I have a function which is something like this – public unsafe int GenerateKey(out byte[] btKey) { //Method Variables int iSuccess = -1; btKey = null; int iSymKeyLen = 0; string strFileName = @"c:\DebugLog.txt"; FileStream fsLogFile = new FileStream(strFileName,FileMode.Append,FileAc...more >>

Hi all, Is there a way to debug the VB 6.0 ctl inside VB 6.0 IDE instead of = inside VS.Net IDE ? Each VB 6.0's line of code takes forever to step in inside VS.net :( Thanks Egghead...more >>

We have a set of .Net programs that uses a shared memory segment. (see 1 for details) The problem is that in some cases, a normal domain user is no longer able to create or access the shared memory segment on a specific computer. It works on other computers for the same user. The problem pers...more >>

Can anyone direct me to C# code examples using late binding? thanks in advance jay widman ...more >>

Hi, I have a question regarding COM interop. As a reseller, we are developing extension modules for a legacy application of which we have no source code. This application is written in VB6 but will be ported to the .NET platform in the near future. In order for us to make the transition...more >>

Hi, we have a large application framework written in ASP 3.0. We are considering the possibility of moving some of our application logic over to ..NET by exposing c# classes through COM Interop. I was wondering if somebody could walk us through the process of accessing the request.form and ...more >>

Helllo all, I have a COM server that exposes an explicit interface that has a method that accepts a VARIANT datatype. I want to use this to pass arrays of integers/doubles/BSTR from my C++ app to a separate C# application. I can move individual int, double, BSTR without a problem. But ...more >>

I am trying to implement a COM interface in my app that has a member function with arguments (IDL form) that look like: Foo( [in, string] LPCWSTR wPath, [out, OPTIONAL] VARIANT *pdata, [out, OPTIONAL] long *plFlags); I can translate this, successfully, to: ...more >>

I have developed an implementation to automate word to be used for spell checking on a asp.net page. Basically, an instance of Word is used to capture a TextBox, spell check in Word and then write it back to the TextBox. I have that working and all is fine. Except, there is some resistance to in...more >>

Hi Guys, I wrote some code that I want vb COM to call .net assembly in Windows 2000 server. In Dotnet side, I have enable the property: Register for COM Interop. But unfortunately it it failed and give me error that is type mismatch when called method in .net assembly from vb COM. I don't kno...more >>

Hello Ying-Shen, I have been reading your postings for the past week in several= websites and you seem to be the only person who might have the= solution to my problem=2E I am trying to consolidate wmv videos= from jpg's files (still images captured from an ip cam) using= WMEncoder 9 SDK...more >>

Hi, I have a C# Exe and a VC++ ATL com dll. Now I have added the the VC++ ATL com dll to my C# Exe using Add reference. I can able to call a function in VC++ dll from my C# code. I have another function in my C# code which has to be called from VC++ something like a callback. Let me expl...more >>

Hi All, I guess I am more than slightly confused and frustrated, for the passed=20 two days I have been trying to install the Office 2003 =91primary interop= =20 assemblies=92 (pia) to the GAC. If I browse to the %systemroot%\assembly= =20 directory, they do appear in the GAC, for example t...more >>

I used scsi_pass_through with Device_io_control.But i am not getting any output.what is my mistake in my code.Any body Please help me Urgent?? [StructLayout(LayoutKind.Sequential)] class SCSI_PASS_THROUGH { public UInt16 Length;// = (UInt16) Marshal.SizeOf(typeof (SCSI_PASS_THROUGH...more >>

Hi, I am currently working on a VB.net project where i would like to use a referenced dll. The problem i face is that i would like to be able to change the dll without recompiling the project. I have read about using system.reflection but i am aware that there is quite a performance overhead,...more >>

I am facing a problem with Visual C# 2003 and MS Word XP. I am using a customized template for Word and in that template I have defined some bookmarks. I am trying to create a Word document based on the customized template, reading all the bookmarks and replacing them with desired values, re...more >>

Hi, I'm not sure, but I may have found a memory leak between vb6 and .net. Of course, it is possible that I just don't understand something correctly or I did something wrong. In any event, what I've done is create a C# class library that exposes an interface through COM. If I instantiat...more >>

Hi! [partly a cross-post with win32.gdi, but noone answers questions there] I'm working on a C# project where we need to get glyph vertices from fonts. There are several examples on how to do this in C++, but interop not being my strongest side, I have some questions: 1) Most gdi functi...more >>

I am trying to develop an ATL COM object together with a C# web application that will host it. I am following the COM Interop Part 1: C# Client Tutorial, Example 2, The C# Code Approach from the April 2004 MSDN library exactly. But the client will not release the COM object. The COM object is ...more >>

Hi all, I got two library files (*.lib) and some header files which is written by ANSI C from a third party. Inside the header files, there are many struct, variables and methods declare inside. I am now want to use them in C#. I have been looking for a solution for a long time. I think th...more >>

I have a C struct and a DLL with a single function. I've used the MarshalAsAttribute, ref, DLllImport, StructLayout, UnmanagedType, etc... declarations and I'm not having any luck. I'm not really clear on when you can use the special declarations for automatic marshalling or when (or how) ...more >>

I'm working on a project that entails calling into a legacy C DLL. The original unmanaged test code (ancient C++) works OK, but after generating managed C++ shells for calling the DLL via C#, performance has taken a hit. I can't explain it--Smaller scale tests run OK, but stressing the code cau...more >>

I'm trying to run an application under another user within a winform app writen in C#. I have tried a number of different things, but it seems that the CreateProcessWithLogonW function should work to do what I need to do. This appears to work just fine in Windows 2000 and XP with service pack ...more >>

This seemed to be a popular topic a while back and I haven't seen any recent posts on it, so I'm going to ask: It is currently unsupported to create a UserControl in .NET and do the interop wrappers to make it function _properly_ when used as an ActiveX control. Is there support for this plan...more >>

I am calling a method from C# to an unmanaged dll that includes two callback methods, one for reading from a buffer and one for writing to a buffer. The callback methods have 3 parameters, all IntPtrs. The first callback to each method works fine, but the second time the read callback is cal...more >>

Is it possible to access the statistics of a remote DTC via .Net (C#) at all? Cheers Ollie Riches http://www.phoneanalyser.net Disclaimer: Opinions expressed in this forum are my own, and not representative of my employer. I do not answer questions on behalf of my employer. I'm just ...more >>

I'm creating an VB.NET class the implements 2 COM interfaces, call them IFoo and IBar. If I create an object in my local process, I can call IFoo->QI and get back the IBar interface, but if the object is hosted in a different process, the QI fails. Any ideas how I can get this working?...more >>

Hi All, I have a library(.dll). It's develop by VC++ 6.0. I would like to know how C# can used my library? When I add reference at C# project it will show my dll is not a valid assembly or COM component. How I fix this problem. I don't want rewrite my dll because it's very big project. ...more >>

Hi! I'm sure this question have been asked before, but I cannot seem to find it in here. I've have a classlibrary written in .net that's exposed to com via interop (registered in the GAC and so on). Is there anyway to call overloaded functions from a script environment? Example: Pub...more >>

I have a struct in C with a function ptr in a dll called Image.dll: The functionptr is initialized and called in the C-code The application completes the above operation and then terminates with an exception of System.OutOfMemoryException //------------C-Code---------------// typedef struct...more >>

Hi, We have a legacy application (which is quite complex and large) written in VB6. We are currently upgrading it and enhancing its functionalities. We have also adopted .NET as our new development evironment. As a result of this, the upgraded version of our application contains code which ...more >>

I'm getting a COM Object, but I'm not totally sure which COM Interface(s) it implements. How can I find this out?...more >>

hi all running into C# COM interop issue here. we are using a COM+ component to send email through the *wonderful* lotus notes server. since the COM instant might crash/hang, so we use a thread to do the sendmail process, when the COM object hangs or reach timeout. we will killing the thread t...more >>

I have a component im using in my application. When I call a method myComponent.slowMethod() my entire application hangs until slowMethod() completes. I have tried using the .net threading model to trigger the slowMethod inside a thread wrapper class but I still have the same behavior. Is ...more >>

Hello, I'm attempting to write a tooltip class that uses NativeWindow so I can get the InfoTip effect, but I'm having troubles right off the bat. I've included alot of the code to help out those who feel they might have some insite. I do NOT want someone elses project or control. I'm doing...more >>

This is a little different than the other DllImport problems I've seen. I'm calling a DLL from C# and it works great when I run inside Visual Studio .NET. But when I try to run my application from the same .EXE file that the project creates, I get "NullReferenceException: Object reference not s...more >>

I developed a COM-visible assembly, created a setup package for it and deployed the component. The wrapper registers successfully on my dev box (XP Pro), but will not register on a Server 2003 box that we have here. I created another COM-visible assembly in the past, and was able to register...more >>

Hi. I'm new to c# .net programming, coming from a java background, and am currently self learning the language trying to prepare a demo of a windows.forms application of our current java client. I've yet to undergo a training course, so im not sure if what i'm doing is correct or not. I'll ...more >>

Hi, I was wondering if anyone could explain why my c# code is not working as expected. See the inline comment for my particular problem, which occurs immediately after the call to FormatMessage: /// <summary> /// Gets the last error that occured on the calling thread. If the last error is a s...more >>

I need to pass a bitmap in the form of a byte array to an existing win32 dll from vb.net. At this point, I'm locking the bitmap data [Bitmap.Lockbits()] and then copying [Marshal.Copy] the data into a byte array on the VB side. When I make the dll call with the array, the app crashs with no e...more >>

Sorry, I'm a bit new to this. I'm writing an app that uses a Microsoft-supplied .Interop type library (for MS Virtual Server) so that I can access their COM API from my forms-based application. Things work fine on my development machine, but if I run them on any other machine (one without M...more >>

Hi all, I am trying to put a Vb6.0 activeX control into a VB.net project. The Vb = 6.0 activeX control works fine in a VB6.0 app. But the problem comes when I close down the Vb.net app. I get = the"exception privileged error". I think it is because the ActiveX = components are not shut dow...more >>

Abstract: A watched folder is monitored for XML files, once the event Created is raised, an Indesign.Application should be created And should process the XML, this works fine using a windows form application. Putting this in a Windows Service gives errors. Description: Error using a VB.NE...more >>

I created a dll in .NET using C# and I need to call this dll from a Visual C++ 6.0 application. I am programmatically calling the regasm.exe as I am getting the installroot registry key, finding the folder, get the exe, then doing a CreateProcess and it seems to function correctly. My problem...more >>

I have an ASP.NET application that exports some data to Excel via Interop. The application is working fine in Windows 2000 Server. Now we are changing our servers and we have installed Windows 2003 Server Enterprise Edition, the application works fine, but it does not export to Excel. I have look...more >>

We have a C# application that hosts a WebBrowser control. The project's output includes the file Microsoft.mshtml.dll whose size is over 8MB. This DLL is more than 20 times larger than our actual application. The large size seems to slowdown our application's startup time significantly. Also it ...more >>

I have a C struct that contains a char* and I am tring to use PInvoke (and C#) to marshal it as a string but it is not working. I was hoping someone has done something like this and will give me a hint on how to get it to work. I also have to add a uchar* that points to the start of a large uc...more >>

I have a managed application that creates an instance of an out or process com server. After releaseing any references to the server, the server lockcount will not go to zero. Only after exiting the managed application will the out of process server lock count go to zero and the process terminat...more >>

I have a C++ client calling a .NET assembly installed in a COM+ application. Client and .Net assembly/COM+ package all run on the same machine. Everything works great...but I have a question about the inner-workings of COM+. Why does COM+ require the tlb file that was generated when the assemb...more >>

Hi All, We have a set of COM Controls (OCX and DLL) that were developed in VC6. We used the .NET Interop to wrap these controls in order to make them useable on .NET environment and from managed code. The whole product is mature now, but recenty a problem occured with one of our custome...more >>