I am having problems wiht the return type of calls to a particular dll. The function is defined as follows in C++: extern "C" DATREADER_API bool OpenFile(PTCHAR Name); DATREADER_API is defined as #define DATREADER_API __declspec(dllexport) Now, from a C++ application I am able to us...more >>

I have a COM Component. I use it from the C# applicaiton. After the usage how should I delete that from the memory. My COM component does not support Dispose method. Basically its a third party COM component written in VC++ and consumes license. Once I finished using it I want to release that...more >>

Hello, friends, We have a COM dll, cqole.dll, and we need to use it in our C#.net app. However, methods in the generated Interop.ClearQuestOleServer.dll did not agree with what we could see using Object Viewer in VB 6.0. What we saw using Object Viewer in VB 6.0 were the same as the help ...more >>

Hi group, are there any authoritative references from MS or other parties that speak to the use of Excel (via interop) as a server application? My opinion is that you should avoid this if there are alternatives since Excel was built for a single desktop usage scenario, but I'm looking for som...more >>

Hi, I have developed .NET 2005 C# library with one class X and register it as COM interop. I have enabled the ComVisible in AssemblyInfo and have checked ComInterop in project build properties. I am using this class X from VBScript with CreateObject. Everything works great. The problem sta...more >>

Hi I am quite new to VB and trying to port a VB6 wrapper for a DLL to VB .NET. The DLL might be written in C or C++ and the functions partly expect 0- terminated Byte Arrays filled with ASCII characters. The VB6 definition was: Private Declare Function TargetSetup Lib "VBtargetAccess.dll"...more >>

Hi, If I have an unmanaged host which does CoInitializeEx(0, COINIT_MULTITHREADED), and then I pass a pointer to COM interface to managed world. Why is it that when I use this interface from a background MTA thread in managed world, a QI is made and I get Unable to cast COM object of type ...more >>

This may have been addressed previously; if so, please provide a reference link. I am trying to convert String* to std:string, something like: std::string ToCppString(System::String* str) { std::string os; // if(str == 0) { return(std::string()); } System::IntPtr intPtr( Marshal::Stri...more >>

Hi, I'm having a hard time to get the following to work. I want to be able to enable and disable routing functionality of the Windows OS dynamically. The iphlpapi.dll provides to functions to do this: - DWORD WINAPI EnableRouter(HANDLE* pHandle,OVERLAPPED* pOverlapped); - DWORD WINAPI Unenabl...more >>

I'm trying to register a .net dll COM. Doing it with a setup all is working but I would like to know if there is another way to register it. I tried the regasm tool: it works when I UNREGISTER the dll but when I register the dll the message is "Types registered succesfully" but .... it doesn...more >>

I understand taht I can generate Excel and Word documents in ASP.net. My question is, given that my server has Office installed, can I have more than one Excel process generating documents at any instance? I know there are components out there but I cannot afford it now :( Any help much ap...more >>

Hello, I want to ask a question about how to do .NET COM+ registration under = Windows 2003 x64. Our .NET product can be installed without any problem under Windows 2003 = 32bit version. The installer msi package itself should be 32bit = application.=20 There are some .NET custom action...more >>

Google is not my friend tonight. Or I am just being too impatient. Anyway can someone point me to relevant MSDN articles (or other up-to-date technical info) regarding parameter passing between (unmanaged) C DLLs and VB.net programs. I haven't done that since the 16-bits days (VC1.5 & VB3). ...more >>

I have this code in a class, works fine in VS2003 but not in VS2005, somebody help me! The error said "PInvokeStackInbalance" in OpenPrinter. Imports System.IO Imports System.Drawing.Printing Imports System.Runtime.InteropServices Public Class RawPrinterHelper Shared xDocumentName As ...more >>

I've been happily using this code for some time in VS 2003. CDO.Configuration oConfig = new CDO.ConfigurationClass(); ADODB.Fields oFields = oConfig.Fields; oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = CDO.CdoSendUsing.cdoSendUsingPickup; oFields["http://sc...more >>

I have a .NET Windows Form app that uses the Internet Explorer browser control for various pieces of functionality, although what follows could pertain to any COM object. In order to subscribe to the COM object's events, I use code similar to the following taken from the book ".NET and COM: The ...more >>

Hi, I've got a C# application that uses the Virtual Server COM API, and so based on their sample code, the first thing my application does is call CoInitializeSecurity with the specified parameters. I'm using VS2003.NET and .NET 1.1 to develop the application. This has worked fine on engli...more >>

Hello, IDE: VS .NET 2003. Problem: Mangled bits of gc class embedded within native C++ class. Description: I have a gc class, BoxedInfo. This wraps a Value type structure, NotiInfo. Basically, this structure is imported into MC++ library from a C# library. //gc class in MC++ [StructLa...more >>

Hi, I'm busy writing wrapper in c# for a dll. (iaxclient.dll for anyone that are interested) It uses a number of structs that I need to convert from c to c#. I've done all of them as I think they should be done but I need someone to look over them and confirm. I'm sure I've made mistakes...more >>

Hello! Here's my situation: ..NET ************************************** I've created a simple .NET C# Class Library that uses System.Runtime.InteropServices. In it, I define this interface (that exposes some basic functions): [InterfaceType(ComInterfaceType.InterfaceIsDual)] public inte...more >>