Hi, if I add a reference to a type library in a *.tlb file to my project, I don't get a extra interop dll. If I add a reference to a *.dll containing the type library and the com object, I get a interop dll. Is there a way to compile all my code in one single dll, even when referencing t...more >>

Ok I have taken the plunge into the windows API. I want to be able to read and write from notepad (just as a learning thing). I plan to use SendMessage for at least setting the text (maybe I'm totally off in left field on that), however I really do not know where to begin. It appears that...more >>

(Originally posted to framework.aspnet.webservices, but I am casting a larger net and trying again) I am using a library supplied by a third-party vendor. Although the library has no UI, the vendor supplies it as an .OCX control. I need to utilize this library in an ASP.Net Web Service. My...more >>

Hello, First, I'm french so my english isn't very good. I must import MsProject 2000 tasks into dataTable. I would like to use "system.reflection" (or some thing like that) to write generic code in order to call each property of COM MsProject Task object. But it seems that system.reflectio...more >>

I'm having problems with a COM+ Server Application written in C# .net 1.1. The Problem only occurs on Windows 2003. I have implemented a COM+ Application containing a pooled COM+ Component. After accessing the COM+ Component using a ProgID the component isn't deactivated and stays in activated (=re...more >>

Hello. I am develop a console application that needs to interact with a 3rd party API that I believe was written in VB6. The program works fine and executes as expected, but when my program exits, I get an error that memory could not be read. I've searched around for the past few days with ...more >>

Hi I have a problem with VS not referencing ADODB as primary, but as tlbimp in the project file. Suddenly I have Interop.ADODB instead of a PIA. ADODB is referenced by a COM component included in the project. I have the same adodbdll in assembly-cache as my colleague, but he get a primary i g...more >>

Hi, I'm having a problem accessing a COM component made with VS.Net 2005 from Excel, apparently because Excel uses .Net 1 rather than 2. I can see with the debugger which mscorlib it loads: 'EXCEL.EXE': Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\mscorlib.dll', No symbols load...more >>

Ok, I know this is an old topic, but for me it's new. And with all that's been written, I still have outstanding issues. I've been able to get .NET controls to be hosted in IE and able to deal with the dependent assembly and strong name issues. But I've not been able to get Javascript to communi...more >>

****************************************************************************************************** Problem: The problem we are having is in VB6 we defined many properties of type Variant for the sole purpose of being able to store Null. These properties are typically used to store databas...more >>

Hi, If a third party provides closed source CCW wrapper while installing their software, then can it be used by any kind of COM object to access the .NET dll APIs ? Is it possible that the third party provides support for only VB6 COM objects and not for VC++ ? If we are able to Access .N...more >>

Hello all, I am trying to edit hard-coded VBA links in Access and Excel applications. Is this possible using the .NET object model? If so, have you guys got any good material/references you could point me towards? Thanks, Laken ...more >>

The next wall we're hitting... We have defined a COM object in C# .Net. We instantiate it from our main application and call a particular method on it. We try to pass a buffer of data to it which should not be interpreted. We define that method like bool function ( u...more >>

Hi, I have an application that plays mp3 and wav files using ;- QuartzTypeLib.FilgraphManager graphManager = new QuartzTypeLib.FilgraphManager(); QuartzTypeLib.IMediaControl mc = (QuartzTypeLib.IMediaControl)graphManager; mc.RenderFile(fileName); mc.Run(); now the problem is I need to k...more >>

From our main application we're creating a COM component, written in C# under .Net, which in turn contains a web edit control. This control acts as an editor, and we can enter text in it. If we run it as an in-process component, all works as expected, but when running out-of -process as a local ...more >>

I'm calling a .net / c# .dll from .ASP via Server.CreateObject(). I regasm, gacutil /i and all runs fine on XP SP1 or older. SP2 registry subracts System (??) from the registry root nodes and .ASP calling my .net dll breaks with Invalid class string to the browser. I find that I can fix a...more >>

I m new to MC++ and interoperability and I try to find a bug since a long time without succes, maybe you can help me ? (I can send you a "sample project" ... you can contact me at cdemez2@hotmail.com) I describe the problem: I have 2 MS VC2003 projects... and have difference between bot...more >>

Hey all: I'm having *exactly* the same problem that Torbj=F8rn Vik described in two of his posts titled "PInvoke failure" and "Obscure marshalling problems (NullReferenceException)" (found them on Google Groups). He unfortunately didn't receive a reply, so now I'm trying. :) Basically, the...more >>

Hello Everyone, I have a .exe COM Component which I referenced in C++.NET and when I did that it changed some signatures on function definitions.... The function I need to use have to return S_OK.... but .NET changed ths signature to void .....what is the best way to deal with this prob...more >>

Hi Sirs, I am struggling with passing arrays back from an unmagaged C DLL into C#. The DLL's functions returns pointers to e.g. integer arrays which I want to use from a C# application. Does anybody know how to write the C# wrapper ? Some more details follow: The unmanaged DLL exports ...more >>

Hi - This issue has probably been addresses elsewhere, but I cannot seem to find a good solution. Also, I posted on WinForms but did not get any replies so maybe this is the approprate ng. I have a simple (VC++ 7.1) WinForms app. The app uses the services of a staticly linked VC++ 7.1 unm...more >>

I know all about using interop to call a C or C++ function (not method) from C#, but... I want to instantiate a C++ class (e.g. call the constructor) in C# and call a method on it. For now, I'm having trouble creating the C++ class. When I do, I get a null reference exception. For now, I...more >>

Hi I've written a .net component that should be callable from asp It's worked on 3 computers, dev xp machine and 2 2003 web edition servers. But deploying to one production machine (also 2003 web edition) I'm getting some errors Had to install framework 2.0 (rebooted even tho it didn't ask f...more >>

Hi everyone, I want to access controls collection of any open window through c# code. The ultimate aim is to be able to click a button, fill in a text box through c# code (sort of automation). Any framework -- .net 1.1 / 2.0 will do. I got success till the point of getting windows handle...more >>

Hi, Could anyone point me in the direction of some examples showing how to create a .exe (or the equlivant) COM server in C# 2005. Cheers Tim...more >>

Hello group, I'm trying to expose functions contained in a dll to COM, so I can use it for example in Excel VBA (that's just one place where I need it). I have searched the internet, found some articles on it, tried out different ways and never got a dll I could use. One example: I created...more >>

I have developed a plugin for Image pro plus software in VB .NET(VS 2003) using COM Interop . The plugins works if I login as an administrator but fails to open if if its a general user. What changes should I make to the registry so that the plugin can be used even by non-admin users. ...more >>

I have an Excel 2002 spreadsheet which has a few combo boxes. The selections in the combo boxes are used for calculations. My asp.net page needs to set the value of the combo box. I understand I can retrieve the selected value by looking at it's linked cell, but I am not sure how to actually...more >>

Hi All I have label control that shows a string of words how can I find out the word under the mouse pointer ? I donot wanna read whole label string just the word that is currently under mouse pointer? Thanks in Advance. ...more >>

I am trying to open a file from VB.NET with ZwCreateFile, but I get STATUS_DATATYPE_MISALIGNMENT returned. It's hard to know which bits to post, so apologies for the dump below: <header stuff> <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto, Pack:=1)> _ Structure OBJECT_A...more >>

I have to import data from Excel. I can't add reference to Excel COM because that way I will have problems when clients will not have Excel installed. So I automate Excel through reflection. PrepareExcellObjects() { const string className = "Excel.Application"; _type = Type.GetTypeFr...more >>

Hello, to understand why I want to do this, here is some background: I am trying to migrate a big application with many forms from VB6 to ..NET. The code is only separated by the form modules; there are no layers. So the only incremental approach I see, is taking one form at a time an migr...more >>

Hi, I currently have a single struct being passed from a C++ dll to a C# app by reference. I'm now trying to pass an array of structs back to the C# app using the same technique, but I am receiving an NotSupportedException when trying to do so. All of the posts I have seen so far are passing ...more >>

I have a legacy com component with no IDispatch in the interface hierarchy. The interfaces exposed by this component are not automation compatible. There are no SAFEARRAYS / VARIANTS ....no other self describing types .... the component also exposes a sink interface . there are only c++...more >>

Hi, I have this application in which I am using webbrowser control and mshtml. I have developed this using Microsoft Visual Studio dot net 2005. Now the application works perfectly in my system and also in all the systems which have Visual Studio dot net 2003/2005. But when I try to deploy ...more >>

Hello, I have a form that I don't want to display the title bar for. The way I've implemented this is to to remove the WS_DLGFRAME style flag. However, when this form is minimized and then restored, it is restored to the wrong size. The height of the form increases 19 pixels (height of a title ...more >>

I have been playing with some interop over the last copule of days and have a small problem. I am trying to use DeviceIOControl to talk to a custom driver. I have successfull called CreateFile and have used DeviceIOControl to initialise the device. The problem I have is when i try to send data. ...more >>

Hello, I m using waveOutOpen() in C#.net code.I got the exception " Can not marshal parameter #3: The type definition of this type has no layout information." i m passing an object of a class WAVEFORMATEX that i hav written as parameter #3. I saw some other codes, where such parameter is working ...more >>

Having (laboriously) implemented IInternetSecurityManager in response to WebBrowser.WebBrowserSite.IServiceProvider.QueryService, I now find that (a) only GetSecurityID() and MapUrlToZone() get called, and (b) nothing they return does anything useful. Return bad stuff and the WebBrowser contro...more >>

Howdy, I've worked through the few threads on this issue in the group archives but still not quite getting where i need to be. Other than whacking around some MUD code a few years ago, this is my first time with C++. Working in VS.net 2k3, my solution has a C# project and a C++ project. In...more >>

Hi, Introduction: I have developed an interop project built of an unmanaged COM object and a ..NET WinForm application, the WinForm Application implement the user interface while the unmanaged COM implements a collection of mathematical calculations and algorithms. The COM object, when ...more >>

I am trying to implement an COM object (in ATL), that can be used in a variety of contexts (Win32 console apps, MFC dialog apps, WinForms C# or MC++ apps). This ActiveX control is a logger component writes a message to a log file, calls OutputDebugString, and then fires an event. The way I have...more >>

Hello, I'm looking for some insights regarding the efficiency of transferring data between managed and unmanaged code. Here, I restrict myself here to the sample task of transferring 10 double values, which demonstrates most issues. I tried the blow methods, each executed 10000 times to get ...more >>

How can I find the full path and version of a COM object at runtime? For example when my program is running on a system it could be using a different version of MAPI and CDO than what I compiled with. I would like to log the version of the DLL and the path in the file system the DLL is loa...more >>

Hello ! I use axSpreadsheet in my .NET c# application and I want to set all worksheets loaded to this component to ReadOnly, like for example TextBox.ReadOnly = true; Is it posible ? Regard, Bogdan Kot ...more >>

Hello, I am developing a dll in VB.Net for use in a COM application. Part of the functionality of the dll is to open a modeless form within the COM app. On the form is a button that runs a process. If the process throws an error it opens a messagebox describing the error. Here is th...more >>

Environment: - .Net Framework v2.0.50727 - Borland C++ Builder 5 We are extending our C++ application with functionality in a C# dll. The C++ app creates an object from the (registered) dll and calls a method in it. This method creates and uses an XslCompiledTransform object. Unfortunately, ...more >>

Hello, (Running on Windows XP Pro SP2). Firstly, can someone tell me if there is a memory leak in VS2003 & VS2005 when using COM interop concerning BSTR's not freeing up resources? Our test app, which uses a COM component to iterate over records and access their properties, seems to be l...more >>

For cleanup of COM objects that are declared local to a function on the stack, is it necessary to call Marshal.ReleaseComObject() and set the local stack variable to null to remove all rooted references? TIA Dave -- 2b || !2b...more >>

I'm trying to use libusb-win32 (http://libusb-win32.sourceforge.net/) via #libusb (http://www.icsharpcode.net/opensource/sharpusblib/) with ..NET 2.0 on Windows XP SP2. I keep getting an exception from a function, usb_get_busses(). It works the first time I call it, but throws an exception if ...more >>