I am having difficulty figuring out which datatypes to use for return values
in a particular DLL import function (C#).
I am trying to use the CryptGetKeyParam function from the ADVAPI32.dll API
call to return certificate information.  I am able to successfully call

I've made a simple .NET .dll assembly which I deployed to another computer
through a Setup-project (.msi-file). I opened Visual Studio Basic 6.0 and
referenced the assembly. When I run the program it gives me: "Runtime Error
429 ActiveX Component can't Create Object". Doesn't the ...

I'm hoping someone can help here.
In C++, if you create a com object in a thread running as an STA, &
then want to use it on another thread running either as an STA or MTA,
then the interface needs to be explicitly marshalled using, for

Answering my question may require some familiarity with printer
drivers in addition to interop. I'm trying to implement some interop
code between a C# application and our UniDriver printer driver. I'm
having two problems really:

If you have something like this:
Byte myArray[] = new Byte[someSize];
And you pass that to a Win32 function using P/Invoke, is it possible to then
cast that array to the "real" unmanged type that is contained within that

I am makeing an app which uses WTS API function.
I have done most of it, except a little part where I should marshal a
structure from pointer.
I have found some code in newsgroups, but it is in C# and I use VB .NET.

Is there any way to 'scrape' the ascii text from an
AxSHDocView:AxWebBrowser control?
IOW, I'd like to get the text as it is displayed by the browser.
Somewhat like selecting all text in IE and doing a capture to

I am trying to port a C stucture with union 's inside to VB.NET.
I know there is no UNION keyword in VB.NEt, but how can i solve this in
VB.NEt ?
kind regards

What would be the analogous c++ statement for this C# code
ComInterface ci = (ComInterfaceClass)Marshal.CreateWrapperOfType(
GenericType, typeof(ComInterfaceClass));
or

Simple question on memory allocation.
I have a "Unmanaged" Client DLL that I'm creating a Managed wrapper to be
used in Visual Basic .Net and C#..
Current in on the client side of the application, There are points where I

I have a very custom case where a typelib relies on another typelib that does
not have a PIA.  We want to make our interop for our typelib a PIA.  We
cannot change our typelib at all (interfaces are cemented), so the decision
was to modify the interop assembly created from our ...

I use some of Windows Terminal Services APIs in my app.
The is an API function which enumerates sessions on a terminal server.
It uses a pointer from another API function to know on which exactly server
to operate.

I'm trying to implement calls to an existing C-based DLL within a C# program.  It sounds straightforward enough, but any calls to the extern functions produce a NullReferenceException.
My code looks like this:
[DllImport( @"e:\jbhexe\sscam.dll", EntryPoint="BAM_calcs" )]
public ...

As I understood, when returning System.String with interop, .NET tries
to delete it with CoTaskMemFree(). But, this char* points to permanent
part of memory, and should not be deleted. Is it possible to disable
this behaviour (with some marshal attribute maybe)? I know I can return

I have a native, C++ console app that uses ~26MB of RAM when it runs.
It uses quite a lot of RAM to make some math but will never xceed 26MB.
Now I've  made a dll out of this code and use it with DllImport in a C#
console application.