Hi all, i'm trying to use COM Interop to return an array of c# structures to Native code. I tried to marshall the Array as SAFEARRAY. The structure: [StructLayout(LayoutKind.Sequential)] [ComVisible(true)] public struct teststruct{ [MarshalAs(UnmanagedType.LPStr)] public string...more >>

Hello, I am trying to call an API Function (API is written in C Language). On a particular function I am getting an exception "AccessViolationException was unhandled by user... Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Can ...more >>

I have a .Net 1.1 assembly that is being exposed/packaged as a COM object. Interally there is a class "Dog" that to the outside world I want them to see "Cat". Back in the world of unmanaged C++ this is easy to do, simply change the name in the idl file from Dog to Cat and change any reference...more >>

ATTN: COM Experts I have been getting this error message and have post a few times but still don't have any answers and I can't find any on the www. *** Message: The callee (server [not server application]) is not available and disappeared; all connections are invalid. The call may have e...more >>

Hello all. 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: using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; using System...more >>

I'm using a CodeProject project in my application that shows how to embed an editible IE control into a .NET window, and control it in various ways. (I'm using it for mail merge.) However, the code requires a reference to the Microsoft.mshtml assembly (a Primary Interpop Assembly, I believe), ...more >>

Hi, I have a Third party DLL which is not signed. I am trying to use that DLL in my Class Library. While time of building i got an error saying "The referenced DLL doesnot have strong name key" I used ILDASM to disassemble the dll. The output containes Sample.IL Sample.res and Sample.Res...more >>

Hello all. I see that Marshal.AllocHGlobal is always returning memory in a 32 bit memory address. Can I be assured that this will always be the case? Thanks. Assaf ...more >>

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 p/Invoke (G...more >>

I've googled until I'm blue in the face - nowhere can I find the solution to this.... Developed my first real app in vb.net 2005. works great on my PC and my laptop (which also has VB.Net 2005 installed on it) The app also installs in my friends new Dell laptop However, on my other PC a...more >>

hi, This is the first time i'm calling win32 functions from C#(i did call MessageBox! though =P) and i think i've done my homework with the memory management , the call however does not succeed , it fails with an error. It fails with error code : 127 (which i cant find in LMErr.h) I prob...more >>

HI All, 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. Thanks in Advance Harish ...more >>

Dear All, I am trying to write a C# DLL that would work with VBA and C++ applications. After registering my DLL with RegAsm (regasm MyDll.dll \t MyDll.tlb) I can use it in VBA. However I can not add a MyDll.dll or MyDll.tlb to VisualStudio 2005. If I am trying to add it in C++ environment t...more >>

Hi I am using Word 2003 interop to read and write into activeX controls that I am using inside Word document. I am accessing those controls from a VB.net application. In some machine I found the application unexpectedy getting closed. As i debugged it I found ... An unhandled exception of ty...more >>

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 the driver funct...more >>

We are programatically generating Excel Charts (2007) and need to embed them into a document. The problem stems that we do not initially know how many charts will be generated, and they all differ in data points. Thus because of the way they are linked we cannot: for each DataSet in All_Data...more >>

Hello, I'm writing a C# application in VS 2005 that needs to open Excel and output charts for various reports. My plan of attack was to record a macro in Excel of the end user creating and formatting the charts the way they want, and then include the code from the macro in my C# project. I a...more >>

Hi, 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) interface IaIf : IDispatch { ..=2E. [id(20), helpstring("")] HRESULT getSomething([in] int numRo...more >>

Hello, 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 alway...more >>

Hi 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.... What can i do ? Thanks Jonathan ...more >>