I am trying to import a dll from within a webservice. At the call of the dll function, a DllNotFoundException exception is thrown. I have tried to putting the dll in the web service directory, putting the dll in the system32 directory, specifying the full path for the DllImport ...

I working on a very simple prototype to intercept file system change
messages on my Pocket PC.
When I use the SHGetSpecialFolderLocation function, I get a
MissingMethodException.

A number of folks have asked me about the naming convention used for the
CryptoAPI  unique keycontainer files (Microsoft CSP keycontainer files).
These are encrypted (via DPAPI in W2k+) files holding RSA or DSA keypairs
and managed by the CSPs.

I need to read the entire eventlog and parse it. The application uses vb.net and the EventLog object. The problem i'm having is that it can take less then a second up to 15 seconds to read all entries in the  eventlog. I used Perfmon and found the following two counters that were ...

I am trying to call the WTSSetUserConfig function from VB.Net but it does not seem to work. I always get the error: "The user does not exist". But when I am using the function WTSQueryUserConfig to get the information i works ok.
My code is as follows
Const ...

There appears to be a problem with marshalling a specific usage of a
System.Drawing.Color reference parameter from an unmanaged caller.
I have a .NET control exposing an interface as (managed C++):
public __gc __interface IManagedUIElement

I'm trying to send an array from a MFC COM client to a .NET assembly. It works fine with non-array data and with strings, but I get an error message "No such interface supported" when sending an array.
Here is the C# code:
namespace SpecTest
{

I am trying to access a managed com object created in VC6.  I have created a ASP.Net form and have added a COM Reference to the project.  This creates a interop.xxx.dll for the project.  When I run the form I recieve an exception: InvalidCastException: QueryInterface for ...

We are trying to access a remote COM object in our asp.net application and are running into difficulties. We keep receiving the error: QueryInterface for interface "dll.className" failed. This error occurred when we deployed the application to our test servers. During our ...

two questions,
1. how to debug trace into the com componet developed using vc++ 6? I had the enable unmanaged debugging set to true in c# project
2. what's the correct way to pass an array of structure into a com method.
below is what I have so far and it is not working

Not sure where to post this Q
I am trying to write a Managed Exchange Server Event Sink (as a class library) in C#
I have been following this tutorial step-by-step
http://www.codeproject.com/csharp/CsManagedEventSinksHooks.as

We're trying to sythetically emit an object on the fly and have it
work via COM Interop (we using scripting in our product).  We can
generate the object just fine and it even kind of works, however I
need the equivalent of these attributes on the object I "Emit" and I

I'm having a strange problem and can't find a solution
anywhere.  I have an ActiveX control that I added to the
toolbox.  I then added it to the form with no problems and
ran the application.  Everything looked good.  I then

I am trying to send a fax in C# using the XP fax com extended api.
If I specify the body of my message as a multi page .tiff file, it get the
following error:
"System.Runtime.InteropServices.COMWException(0x80070483): Operation

I'm trying to call a third party HexEditor ActiveX control
(http://www.softerra.com/products/hexeditor.php) from within C#.
I can set all the necessary properties from C# but when I want to execute
the SetData method I always run into problems.