Hi, If I call .NET code from ASP by registering the .NET assemblies with COM, how can I tell in my assembly if it is being called from interop? Does anyone know that process actaully executes the .net code - if asp.net code calls my assembly then obviously the process is aspnet_wp... Thank...more >>

I keep getting an error while trying to pass a specific struct to a PInvoked method. The error code returned when calling Marshal.GetLastWin32Error() is 0x06F8. I'm trying to consume the setupapi function SetupDiGetDeviceInstallParams. The problematic struct is SP_DEVINSTALL_PARAMS. I fou...more >>

I am currently writing a toolbar for IE in C#, based on the KBBar MSDN sample http://support.microsoft.com/default.aspx?scid=kb;EN-US;821793 Its all working OK, but does anyone know how to get the toolbar to adopt the same 3d appearance as the main IE toolbars? The border of the toolbar does ...more >>

I need help getting some VB.NET code (via a DLL) to work with classic ASP to perform HMACSHA1 processing. I've created VB.NET (ApplicationType is Class Library) code using Visual Studio 2005, that can calculate a HMAC hash, Base64Encode the result, and return the value... The VB.NET code is...more >>

I have a .Net app where I want to monitor other processes & act in response to the creation, suspension, and ending of threads. Does anyone know if this is possible without manually sampling the process' thread list (in other words, actually be notified of these events rather than periodicall...more >>

I have a C++ DLL and Windows Forms C# application. How can I declare an enumeration in C++ DLL that would be visible to C# client? I am using Visual Studio 2005. Thank you in advance. Gregory Khrapunovich ...more >>

Hi, there's this type in .NET 2.0 IEnumString. I'd like to write an implementation of it in my dll which is going to be used by c++ code through COM. how can I set the value of pceltFetched properly if this parameter is not out or ref within the function? int Next ( int celt, [OutAttribu...more >>

Hi, I have a problem with an RCW reference leak when all of the following conditions are met: 1. A .NET class implements an interface that is defined by a COM typelibrary. For the sake of demonstration this COM interface is called IMyPlugIn. The .NET class is implemented in C# 2.0. 2. Th...more >>

Hi everyone, I have a .NET assembly that I'm using from classic ASP pages. One of the methods of my .NET assembly is returning a string array and I'm not able to retreive this array from the ASP page. I'm having a type mismatch error if I try to intercept the array. public string[] T...more >>

I've got an app that is written in C# using background threads, etc. Two days ago I added code to try to open an OledbConnection to a SAS file using the sas.LocalProvider. It seemed simple enough but the app would hang everytime it tried to open the connection in a background thread. Afte...more >>

Hi all, I have an assembly in .NET, that I expose to COM for interop by setting the "Register for Com Interop" setting for the project to create the TLB file. This assembly is called from classic ASP pages (because its registered with COM), and it is also called from other .NET assemblies t...more >>

I have been getting 'access violation reading location' errors occasionally in my app. I have debugged this and found it is one of my interop functions. Am I doing anything wrong here? The unmanaged function takes a pointer to some bytes in memory and a long, and returns a pointer which points s...more >>

Hi, I have an MFC8 application that is using .net 2.0 user controls, either hosted in a dialog box or a CWinFormsView. However, during this development I have been experiencing random crashes - especially why I do something like repeatedly bring up and dismiss a dialog that hosts a .net contr...more >>

It is possible to generate a IDL File in VS2005 C# if I have a ComInterop project ? Or is there a tool that convert the existing Typelib into a IDL Description ? Thomas...more >>

OK, I had an issue with this and found lots of advice that did not apply, so I'm posting what I found hoping it might help someone else. Here's the sitch: you have a COM app that calls to a .Net assembly which in turn calls a web service. You know the web service is reachable and that the COM ...more >>

I want to rewrite a legacy MFC COM code in C# and DO NOT want to modify and compile any client code who uses the component at this time. Here is part of the interface definition. The idl also expose some enum definitions. Any idea if it can be do easily and how? Some of the interface do not re...more >>

Hi everyone, Hopefully someone can help, and that I'm asking in the right place! I have two sets of solutions, both with source code. The first project is an executable, the second a DLL. When I place a breakpoint in the DLL code and step through it, going through the call stack, the function...more >>

I have a .NET managed class designed in C#, created COM Wrapper and am able to create its object in Visual Basic 6 Desktop application. I then created this .NET assembly object in Visual Basic 6 COM Application method and created the object in it. while called the method from the ASP client, it ...more >>

Do I need to free any memory using InteropServices in this instance? IntPtr ptrData = m.WParam; SizeHeight imgType = new SizeHeight(); SizeHeight imgData; imgData = (SizeHeight)Marshal.PtrToStructure(ptrData, imgType.GetType()); ...more >>

Is there any way to get DATE(typedef as double) value from .NET DateTime object? Please reply. thanks in advance. Hyun-jik Bae ...more >>

I've got a .NET application which needs to interface with a "legacy" VB 6.0 application. A great deal of the information the .NET application needs is encapsulated in a class in the legacy application, so it would be great if I could just pass an instance of the class to the .NET application....more >>

Hi All, I have referenced an dll my project. The dll has develop not .NET framework. How can i create an assembly for this dll. Please help me. Thanks to all. ...more >>

Hi, I have a managed class which is being used by an unmanaged client (via COM InterOp, Internet Explorer). I basically understand how this works (IE calls CoCreateInstance(Ex), CLR gets loaded, AppDomain(s) created, CCW created, yada yada ...). Question: Is it possible that the host p...more >>

What is the effcient way copying byte block from native C++ code to CLR object? I know there is C++/CLI array<BYTE>, however, I don't think it will be effcient because it needs loop and copy for each array element as far as I know. Please reply. Thanks in advance. Hyun-jik Bae ...more >>

Hi All, I am trying to do this and am stuck in one place. If someone can help me it would be great. I have a managed object exposed to COM via regasm. [ComVisible(true)] [InterfaceType(ComInterfaceType.InterfaceIsDual)] public interface IPanel123 .... [Serializable] [Guid...more >>

When I add a reference to a COM dll using add reference in by c# console app, the VB6 COM long variables of a function appears in the intellisense and debug errors as an int. From MSDN the sizes of the variables are: com INT Holds signed 32-bit (4-byte) integers ranging in value from -2,1...more >>

Hello, i want to use a COM-function who is declared like the following (IDL) HRESULT SetPlcData ( [in] BSTR bstrPlcString, [in] SAFEARRAY(long) * lPlcMarkers, [in] SAFEARRAY(long) * lPlcDWords ); Since i add a reference to my Studio 2003 Project (c#) to the...more >>

Hello, I have created a COM DLL which has one functionality exposed through interface. Now in my Web Application I made the reference to that DLL. I created the object and called the funtion. But after calling the function i assigned the object to null. Problem is refence is not gett...more >>

Dear all, I have one exe, it depends on some dll file. And they are interop assemblies. I run regasm /codebase, the application can run up sucessfully. But if I only run regasm without /codebase, and install the dll to GAC, then the application fail to start. It said "failed to initia...more >>

Hi, guys I have a COM interop object (named as "PlantWrap") which is written with managed c++, the plantwrap is a wrapper for another COM based server, and the threadmodel of that COM server is apartment. To call the plantwrap in work thread, I have to initialize the COM library and thread a...more >>

Hi I have a vb6 dll that i want to replace with a C# dll (slowly migrating towards a fully dotnet coded application), but I can't get the event to work. I've gotten all the methods to work, but there is an event that i can't catch ( i can't see any event in vb no matter how I declare it) In...more >>

I'm experiencing odd behavior with regasm when generating a tlb file from a managed assembly. The resulting tlb file contains method/property names on the exposed interfaces that are of a difference case than the method/property names of the original assembly. This is not consistent behavior...more >>

I am having great difficulty using my .Net 2.0 dll in an excel 2002 application. I've coded it correctly but I've found an unusual (?) problem: Excel is loading the .Net 1.1 version of the mscorlib.dll instead of the v2.0! In Excel the mscorlib.dll is the wrong version [v1.1.x.x] =========...more >>

Hello. I've written an in-process server, designed to be multithread safe. I've set the ThreadingModel in the registry to be "Both". Essentialy the IDL is: [ uuid(9691F40B-A394-40fb-BEA7-973C93F2EE20), version(1.0), helpstring("Test COM server") ] library MyTest { [l...more >>

I'm writing an MDI app in VS2005 to interop with Excel 2000. I want to provide the user with the ability to view and interact with multiple excel files, each being displayed in its own child window/WebBrowser control. The problem I am having is that when the second excel file is opened in it...more >>

I am using Interop with a C++ function which returns a pointer to an array of bytes. I'm using an IntPtr and Marshal.Copy to populate a managed array of bytes in C#, however I don't know the size I need to allocate to the array. Is there any way of calculating the size of the memory IntPtr is po...more >>

Hi I am using a winform inside excel from a com add-in. But when I open the form it has its own button on the Taskbar I guess that I get get rid of it by passing excel as the owner when I show the form but how do I do that? thank Torben Laursen ...more >>

Hi all, I've got an automation add-in which calls a web service and returns the results. As the web service may take an arbitrary time to return the response, I make the call in a worker thread, and use workerThread.Join(timeout) in the main thread to apply a timeout. If the timeout occurs...more >>

I've seen several messages and read through them and MANY websites and various MSDN items and still don't have a solution. I made a dll in C# from the code below for testing using System; using System.Runtime.InteropServices; // necessary library to use COM attributes namespace mcMat...more >>

Hello everyone, I’ve been trying for 2 days now to find any example or using NetValidatePasswordPolicy and actually making it work. However, I’ll explain my situation first, in case someone can think of another means. I wish to extend the C#/.NET2.0 Logon Control to validate passwor...more >>

I have a DLL that I've compiled in Visual C++ which I'm referencing in VB .NET The function in the DLL returns a simple structure array. I need to be able to capture this structure array in VB .NET. C++ code: struct NotesInfo { int Note; int StartTime; int EndTime; ...more >>

Hi, I want to detect in my C# app (can use iterop) if the workstation is locked. I've seen on the web people saying it's impossible except by looking if the Screensaver process is running. There must be a clean way of doing it because MSN detects it and can change your status based on this. ...more >>

Hi, I suspect that this is an interop problem, can anyone help? I'm having trouble getting the id of the user who caused an OnSave event on a calendar appointment. It is supposed to be available through the IExStoreDispEventInfo interface but it just causes an exception. **** EX...more >>

I am trying to understand why Excel fails to interact with user when it runs side by side with a win form application with embedded Excel Object. The following is the description of the problem. Excel does not respond to user's interation when Excel runs before the win form App, it works fi...more >>

OK. I have searched long and hard and wanted to know if there is an easy/elegant/direct way to enumerate through all the DocumentProperties and the CustomDocumentProperties for a Word document using C#. For example say clearing all the DocumentProperties and the CustomDocumentProperties. (usin...more >>

I'm receiving an 'unable to find entry point' error on the following DLLImport: [DllImport("S:\\Core_Dev_PreViewInterp\\Build\\ImageFile.dll", EntryPoint = "PB_Uncompress")] public static extern void PB_Uncompress(ref byte[] pOut, ref byte[] pIn, uint numBytes); The C++ declaration is as...more >>

Hi, Can anyone tell how can i enable/disable serial port? sample code would help. Either using win32 apis or uing .net framework will help. Some sample code please. Varun ...more >>

C code: [MarshalAs(UnmanagedType.ByValTStr,SizeConst=100)]public char rgwz; Tried Vb codes; <MarshalAs(UnmanagedType.ByValTStr,SizeConst=100)>public char rgwz; <MarshalAs(UnmanagedType.ByValTStr,SizeConst As Integer =100)>public char rgwz <MarshalAs(UnmanagedType.ByValTStr,SizeConst As...more >>

Hi, I've discovered in .NET 2.0 that for some reasons during reflection the System.Object parent of a ComImport marked class is swapped with System.__ComObject. Here is a sample that shows this: Assembly a = Assembly.LoadFrom(@"c:\Program Files (x86)\Microsoft.NET\Primary Interop Assemb...more >>

I am wondering if every single field of a struct needs to be completely attributed or if the runtime will marshall standard types "automagically"... This would be the PInvok'd api call: [DllImport("mywork.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)] public s...more >>