Hello Do anybody knows a method to call a dll function from .NET using address from GetProcAddress, imported by [DllImport("kernel32.lib")] without creating a new dynamic assembly and emitting code? The task is using multiple dll's with fixed exported functions (as plugins) in .NET, so i have...more >>

Why can't I use this class in VB6 with data? I can't Redim it, etc. You will see that I have an array of class Y as ITEM() in class X. <ClassInterface(ClassInterfaceType.AutoDual)> _ Public Class X Public ITEM() As Y End Class <ClassInterface(ClassInterfaceType.AutoDual)> _ Public Cl...more >>

Hi Everyone! MIDL compiler is very effective in getting IDL files compiled into TBL files which further can be used for generetion of interoperation assemblies with TLBIMP tool. Unfortunately I got stuck when MIDLing some idl files supplied with Platform SDK - UrlHist.idl and Urlmon.idl. I got...more >>

have a C++ application that declares an Automation method using the following signature: DISP_FUNCTION(apauto, "DMIToSectionComponent", DMIToSectionComponent, VT_BOOL, VTS_I4 VTS_UNKNOWN) I would assume that I can use the following method signature to pass an object into my C++ code ...more >>

I created a ServicedComponent that implements an interface that declares a single method that returns an int and that takes no parameters. I've put GUIDs on everything that needs them (interface, component class, ApplicationID, and assembly). If I register the component with COM+ service...more >>

Hi, I have come across a puzzling problem with regard to sending the WM_SETICON message to set the big and small icons associated with a Windows Forms Application. My code works exactly as expected when running the application under Windows XP but does not work when running the same applicatio...more >>

Hi, I am migrating some of my COM components to .NET. During the process, the COM objects have to talk with the .NET components. One desire I have is that I don't have to change my COM code but still want to take the full advantage of setting up the assemblies as I want. The problem I encou...more >>

Hi, I need to populate a struct in C# and pass it into VB6. It works fine for almost all data types, but for some reason dates don't get passed through correctly. The example provided is quite simplified. In the real code, many different data types including fixed-length strings are marshal...more >>

Hi Folks, If you have got an unmanaged C++ API call such as: bool foo(LPTSTR lpszMyOutString); which returns a pointer to a pointer. How do you marchal the pointer in C# to return the string?? Cheers, Martin ...more >>

Hi all, I am writing an Add-In for Visual Studio.NET using C#. My Add-In adds items to the Edit menu and creates it's own toolbar. Each command has it's own bitmap icon. I have given each bitmap a magenta background and I am creating the images in my code using: System.Drawing.Bitmap M...more >>

I am writing a Reports add-on to an existing application in VB 6. Everything is working up to the point I try to authenticate users against the app's user data base. The vendor uses a custom hash algorithm to encrypt the passwords. The encryption is done in a COM DLL and I am having a problem co...more >>

Hello, I'm at my wits end trying to figure out the best way (or at least a way that doesn't crash) to use interop with Word for spellchecking. I've boiled my code down to its simplest form - trying only to open Word and close it, and I still get exceptions. I'm using VS 2003 and have the Of...more >>

Thanks in advance. Simon ...more >>

I have a simple utility program that relies on the user having their MS-Outlook running before my program runs. This is obviously very simple using Runtime.InteropServices.Marshal.GetActiveObject("Outlook.Application"). The utility program works like a charm when run by itself. However, if I ...more >>

hi, everybody, I declare aBuffer like this : byte *aBuffer; How can I alloct some memory to aBuffer in the C#? thanks...more >>

Hi all I am currently developing an ASP.NET app which has to use VB6 DLLs for it's business logic. With ASP, we used to be able to have the VB6 code running, and the ASP script would access the code when it created an object from the VB6 classes. This enabled me to test the ASP front end...more >>

Hi, I have written a Excel Addin in VB.NET. When I open Excel normally I want the Addin to run. However if I open Excel via automation I don't want the Addin to run. For example the addin prompts the user for some info. I use automation to get some data from a Workbook, but I don't what to ...more >>

I have an ActiveX Component that can either be used as a control on a form, or it can be instantiated in code to work as an automation server. The project I am working on contains three solutions, a Windows Application, a Web Application and a solution containing common code for accessing...more >>

Hi I have a COM object written in C#, which I'm having trouble with. It is a database access library which is being called from unmanaged C++. Unfortunately, I don't seem to be able to call multiple instances of the object from within a multi-threaded C++ app. Only one thread appears t...more >>

Anybody here can shed some light on this issue? Is it at all possible to call out-of-proc COM objects from ASP.NET? If yes, what configuration settings are required? I played around many hours already trying to get all security settings done (as I did not find specific informations I follo...more >>

I'm wrapping a call to the netapi32 function NetDfsGetClientInfo. I'm a bit stuck when it comes to the parameter LPDFS_STORAGE_INFO which is in the DFS_INFO_3 and DFS_INFO_4 structs. MSDN says that LPDFS_STORAGE_INFO is a pointer to an array of DFS_STORAGE_INFO structs. Generally, how does one ...more >>