I have a .NET Windows Service app that instantiates a COM
component.  The service instantiates the COM object on my
developer PC but does not work when deployed to the
production server that has .NET Framework.  The error

How do I convert a Win32 hbrush to a .Net brush object?
A lot of the .Net objects have things like FromHfont and FromHRgn but i
can't find the equivalent for a brush...
Many thanks,

I have to invoke a function defined in a c dll from a c# program, but I
don't know the dll name at compile time.
How do I declare and invoke this function using LoadLibrary and
GetProcAddress (GetProcAddress  returns a function pointer!) ?

I'm trying to use the Excel 5.0 Type Library in C#
I've managed to create an Excel Instance using
Excel._ExcelApplicationClass xl = new Excel._ExcelApplicationClass();
But now I don't know how to go on, opening an template writing into it and

I have a COM object implemented in ATL. The CoClass implements two
interface. The default interface IInterface1 is a dispatch interface. The
non-default interface IInterface2 is an IUnknown interface.
Using dotnet interop I can create object instances, I can also be able to

I'm having trouble porting ASP-script to VB.NET with respect to Excel
COM-interop:
The following statement generates an Error:
Dim qt As New Excel.QueryTable

I have a legacy application that I need to write plugins for.  The plugin
must be written in C++ using a standard DLL that exports functions.  What I
want to do is create a proxy plugin that will call into a .Net assembly.  Is
this something that can be done easily?

I created a Deployment Solution for my COM object using VS.NET.
When I install the object on another machine and set a reference to the
object, I can see all properties, events, etc.
When I run the application, when it goes to instantiate the COM object I get

I has a routine which is writen in VB.Net to open an excel workbook, update
it, save it and close it.
I am performing all the necessary steps to destroy a reference to excel,
including "ReleaseComObject" etc.

Is there a way of discovering the reference count of a COM object.
e,g. an Excel workbook.  ReleaseComObject(xx) decrease the reference count,
but how do I detect if I have missed any references, thus not closing Excel.
Tim

There some problems with creating object our COM server
application. Application works fine, if we use VB6 ( or
any old tool supported automation ) for creating client
application, but the same code failed in vb.net with very

How do i convert the following structure declaration from c++ to c#?
#pragma pack(push,1) //Byte alignment
struct TtsrPlayerInfo
{

I use an old C API DLL with a function, that returns a
structure like this:
struct err_struct
{

I have a requirement for my app to cascade all the windows on the desktop.
These aren't MDI children, but any old app running within Windows. I can't
figure out though which API call to use, nor can I find anything in the .NET
framework to help me out with this.

I want to pass a 2dim Array of Double to a COM Class done with vb.net. If I
declare Sub setData(InData()() as Double) it does not work (I think the type
mappimg can't be done). So I want to get a Variant by Sub setData(InData as
Object). If now a vb6 made application calls this with ...