I am developing a .NET serviced component using EnterpriseServices (in C#). It interacts with some COM objects, and implements some interfaces defined in COM code (C++). I am adding role-based security to the .NET serviced component. What I'd like to do is restrict access at the interface le...more >>

Hello everyone, I have developed a COM component using C++. And I need to invoke some functions in another DLL which is implemented in C#. I am wondering whether there are any tutorials or samples of how to do this correctly and safely? I have this question because I noticed that the d...more >>

Hi Guys, I need some help on the topic. I am trying to access a com+ object located in a physical machine (let's say machine A). In another physical machine (machine B), I have a web application running on IIS that will access the com+ object in machine A. CreateObject() procedure is called...more >>

Hi All, I have a .Net Assembly that is COM enabled (COM-Interop) and so is instantiated and used in vbscript and jscript. I install it into the GAC (during our installation program). This assembly has dependencies on other ..net assemblies (from another companion product) to run. These d...more >>

hello, I have created an interop assembly in C#. But I couldn't find any way to export helpstrings to the generated typelib for this assembly. Which ways have I to do this? Thanks for your time and any suggestions. Best regards Detlev...more >>

Hello, Need some help: I want to call a managed dll (C# code) from a C++ module. Is there a kind of a 'Reverse-P/Invoke'? How / what to do? Thanks. victor....more >>

Hi, I have been using Reg-Free COM to load a .NET assembly using a CPP client using manifest files. Recently I deployed my .NET assembly, and the loading of my .NET assembly was leading to heap corruption and eventually the crashing my application. I was able to develop a sample project that...more >>

Hi NG, I'm encountering a strange problem with a reference to an activex-tlb from my C#-VS2005-project. Sometimes when I try to build the project I get build-errors like "Type or namespace xxx not found..." where xxx is a namespace within the tlb. The reference-symbol in the solution- explore...more >>

I have modified my project from the previous post and am not using exclusively the COM callable wrapper (CCW)... I have C++ code calling into .Net 1.1 code via the CCW. There is on call that launches a Managed modeless dialog. Right now the dialog starts to draw the frame but that is it. Th...more >>

OK, I used to think I understood what RegAsm was for: if you are exposing a .NET assembly to COM, you RegAsm the assembly to add all of the necessary COM entries to the registry so that the COM runtime can instantiate your ComVisible .NET classes - I thought that was the *one and only* scenario ...more >>

Hi, I have an interface that uses generics in its methods: [ComVisible(false)] public interface IGenericProperty { bool GetProperty<T>(string propName, out T value); } I have marked it [ComVisible(false)] because COM can't handle generics. However the class th...more >>

Hello, I'm new to COM development. Here's what I want to do: In unmanaged C++: 1) Create an interface called ITeam 2) Create another interface called IPerson 3) Create a method in ITeam called GetTeamMembers. this will return an array of IPerson's. In unmanaged C# or VB.NET: I want ...more >>

Is that really true that in an in-proc C# assembly the Finalize methods are not called when COM objects are destroyed from the caller? And if so, is there any solution for this problem? Or the only one is to define a "Cleanup()" method and tell all users to call it and hope they will? I'm usi...more >>

Hi, (.Net 2.0) an AX-DLL written in VB6 is imported by tlbimp. VB6 code: Public Type SAKomplexRecord .... End Type Public Type SAKomplex Records() As SAKomplexRecord End Type IDL: (from original VB6 DLL) typedef [uuid(.....), version(1.0)] ...more >>

Hi I'm using macromedia flash.ocx version 8.0 I'm developing windows application with c# Sometimes "Attempted to read or write protected memory. This is often an indication that other memory has been corrupted" exception occurs in my application. I think com component cause this I don't wa...more >>

Hello, I've got a little problem. I used to develop a component with Visual Studio .NET 2003 (.NET framework 1.1), and registering this assembly to COM interop with a function only writing keys in the registry (regedit). This way, I was able to include my activeX component in a former Visu...more >>

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Hi everybody! I have created an automation add-in in C# using VSTO. When I build, I can go in Excel, outils, add-in and add the add-in wich appears in the list. When I make an install of my add-in in another computer, it doesn't work. Why? Help me please, Thank you,...more >>

Hi, I am using a COM component which provides a function like GetBitmapData(out BYTE* pData, out long *pLen), in which it allocates the memory using "new" and returns the pointer and length of memory block. i am calling this functon in C# in following way... int pImageBuffer = 0; int len ...more >>

Is it possible to invoke a .net 2.0 dll (built using VS2005) from a .net 1.1 exe built using vs2003? Thanks ...more >>

Hi! We have a smart-client WinForms app that uses DSOFramer to embed MS Word as a panel of our app. We want to create a few commands that are specific to our app that act on the Word document. The two most logical approaches for that are: (1) Add a menu to the menubar for all our commands...more >>

Hello, I have to make a DDE-Connection from dot.net (as a Client). The DDE-Implementation from Brian Gideon (http://www.ozemail.com.au/ ~markhurd/vbnetdde.zip) works, but I still need a function to list all avaiable DDE- applications. I found this example in C: http://msdn2.microsoft.com/...more >>

I've been noticing a memory leak with the following sample code snippet. Can someone please advise. Have a C# Winforms app with the following code on a button-click event. private void button1_Click(object sender, System.EventArgs e) { IntPtr p1 = new IntPtr(-1); string inputStr; Allo...more >>

Hi All, I am working with clipboard. It stores data pointed to by using a void pointer. I have a managed object of a complext structrue containing native data (e.g. int, long) as well as objects of my own class and arrays of objects, pointers to objects etc. How to marshal that structure to...more >>

Hello, I need to create a DCOM server in C# with a friend, to be accessible for a client application with embedded VBS. We started with a "Hello world" article at http://blogs.msdn.com/adioltean/archive/2004/06/18/159479.aspx but, unfortunately, it seems to work only partially for us, even ...more >>

I've just started looking into fixed sized buffers in C# 2, and I think I must be missing something. I have no problems when not dealing with interop, but as soon as I start using interop things go wrong. I thought I'd try GetTimeZoneInformation as a starting point, partly as I know I can get ...more >>

I use the ReadClassStg API call to find out what application owns a given storage. In my test case it is Word. //4) Determine the CLSID of the COM object that owns the IStorage. Guid clsid = new Guid(); ReadClassStg(storage, ref clsid); I then create a instance of Word as follows: //5)...more >>

Hello, I found a post in January 2006 by "Scott" titled "Reg-free COM problem". He describes that RegFree COM doesn't work for a component written in VB6 that uses publicNotCreateable classes. I have exactly the same problem : I have created a VB6 testproject with a global multiuse class ...more >>

Hi, I am trying to call VB.NET DLL from withing the VC++ project. It is failing. Pls let me know how I can do it. Thanks Bhanu ...more >>

Hi folks, I can not compile my first C# Interop program without Visual Studio: step 1: I downloaded tha PIA, and verified the assemblies in GAC in my machine. step 2: I created a simple C# console program with one line like using Microsoft.Office.Interop.Excel; ste...more >>

Hi , I am trying to reference a COM dll ( x.dll) from my C# code. I have to do this programatically at runtime and access its functions. ( Not through Project-->Add Reference->COM-------etc that we do through visual studio). Can anyone help me , how i can do this. Regards Kris ...more >>

Hi, I have following strange problem. I run remote object using .NET remoting. This remoting object creates some COM object (STA) and executes some methods. The strange behavior is that if I print GetCurrentThreadId inside remote object I see that each call run in different thread id, but p...more >>

I have a problem using .NET assemblies by their COM interface from VBA. Everything works well on my machine, but on a different PC I allways get the error message: "Automation error. The system cannot find the file specified." Creating the .NET component in VBA fails when it has been built with...more >>

OK My vb.net (.Net 2.0) code crashes when I update a vb6 dll. I’m using interop com to communicate to the vb6 dll. So to start with all is well as in the .Net app is working just fine with the vb6 dll. But then I update the vb6 dll and the my app crashes. Update method. First I regsvr32...more >>

Hi Everybody! I just installed .Net 3 Framework on my computer and created new Windows Application (WPF) in visual studio 2005 sp1. Then tried to find WebBrowser control in Toolbox but couldn't locate it. I tried to add manually shdocvw.dll and tried other ways but I just can't find a way t...more >>