How to get the list of the users connected to my system?

I am trying to use .NET with Excel. I installed Office 2003 and selected
.NET programming suport option, so it installed all those PIA, as MS
sugests. But I can not find a way to destroy Excel process, it still hangs
in the taks manager' Processes as running. I am trying very simple ...

In browsing some of the framework code with reflector, I see a char buffer
being pinned to be passed to native code. A byte array however is not. Does a
byte array need to be pinned before being passed to native code?
System.Web.Hosting.IsapiWorkerRequestInProc ...

Here is a code fragment from some C++ code:
Header File 1 declaration (this is supplied by a third party vendor:
class User;
DLL_API User* pickUser( Global* g,  User** users, int numUsers );

I'm trying to register a .NET DLL with COM interoperability. When I
execute regasm to register, it seems to work all good but at the end of
process throws the following error (in spanish):
"Error de RegAsm: Error al guardar la biblioteca de tipos exportada:

I have the following simple Architecture:
Server in CSharp    <===>    COM DLL (Apartment threading)   <====>  
DB
When I start the server I need to load several COM objects from the DB.

we have a software architecture that allows extension via providing COM dlls
with specific interfaces implemented. Although we switch the code to .NET,
we need to handle old and new COM dlls that extend our product. Part of the
initialization of such extensions is the ...

I am calling a c# class library from vb6 that performs some simple
instrumentation calls, for example:
(namespace is WMIWrapper)
public void SendToWMI(string message)

Hello, I am trying to call GetTextOut from C#, and am having problems.  When the code below runs, only the first character is drawn, and I eventually get a stack exception:
ArrayList oWidths = _getCharSpacing( p_hDC, sOutput, p_iMaxWidth, bIsMulti );
IntPtr hPtr = Marshal ...

I have been working with a third party COM component for a couple years
now, and have been integrating our .NET website,
We recently upgraded the version of the third party application, and
now when I run my code, I get:

I'm creating a CCW for a .Net 1.1 DLL. regasm, however, is outputing the
wrong RuntimeVersion of v1.0.3705 - rather than v1.1.4322 which it should be.
This means I'm having to put <supportedRuntime version="v1.1.4322"/> in an
application config file to get the DLL to run correctly.

My C++ isn't so good, so excuse the terminology mixups.
I have a C# COM application.  Following examples and documentation, I
can get the application so that it's callable from C++ if I embed
something like this in my C++ program:

I have an ASP.NET (1.1) webpage that has a reference to a VB 6 COM DLL
(SMS_AR.DLL).  That part works.  However, the COM DLL has a reference to a
VB.NET 2003 DLL (SMS_PCC.DLL).  
In my project References folder, I see Interop.ADODB and Interop.SMS_AR.  I

I am having C# dll supplying services to C# applications.
I want to use this C# dll also from unmanaged VC++ dll but I do not want to
convert the C# dll to strongly name and COM. Do I have any way of doing so,
maybe using another VC++ mixed mode dll that the VC++ unmannged dll will ...

is it possible to create buffer in managed memory and to pass a pointer
to it to the unmanged code? Is it possible to do it as a field in the
structure?
I have a following idea. Managed code is doing a callback to the managed