Hi. I'm writing a C# front end to replace a spreadsheet/vba front end to our
legacy dcom server written in C++. I'm just learning .NET (learn by doing,
they say) and I don't really know any COM, so apologies if the answers are
obvious.

Hi,
I'm using following bridge architecture to connect
native 32-bit applications with .NET
32-bit => COMServer.exe => .NET.dll => .NET Destination apps

Platform: VB.Net 1.1
I am trying to pass a string in VB.Net to a C Dll method which accepts a
BSTR. I get a nullreference exception whenever I call the API.
The following VBA declaration works fine in my previous Application:

This may go along with my previous post but here goes:
I've done the following:
   Created an assembly with a class that is exposed to COM
   Signed the assembly

I want to build an Excel Worksheet from a VS2005 program.  I have downloaded
a C# sample program from Microsoft called AutoExcel.  It builds OK, but when
I try to run it, I get an error at this line:
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);

I have some doubts about the using of PInvoke to import dll functions.
Let's see
I have a function which returns a pinter to a structure to open a network
adapter

I have a class assembly that I have made visible via com. I've strong named
it, put it in the GAC, and registered it with RegAsm, and have successfully
called it from ASP and a VBScript file. I then incremented the version # of
the assembly and made a slight code change. The ASP ...

I have a Web application written in C#  which makes use of our
underlying COM components. The application when hosted on Windows 2003,
hangs frequently when used under heavy load.
The hang dump(AD+)  taken for the w3wp.exe process shows our COM

Will defining Your own interface in a .NET library and marking it as
[ClassInterface(ClassInterfaceType.None)] allow the COM Client to call the
.NET CCW using early(V-Table) binding?
Thanks,

Has anyone successfully create/read internet shortcut files (*.url) from .NET?
When I create an object for CLSID_InternetShortcut
{FBF23B40-E3F0-101B-8488-00AA003E56F8}, I can cast it to IPersistFile, but I
can't cast to IUniformResourceLocatorW

   We are trying to implement a keyboard hooker for IE using C#. For
this we are trying to install a global message hook using
SetWindowsHookEx function:
       mHook=SetWindowsHookEx(WH_KEYBOARD_LL,new

I'm running into a problem with relatively long fields (this one is
1351 chars long) where it's failing on the copyFromRecordset(rs) call.
The exception I'm getting is:
An unhandled exception of type

I have a client who requires IE to print HTML files.  The automation is
complete using the above, but now they want to be able to switch printers
(not print to the windows default priter, but to a printer specific to a
document)

I'm having a little trouble deploying a .NET DLL, and I was wondering
if anyone here could help.
Basically, I've built a DLL to expose some .NET components to COM.
After building the DLL and running "regasm /tlb" and "gacutil", I can

I have a need to create a dotnet class assembly that will be registered as a
COM object and called by an ASP page. I've been searching the web, but
haven't come across anything great or not to far above my head at this point
on accomplishing the above.