Hello group,
I'm trying to expose functions contained in a dll to COM, so I can use
it for example in Excel VBA (that's just one place where I need it). I
have searched the internet, found some articles on it, tried out

I have an Excel 2002 spreadsheet which has a few combo boxes.  The
selections in the combo boxes are used for calculations.  My asp.net
page needs to set the value of the combo box.
I understand I can retrieve the selected value by looking at it's

I have to import data from Excel. I can't add reference to Excel COM  
because that way I will have problems when clients will not have Excel  
installed. So I automate Excel through reflection.
PrepareExcellObjects()

(Running on Windows XP Pro SP2).
Firstly, can someone tell me if there is a memory leak in VS2003 & VS2005
when using COM interop concerning BSTR's not freeing up resources? Our test
app, which uses a COM component to iterate over records and access their

to understand why I want to do this, here is some background:
I am trying to migrate a big application with many forms from VB6 to
.NET. The code is only separated by the form modules; there are no
layers. So the only incremental approach I see, is taking one form at a

I have a legacy com component with no IDispatch in the interface
hierarchy.
The interfaces exposed by this component are not automation compatible.
There are no SAFEARRAYS / VARIANTS  ....no other self describing types

I am having a problem called a .net assembly from an asp page. I go through
the following stages:
I create a module from my vb source
I link a strong name key to it

Howdy,
I've worked through the few threads on this issue in the group archives
but still not quite getting where i need to be.  Other than whacking
around some MUD code a few years ago, this is my first time with C++.

I have this application in which I am using webbrowser control and
mshtml. I have developed this using Microsoft Visual Studio dot net
2005. Now the application works perfectly in my system and also in all
the systems which have Visual Studio dot net 2003/2005.

I have been playing with some interop over the last copule of days and
have a small problem. I am trying to use DeviceIOControl to talk to a
custom driver. I have successfull called CreateFile and have used
DeviceIOControl to initialise the device. The problem I have is when i

 I m using waveOutOpen() in C#.net code.I got the exception " Can not marshal parameter #3: The type definition of this type has no layout information." i m passing an object of a class WAVEFORMATEX that i hav written as parameter #3. I saw some other codes, where such parameter ...

I am developing a dll in VB.Net for use in a COM application.  Part of the
functionality of the dll is to open a modeless form within the COM app.  On
the form is a button that runs a process.  If the process throws an error it
opens a messagebox describing the error.  

I created a test assembly in VS2005 VB.Net to be made into a CCW.  I did the
following:
1) checked "Make assembly COM-Visible" in assembly information
2) Signed the assembly with a strong name

I'm trying to use libusb-win32 (http://libusb-win32.sourceforge.net/)
via #libusb (http://www.icsharpcode.net/opensource/sharpusblib/) with
.NET 2.0 on Windows XP SP2.  I keep getting an exception from a
function, usb_get_busses().  It works the first time I call it, but

I am trying to implement an asynchronous COM interface in managed C++.
I am having trouble with the implementation ICallFactory.  When
ICallFactory::CreateCall is invoked I am passed the object reference
which should be the controlling unknown of my call object.