I am invoking waveOutPrepareHeader in Vista x64.
I am getting the following error:
"An invalid parameter was passed to a system function."
Here is the code:

Here is my problem:
log4net works fine with my Client (Windows Application .Net 1.1)
but does not log any thing when i use it in my server (Com+  DLLs).
Does any one know why or how to make it work.

Rather than p/Invoke, is there not an easier way to Interop to Office
products in C# such that I don't have to worry about what version the user
is running?   In VB it's merely using late binding (Createobject, etc).  I
don't want to include a reference to VB in my C# program and ...

I would like to attach to all running excel applications.
I tried
System.Runtime.InteropServices.Marshal.GetActiveObject()
you get an excel application but you can not specify which one, so this

I am certainly not an expert to C# and COM/Marshal.
I cannot manage how to handle this problem:
I want to call the following COM function from a C# Programm:
IDL Description: (Simplified)

I have a third-party DLL (unmanaged) for which I am trying to call a
function. The function requires a structure (as an argument) which
utilized several variables I am unable to translate.
The original C header structures contain (amongst other things that I

I'm doing a IO Control function call to set a I2C device's frequency as the
first part of a sequence of other IO calls.  I'm getting an access violation
in unmanged code in passing PBYTE pBufIn in the function below's signature.  
I've included a description of the comments for ...

One of our enterprise applications must have a reference to a tlb file that
exposes methods from a COM component residing on our local network.
Not all the users of that application will have to use the functionality of
that COM component, thus, it will be no necessary to load ...

I have an OCX i would like to use in .NET 3 with WPF.
I use aximp to create the wrapper. unfortunatly, this creates a
Winform 2.0 dependency.
I don't want to mix .NET 2 and .NET 3 together....

I would greatly appreciate anyone that can help me with the proper way to
declare this interface?
Here is the C++ declaration:
interface IASIO : public IUnknown

While developing a .NET module that uses COM to communicate with the
main application, I have seen this strange error.
I have a class that I expose to COM (BookAndPlanFormSupport) this class
implements two interfaces that are also exposed to COM

I am trying to raise a user-defined Event in a VB.NET 2005 COM Class
(sub)form and have my calling VB6 form handle it.
Code samples follow. In the VS 2005 code two events are coded identically -
when they are RAISEd in reaction to a Framework Event they WORK, but when

I am using the Microsoft Caching Block with the database as a backend
store, and all works fine under .NET. I am trying to get the same code
to work when my assembly is called via COM Interop from a VB6 client.
When this happens, the caching block falls over because a call to

Hi all! I'm getting this message again. I have the <system.windows.forms
jitDebugging="true" /> in my config file and it seems like this is not
happening while attached to the VB6 client application and debugging.
However, while not attached to the VB6 client I am getting this ...

I'm writing a .NET application for monitoring print queues. I can get a
handle to a printer by OpenPrinter. I can easily run
FindFirstPrinterChangeNotification (but only with IntPtr.Zero as
pPrinterNotifyOptions argument) and wait for the printer event. Finally I