I'm using windows messages and the LParam parameter to send chars as ASCII
numbers from VB6 to C#. How can I retrieve the right int value from the
IntPtr in .NET?
My code:

When you register a c# class as  COM object with the Attribute
ComVisible(true), Visual Studio, or in our case the installer program handles
all the registry entries.
One entry made be the installer is the default value underneath the Class

I've tried several approaches for a few days now & feel its time to
ask the gurus.
I am making a call to a C++ dll from C# via p/invoke, the api expects
an array of structs with pre-allocated buffers. The api populates the

I have a C++ DLL that accepts BSTR* and changes its value before
returning. I am calling this API from C#.
I get changed value in Object[] but not in actual variable. Please see
my code snippet to understand.

It's very strange to have such problem when i want to write an excel
using C#.
The program is developed in XP sp2 (english), .NET framework 2.0,
Office

I'm programming an C# application which uses Automation. The problem is
when I quit the application a ghost of excel is always running (Can be
seen in all processes with th task manager). What is the solution ?
Thanks

"The CLR has been unable to transition from COM context 0x1b78c0 to COM context 0x1b7a30 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows ...

We are trying to implement COM inside our .NET c# application, that
needs to be called from a C++ app.
While we can get the properties and methods to work just fine, the C++
client has an issue with the events.

I have some existing unmanaged MFC/C++ application in VS2005 and VS2003.
I need to modify these apps to call methods already implemented in an
existing C# class library/assembly (retrofit some new functionality) and
redeploy the application.

Say I have an interface from IUnknown::QueryInterface that I want
available in my .Net program. When QueryInterface returns, I am
responsible for Release()ing it, but depending on whether
GetTypedObjcetForIUnknown has already wrapped that object, it may or may

This is part of my assembly:
[assembly: ComVisible(true)]
[assembly: ClassInterfaceAttribute(ClassInterfaceType.None)]
// The following GUID is for the ID of the typelib if this project is

I have a legacy COM application that has PIA's for it's DLL's that are
registered in the GAC. In VS 2003, I would add a reference to my project by
browsing to the DLL file in the install directory of my legacy app, and it
would automatically refer to the version in the GAC (this ...

I want to marshal the following C++ struct to a managed callback
function:
struct CALLBACK_DATA
{

I am writing a C# application to generate a PowerBuilder PBL library.
This is done by making calls to "ORCA", a vendor-provided pborc100.dll
(which was written in C or C++.)
I have successfully called pborc100 to open and close a session, and

I try to create a COM Dll in C# 2005 Express that implement a COM
interface (Wealth-Lab real time data adapter API).
I succeeded in creating a dll for the Wealth-Lab COM interface to
implement.