I saw this nifty article which describes how to add the .NET framwork itself as a reference to your VB6 project. (Guys don't jump on me, this is a VB6, not a .NET question - please see code below.) Anyway, I'm trying to use the .NET framework to do 3DES encryption inside my VB6 application,...more >>

I'm using some example code from http://www.codeproject.com/csharp/DesktopSearch1.asp?df=100&forumid=190772&exp=0&select=1153650 to parse PDF files for a DotLucene index. It uses the query.dll com object's LoadIFilter method to return the correct IFilter for the file being parsed (the PDF IFilt...more >>

Hi guys, I got a problem about interop.adodb.dll and adodb.dll. In my company's project, we use .net web service and com+ component and web service calls com+ componet. when I compiled web services which need to reference to com+ component, the system copy adodb.dll to bin folder of web servi...more >>

Hi All, I have a C# Class Library I created. It contains a form and one class. I can access the one class from JScript OK, but when I try to access the method that launches the from I get this error message: "Class doesn't support Automation" Here is an abbreviated sample of my code: u...more >>

Hi, I have have a .NET application that is running out of memory. We suspect a memory leak in one of the COM components the application is calling. To try to isolate this, I thought I would try running the COM DLLs out-of-process in the standard surrogate, DLLHOST.EXE. To do this, I've cr...more >>

Hello. I have exported the IDL from a OCX file in oder to change some details (I removed some classes/interfaces, because they caused errors...). Then I compiled the IDL to a typelibary (*.TLB) usin MIDL. Now I want to use this component with my customized tlb in a .net project. But when ...more >>

I am writing an MC++ mixed-mode assembly (C++ and MC++) that will wrap all TAO CORBA operations so that I can incorporate TAO into a C# application. I am constrained to use TAO by the customer, so I can't use IIOP.NET. I am constrained by the project to use C#, so I can't use C++. I am usin...more >>

I am developing an application in C# using Microsoft visual studio .NET 2003. Basically, I imported a com dll in my application by adding reference to the COM dll. The com event in the original dll has the following signature: HSESULT AddModifyGroupIndication( [in] unsigned long groupListS...more >>

I'm trying to use a legacy C++ DLL in a .net application, and I'm running into problems with the application not shutting down if any of the methods on the DLL are invoked. I've tried accessing the DLL through both p/invoke, and directly through managed C++, and the results are the same. I sta...more >>

I am currently working on a new feature for my application (related to audio cd and mp3 management) which contains a cd ripping feature. What I would like to do is to present the application in the XP Autostart feature as soon as an Audio CD is inserted into a cd drive. So far I managed to g...more >>

Using XP sp2, under COM+ Applications I see the following are not working (i.e. their spheres are out of the box) ..NET utilities COM+ Explorer COM+ Utilities IIS In-Process Applications IIS Utilities Does this may explain why my C# com service did not register itself? I reinstalled...more >>

Hi I am vishal I have imported some VB UserControls in my C# application throug Interop and now i want to make a call to an interface function whic has been implemented on all the UserControls. For that i am usin following code --IntPtr unknownIntPtr = Marshal.GetIUnknownForObject(cnt); //...more >>

I have create an asp.net(.aspx) page, with a PivotTable control. I noticed that, I can't reference it in my code-behind(.aspx.vb), because it doesn't has the line 'Protected WithEvents PivotTable1 As OWC10.PivotTable' as creating other controls, liked Label, Button, ... Can anybody teach m...more >>

I have some VB6 components that I would like to reuse with my ASP.NET app. I successfully created interop .dll's for these components using the tlbimp.exe program. On my development machine the components work fine. The components are called when I press a button on the webpage. When I...more >>

Hi, all. Excuse me for my English. I have ASP.NET web service with one method "Test". This method "Test" invoke COM object method "Sleep". And COM object method "Sleep", in one's turn, call procedure "Sleep" from Windows API. If I make 2 simultaneous call of method "Test" (web service) the...more >>

Using XP sp2, under COM+ Applications I see the following with their balls hanging out: ..NET utilities COM+ Explorer COM+ Utilities IIS In-Process Applications IIS Utilities This may explain why my C# com service did not register itself. How do I fix these guys?...more >>

Is there something that has to be taken special care of when using an ActiveX control in a .Net service application? I'm creating a VB.Net service app that uses an ActiveX control on a hidden form. When I start the program as a normal application, it works. When I try to start it as a s...more >>

VB6 SP6, Visual Studio 2003 I've copied my .NET assembly (SRSNetBroker.DLL) into my project folder. I've registered it for interop using RegAsm /tlb which generated a tlb file in the local project folder. If I compile my VB6 project to EXE, then I've got the VB6 Executable, the ..NET DLL...more >>

Hi folks, I'm trying to call a COM method that has the following signature: long Foobar(long category, VARIANT* handle_list); The documentation says that handle_list is a SAFEARRAY of longs (int32) that will be populated by the function. Tlbimp (regardless of /sysarray) gives me a signa...more >>

Hello alltogether. I hope anyone of you can help me. I have a OCX-file (arsole.ocx) which contains one class. I need to call some methods of this class. They have BSTR parameters and return SHORTs (The return codes are not required to catch). When I am trying to include the OCX through the au...more >>

Hi All, Recently, I've been working on a web app that requires a VB6 Component to be reused, in the ASP.NET App (We're migrating). The Client completely denies to move the VB6 Component to a .NET Component, as they have invested heavily Money+Time+Human for a long time for building and enri...more >>

See the example below. I have a .Net class Customer which implements an interface ICustomer, and which is stored in a collection CustomerCollection. Both CustomerCollection and ICustomer are exposed to COM (ComVisible = true) My Customer object is *not* exposed to COM (ComVisible = false), main...more >>

I have a VB6 exe that calls a VB6 dll. The VB6 dll then calls a VB.net dll. I finally have everything working but my question is this. What is the best way to debug all of this code at the same time. This is how I tried to debug this. I set the VB.net class library to start up by pointin...more >>

Hi all, In my VB .NET application, I create an instance of the Internet Explorer. The Visual Studio IDE dutifully generates a DLL named Interop.SHDocVw.dll in the same directory as my executable. The problem is, when I copied my executable to a different directory without copying the In...more >>

Hello, I am a newbie to C#.I have been working in VC++ 6.0 .The dll worked fine in VC++ C# application uses a unmanaged C++ dll compiled in VS.NET. The C# passes a char[ ] or byte[ ] to WriteCard(int Sector,unsigned char * WriteBuff). The writebuff is becoming NULL.I tried by displaying Messa...more >>

I got a requirement about the pop-up block staff. It is said in MSDN that developer can implement INewWindowManager interface to handle the case under your own rules(you can override some or all of the Microsoft Internet Explorer pop-up blocking logic). After installing the XP SP2 SD...more >>

Hi, I've got a com component which raise a 0x80040202 error when assigning an delegate to his event. It works well under XP not under w2k.I tried it on multiple machines and got the same problem over and over. This is the case for on event , another one works fine on both oses. (though th...more >>

All performance tests were from v1.1 of the framework. I have read numerous articles on performance and tuning, however I am still perplexed (and a little concerned) with the performance differences in the following scenario. Scenario: C# Console app which uses the Microsoft.VisualStudio....more >>

I want a Visual Basic 6.0 web or desktop applications to communicate with a Visual basic.NET web or desktop applications. I will also want visual basic.net web or desktop applications to communicate with Visual Basic 6.0 web and desktop applications. For this communication to occur, is it...more >>

I was given a dll that was written in C++ some years ago and was asked to write a .Net wrapper for component. Using .Net's DllImport attribute I created a wrapper that works as expected on my XP box. However, when I move the wrapper (and all dependent components) to a Windows Server 2003 bo...more >>

I am basically new to the .net framework but I have experience working with Visual Basic 6.0. I just started to work in a company where I am the only programmer. I am told that I will write new code in Visual Basic.NET and will keep the old Viusal Basic 6.0 code the way it currently is. If...more >>

Hello Everyone, I'm having an issue with a .NET COM Interop Assembly within VB 6. When I try to create a new instance of a class, in VB 6.0, I receive the following error: "Error 430 - Class does not support Automation or does not support the expected interface". I created .NET COM Inte...more >>

How far is it possible to handle unmanaged C++ declarations of unions i C#?? A struct with a union is resolved wit [StructLayout(LayoutKind.Explicit)] and [FieldOffset(pos)] but wha about this one?? typedef Byte Bits; typedef union { struct { Bits queue :4; /* Network interf...more >>

I have a native C++ method that takes a function pointer as an argument. I've looked at the examples for getting a native C function to take a delegate, but I just can't seem to get it to work with a C++ method. Any ideas? A little code to give you an idea of where I am at and what I want...more >>

The ActiveX control takes this VARIANT as function argument: [id(3), helpstring("method Init")] HRESULT Init([in] VARIANT a_properties); I'm assigning it in C# as: someCOM.Init("C:\\abc.xml"); but I got some exception on this line: --------------------------- Microsoft Visual C++ D...more >>