn't directly support .net

Hi, I have been trown into the "beutiful" world of .net vs unmanaged code..
(phu!)
And I really needs some help... (with my english too... Another story,
another posting.. :o))

I have a C# Application test program, an unmanaged C++ dll, and a unmanaged
exe application.
C# app calls the C++ dll, and the C++ dll will launch the unmanaged exe
program. The unmanaged exe program will read/write temporary files when