hello everyone, I have a COM server running. To communicate with that server I have to run a windows forms application with the MTAThread attribute. To communicate with that server I have to run a COM object with ???? My COM object is a taskbar Deskband. I tried to set the ThreadingModel...more >>

I'm trying to access a C++ .lib from C#. I have a working wrapper DLL (I can get back simple things like int), but I'm having issues dealing with complex data types. For example, the .lib contains this function: int create(int id, int scale, unsigned char *image); In the wrapper DLL I h...more >>

Hi, I have been trying to implement a binary behavior in c#, to display my own custom tag in a WebBrowser control. My behavior is being successfully instantiated (all methods in IBinaryBehavior are being called), however nothing further happens once IHTMLPainter.GetPainterInfo returns. IH...more >>

I am writing a class library in VS .NET 2005 (VB.NET specifically) that will be called from an existing program (that I have no control over) using COM. One of the parameters it expects is the index of an icon embedded in the DLL. The catch is that other than a default icon that seems to be i...more >>

Hi, I have an interop class that works from winforms but not asp.net 2.0 c# app. At runtime I get a nasty 0x0eedfade error just creating the class. I've tried lots of things but nothing helps. Can anyone give me some suggestions? Thanks in advace, Dan ...more >>

I'm trying to create the setup MSI for a PIA. Therefore I've extracted the registry information via regasm /regfile. Surprisingly, I got a whole lot entries HKEY_CLASSES_ROOT\Record with @Class=<.NET Type name> @Assembly=<AssemblyIdentity> @RuntimeVersion=<RuntimeVersion> I don't see a...more >>

I'm developing a .NET class library. I want this to be callable by VB6 (COM / ActiveX) clients. In Project Properties, under Application | Assembly Information, I see an option titled "Make Assembly COM-Visible". How does this differ from "Register for COM Interop" in the Output section of the...more >>

What is the correct c# method declaration for the following c++ method defined in an external DLL? Note, this method allocates its own memory rather than having the caller allocate memory. I can make it work by forcing my managed code to allocate the memory by passing in a StringBuilder b...more >>

I have always used the CreateObject("word.application") to call word automatically from my applications but it doesn't seem to be working with Word 2007. My code is:- Dim WordApp As Object Dim WordDoc As Object Dim WdRead As Boolean = False WordApp = Create...more >>

Hi all, How can I create a visible COM interface? For i.e., I have my interface IUserList : IList , and the the COM class Users : IUserList. Now I want to have IUserList in my COM application, so I can implement it with some other classes (my goal is just to have interface, so I don't have ...more >>

I need to communicate between two applications. The legacy application is in VB6. New development is in C#. Here's the scenario: The VB6 app will be pumping document files into a folder. We'll be writing a new (C#) class for this new feature. The C# Application (as distinct from the file p...more >>

Hi, I am trying to call the Tool Help API ( http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/base/tool_help_functions.asp ) from C# using interop. I have declared: [DllImport("Kernel32.dll")] private static extern IntPtr CreateToolhelp32Snapshot(UI...more >>

Hi all i have created a new c# custom control . if i want to use this control to my VB projects , what are the steps i must do ? can anyone let me know what are the things i must do step by step ? Thanks Senthil ...more >>

A few questions.. Any help would be appreciated.. 1. Is Microsoft.VisualBasic.Collection or VBA.Collection (from msvbvm60.dll) compatible with VB 6 Collections? 2. How would I use VBA.Collection inside c#? If I do this: (assuming Car class is defined elsewhere) public class RunThis ...more >>

Hi everyone... I'm faceing a problem that I want to shae with you and I'm hoping that somebody will give write solution. I wrote a COM dll in Visual C++ 6.0 and MFC that generates some report. I'm using Visual Studio (ver. 2003) to create interop for COM dll cause I want to use in a web pr...more >>

I have a C# DLL which is set as COM Interop, has a GUID set, has an interface with a GUID set, the interface is set as the default, and has a strong name key associated... all the things that mean it will work correctly with VB6. (Including registering using "regasm <dllname> /codebase") ...more >>

We are writing an Excel Add-In in C# that is a combination of our custom Excel functions and dialogs to support those functions which connect and retrieve data from our back end database. We need: 1) The functions to be usable as worksheet functions 2) A double click on a cell with one of our f...more >>

I'm programming Excel from VB.NET, so maybe I don't know how to express my problem correctly. Forgive me. I need to programmatically update links in cells that refer to workbooks on a network share. However, the share in the update does not yet exist. I can successfully update a link howeve...more >>

Hello all.. will appreciate all the help I can get here.... thanks in advance. I am using one C++ COM dll under interop in C#. Since this lib is not supposed to be run in C# I really have no venue for support. And I have no control on the C++ dll side. This is the C++ function protype I d...more >>

Hi everyone.. I need to create a control and a separate class for a VB6 app. using C# 2005. I need to use some textboxes, buttons and other standard controls in System.Windows.Form. I need to link other C# assemblies not usable for COM (ex. i need to use a separate assemblies to access a d...more >>

Are there legal issues with using tlbimp to generate COM wrappers for third-party redistributable (free or licensed) COM objects as part of a commercial application? Also, is it legal to strong-name sign them with a local key pair to enable putting them in the GAC? Some training material seems t...more >>

Using C#, I've created a simple wrapper class for using Excel. I have Office Pro 2003 installed on my devel machine. The wrapper class works great, reading and writing to/from Excel. To do this, I created a reference to "Microsoft Excel 11.0 Object Library", and have a "using Excel;" dire...more >>

Hi. My apologies if this question is trivial, I couldn't find the answers on MDSN and it's the first time I've worked with input/output strings across explicit P/Invoke. My question is about memory management of input/output strings using explicit P/Invoke. Basically I send a fixed-size ...more >>

Hello all, Suppose I am using the browser control in my application to display my own HTML code. Now, suppose I want to show images on the page that I currently have in memory. One way to do this is to write the image to the file system... presumably the temp space... and then grab the IHt...more >>

i am developing a client C# application that utilized a legacy COM object. For development, I cannot use the object because it has specific hardware requirements. Therefore i would like to write a stub or "emulator" for this COM object, preferably i C# but C++ or VB.NET would work too. The i...more >>

I am using the visual studio express 2005's setting of "register com interop". does the proper job of registering my Classslib as useable by native(unmanaged) com consumer? Can any one confirm one way or another? using the com interface from unmanaged application, I don't have any problem...more >>

Hi, What is the right way to deploy servicedcomponent on remote server? Here is what i did and it failed to work - I tested the DCOM with VB component to make sure the communication between two servers worked. 1. created a library project, created a class TestCom inherited from Serviced...more >>

If I create several COM objects in a loop but point to the same variable, do I need to clean up each object or only one at the end. It works both ways but I am not sure if the first method actually cleans up all resources. Here is what I mean (to be more specific, the COMObject is a Mappoint Lo...more >>

Hi!, I have a rare problem. I developed a DLL in C# that i'm using in a vb6 proyect. The problem is that if I instance a class using New works fine. But if I use createobject, VB tell me "Active can't create object"'. And I need use this dll in ASP, so, I must use createobject... Set Actio...more >>

Hi. I have developed a very basic .NET 2.0 CCW for use from Excel. My dev box has both 2.0 and 1.1 installed. MSDN docs tell me Excel will use the latest ..NET version by default, but using fuslogvw.exe I can confirm that Excel is in fact attempting to run my component using .NET 1.1. How ...more >>

Hi, I have to handle unmanaged callback functions in my C# code. I am doing it using delegates. I get the callback from the unmanaged code correctly with valid data, but as soon as my managed (C#) callback handling method returns, the app crashes. I suspected that this could be due to garbage...more >>

I set up my mom's login, installed her programs and games, created folders, cleaned up and neatened the folder's and icon's appearances, and organized the desktop. Dad's login is going to be 95% similar. Is there anyway to copy all those settings to his login without having to repeat myself? T...more >>

Hey All, I have a VS2003, C# addin for MS Word 2003. When the windows form unloads, the screen flashes. I've never seen this behavior before. Usually, the unloading of a form is very smooth. I was wondering if anyone else has experienced this and, if so, if you were able to resolve it...more >>

I've posted an update to the HtmlEditor - hosts Msthml in C#. I've removed the dependency on Microsoft.mshtml. See here: http://www.itwriting.com/htmleditor It would be nice to be able to use the DOM in System.Windows.Forms with the control. You can easily get the unmanaged DomDocument fro...more >>

Hello, I'm accessing a COM object from C#. The COM object is running in a separate process. From C# I can QI for IY, but any method on IY that I try to call fails with InteropServices.COMException. The error states that the method returned E_FAIL. I have attached in a separate debugge...more >>

Hi, I am trying to P/Invoke a DLL containing C-API having a C-function pointer as callback. I tried to write my P/Invoke (see below) but when I run the application, I get an exception when the "myCallback" method should be called. The exception has the following message: Attempted to rea...more >>

Using Visual Studio 2005 with WinFx CTP february added to it. Adding a reference to a dll file (type library). When using OleView/File/View TypeLib I get something like: : [ odl, uuid(some guid), helpstring("IEnumEntity Interface"), hidden, custom(some other guid, committed) ...more >>

Hi everybody, I using VS.NET 2005 Pro to develop win form application and I need include an activex control to show information, this works good In developing time but after deploy doesn't work it, I try to running in a clean machine with framework 2.0 installed I found this error 'Unabl...more >>

Hi, If a dot net app calls unmanaged code can that unmanaged code corrupt the dot net app. I'm thinking about a lang using pointers. If yes, are there any good debugging techniques to catch this? Thanx jra...more >>

I'm facing a problem where I'm trying to use a new .NET app to access some old VB6 ActiveX exes. The ActiveX exes implement a (base) COM dll and use an exposed method from that COM dll to do some work. Here is what I got from the OLE viewer pcIEBase has a public function Export interface _cls...more >>

hi. we are having problems with hung processes on a production box onto which i cannot install any 3rd paty software (e.g. sysinternals). the hung process will be one of many scheduled tasks all executing as svchost. i would like to find out which of these tasks is hanging without stopping the...more >>

Im having some problems getting my .net assembly to work correctly through a CCW. In the initial release I did not have to use remoting and it was very simple to get it working under VB6. Now I must use remoting to access a data provider and Im seeing weird things happen. I developed and te...more >>

Hello All, I have both VS2003 & VS2005 installed. I am trying to edit an MS Word AddIn built in VS2003. I have added the winword.exe.config file which allows the addin to launch MS Word without crashing when running inside of VS2003. However, my code isn't being hit. I have put breakpoi...more >>

Can someone tell me how to create an Excel Application object in C#? I can create a Word and PowerPoint Application object, but when I try to create one for Excel, I get the build error: "Cannot create an instance of the abstract class or interface 'interface'" After adding the appropriat...more >>

Hey All, I have a Word 2003 addin that was created under VS2003. I recently installed VS2005 on my machine. When I try to run the addin inside of VS2003, it just launches Word and crashes it. I've seen some articles about creating .config files containing the following: <configura...more >>

Hello there, I've implemented a simple .NET component exposed to COM (through CCW I guess) the point is that exactly the same code compiled using 1.1 Framework works perfect with Excel VBA, while recompiled on 2.0 Framework causes "File or assembly name <xxx>, or one of its dependencies, wa...more >>

Hello, this my problem: I have a struc, but i would like to know how can i do to convert it in byte. This is my code: [DllImport("winspool.drv", EntryPoint = "AddMonitor")] public static extern int AddMonitorA(string pName, int Level, ref byte pMonitors); [StructLayout(Layout...more >>

my webservice is using a WIN32 DLL which has a function within a Class. i am putting in the DLL IMPORT and specifying the entrypoint in the webservice.. however the Webservice always seems to NOT receive the value from the WIN32 DLL function. i realised it might be because of the fact tha...more >>

Hi! I'm using a Strong Name Key to create our assemblies, this key has the Full Trust security so we can use those "mini tools" from network drives... I'm trying to use WMI to get access to data in our SMS Server... Now, when I tried to create my assembly I got this message... "Unable ...more >>

Anyone know of a way to pass the Addressof <methodname> value in an Object array to ConstructorInfo.Invoke or Activator.CreateInstance as a parameter? Such as: Dim info As ConstructorInfo = ObjType.GetType().GetConstructors()(0) Dim params() As Object ReDim params(0) params(0) = Addressof...more >>