I have a managed C++ function which returns a managed byte array - and i need the contents of said array to be the same as the contents of a char* array (which represents image data). How can I convert this unmanaged char* to a managed Byte[]? ...more >>

I am trying to call DCOM from web service. Having "COM target does not implement IDispatch." error. Tried code from within web service, separate class, enveloped it in a separate .net dll calling dcom ( the same dll worked like a champ called from windows form ). Any help would be appreciated...more >>

Sorry for the x-post but it was suggested I post here as it is believed = that this is a COM interop problem. Here is some background information... We have an application built in Access 2003 that interfaces to MS Small = Business Accounting (SBA) through a type library. The type library wa...more >>

I posted the following a few weeks ago on another forum and have had no response, so am trying again here. -------------------------------------------------- I've got a Windows Form control that is using Twain to scan documents and which works fine in a windows application using a couple of di...more >>

My .NET application handles events from an out-of-proc COM server. These events do not execute on the app's primary thread, however. Is this a consequence of COM Interop or can this be controlled? (The .NET app is configured to run in a STA.) In a VB6 program, the events are executed on the ...more >>

I originally posted this in microsoft.public.adsi.general half an hour or so but realised that I should probably have posted it here: I need to configure Terminal Services settings in a C# program I'm working on. System.DirectoryServices doesn't seem to allow this. I've found a reference to ...more >>

Hi All, I would like to get your inputs for the following issue: I have an application written in C++, and now I'm going to add another module to it, which I'm going to write in C#, and wrap it as a COM. The new module is going to interact with the existing application during runtime (call th...more >>

Hi, I need to realize IEnumUnknown interface in .NET. So I described IEnumUnknown in .NET as: [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("00000100-0000-0000-C000-000000000046")] public interface IEnumUnknown { void Next(UInt32 requestedNumber, [MarshalAs...more >>

Hello everyone, I'm trying to do some office automation via interop in an asp.net application. An generic "Command Failed" error occurred while opening the document: Word.ApplicationClass oWordApp = new Word.ApplicationClass(); object fileName = strFileName; object readOnly = false; o...more >>

Hi, I'm developing a .NET wrapper to access COM compound files. I've imported all needed COM interfaces including IStorage and IEnumSTATSG and I can successfully open a storage file using StgOpenStorage. The problem is, when I try to enumerate the streams ans substorages inside: IEnumSTATSTG.N...more >>

Hello, I developed a class in VB.Net that provides encryption/decryption methods. It is to be used as a COM object from a ColdFusion program. I compiled the class with the "Register for COM Interop" set and registered the DLL on the ColdFusion server using RegAsm.exe. When the class' encr...more >>

C# code that compiled and ran successfully in VS 2003 is compiling but failing in VS 2005: [MTAThread] static void Main(string[] args) { CoInitializeSecurity(IntPtr.Zero, -1, IntPtr.Zero, IntPtr.Zero, (uint)RpcAuthnLevel.PktPrivacy, (uint)RpcImpLevel.Impersonate, ...more >>

Hi All, I'm trying to make an assembly in C# to use as a COM server. I'm building as normal and ruinning regasm at the end. Everything is generally working, except that I'm having a problem hiding some generic implementation base classes from the type library exporter. Here is a code sam...more >>

I would like to know how do I pass a pointer to a struct from managed code to unmanaged code. For example if I create structure like this in managed code. StructLayout( LayoutKind.Sequential, CharSet=3DCharSet.Ansi ) ] public struct MYSTRUCT { [ MarshalAs( UnmanagedType.LPStr ) ] ...more >>

Hello, First I'm french, so my english isn't very good. I try to find explanation or example to use MsGraph object directly in VB.NET application (in a windows form for example). Is it possible ? Or is it necessary to use Office application (like Excel) to use MsGraph object ? Thanks for...more >>

Trying to make a panel appear as a form with caption, icon, minimize, maximize, and close buttons (for replicating a WinForms designer). Trouble is, I would like to replace the icon and caption using properties after the control has been created. I believe the solution involves the WM_SET...more >>

i'm pInvoking a component from a web service. on my test computer with IIS5, i have the component in the \bin directory, and the call works. when i deploy to W2K3 server with IIS6, then it cannot find the component in the \bin dir. so far i've only got it to work by putting the component in t...more >>

i have a pInvoke signature that looks like the following '<SuppressUnmanagedCodeSecurity(), DllImport("CStyleDLL")> _ <DllImport("CStyleDLL")> _ Friend Shared Function ExportedMethod(ByVal strDouble As String) As Double End Function the problem is i get diff results depending on if i use th...more >>

I am tring to write simple console application in C# to test the APIs functions made available by the dymo sdk. The dymo sdk provides a dll library that can be used to call functions that will print labels on the DYMO LabelWriter printer. Here is my C# code. Please let what am I doing wrong. T...more >>

I am experimenting late binding using C#. It's quite awkward doing COM this way, but I think it's fun. I am trying to catch DocumentComplete event of DWebBrowserEvents2 in the following code: public void DocumentComplete(object pDisp, ref object URL) { try { object doc = pDisp.G...more >>

Hi. I am writing a C# interface to a C++ / C driver for a hardware card and I am having the following issue when trying to set up a callback function. When the card generates an event that causes the driver to invoke the callback, Visual Studio (or the application if running the straight ex...more >>

Hi, I would like to set the cell background color (and font color later) for a range of cells in excel using a c# application. First I set the BackColor of a textbox on a windows form to the color I would like to apply to the Excel cell/range. the color in this case is RGB(255,128,128) o...more >>

I was able to successfully send a string array to an API function. My question is how do I get it out again? I have an IntPtr received from another function which should be a pointer to the same array that was passed in to the first. -- Any help is appreciated. Thanks in advance. WALDO...more >>

Hi all, I've created a .NET app that executes a DTS package. Everything works great if I pass the appropriate parameters to the application; if I purposely pass an incorrect parameter (such as a bad database server name) it seems that the Execute call on the package goes off into lala-land...more >>

Hello all, I'm running into a brick wall here. I have a C dll I'm trying to use from my C# code. I've read a lot on this and can't figure out what is going wrong. This dll is working from a C program, so I feel it must be something I've done wrong in the C# client. The main roadblock is on cr...more >>

I have to make a program in VB.Net to flash the ROMs of different phones. The first step in the task, is to make a little application that listens to the USB ports, if any device is being connected, and give me a message. But i can't seem to find any way to do that. I've come to realise that t...more >>

We are hosting the axWebBrowser in a windows form. A web page is loaded that contains a .net user control. If we have set the UIHandler, the browser control hangs on dispose. The last call in the stack is this : system.windows.forms.dll!System.Windows.Forms.Control.ActiveXImpl.SetClientSit...more >>

I am looking for the best way to switch Windows video modes. Here is what I am trying to accomplish: I have an app that need to initially display the same content on 2 monitors hooked to a Windows XP box (mirror of the primary display). At a point in time the application needs to switch the ...more >>

Hello! I have two com interfaces: IAttrList and IOdsUtil. IOdsUtil have function IOdsUtil::GetDefaultFolder([in,out] IAttrList **atl) Both interfaces are imported into .NET producing classes CAttrList and COdsUtil Is it a right way to pass one of interfaces as an argument to method of ...more >>

Hello, I'm trying to invoke the following API's using PInvoke from a C# class, as follows: C++ API (.h) // converts an string to unicode void toUnicode(PJSTR dest, PCZSTR src); // converts unicode to string void fromUnicode(char *dest, PCJSTR src); where.... typedef const JCHAR * PCJS...more >>

I have a .NET component I am trying to expose to COM - specifically code running in an Outlook form. This component has an event that I want to catch from my VBScript. I've tried defining a COM event interface with an event that matches my control's event signature. When I instantiate the cont...more >>

Is there a BackgroundCopyManager.dll created for BITS 2.0 and where could I get it? Thanks, Bill...more >>

I got the fallowoing exception when i try to marshal the c++ structure to C# structure. " System.Runtime.InteropServices.SafeArrayTypeMismatchException: Mismatch has occurred between the runtime type of the array and the sub type recorded in the metadata." C++ structure -----...more >>

Hi, I have a problem in workaround the word application. When i doing something like inserting text,inserting values into table in a word application,which is openend through vb.net.simulateneousely when we open word application manually,document will open using existing instance(which is we ...more >>

I have a COM component on a remote machine. I think, it should be possible to access it using a .NET client and late binding as follows: Type type = Type.GetTypeFromProgId("ACOMobject.Test", "MachineName"); Object objTest = Activator.CreateInstance(type); objTest.foo(); But for some reason...more >>

Are there instructions or special gotta's about creating an Office Addin installable on a PC other than the dev machine. I have an Addin that works find on the dev machine I can run the Setup project to install and uninstall the addin on the dev machine and all works fine. When I move this t...more >>

I have defined an attribute class to describe each property of an interface. Afterwards, I declare a class implementing this interface. 'Attribute Class Declaration <AttributeUsage(AttributeTargets.Property)> _ Public Class IPSPropertyAttribute Inherits Attribute ... End Class ...more >>

Hello folks, I was trying to set some environment variable for a process I create. (The variables are my own, not system). I use SetEnvironmentVaraible() from C# code. In Debug configuration this works fine, but in Release configuration the action fails. The return value is TRUE, and no Ex...more >>

Hi, I am trying to find out where there is a memory leak in our application. I have created a test harness in C# to test this. I'm basically hitting the object (written in c++) really hard by looping through it Here is the code in c#: ################################### for (int i = 0;...more >>

Hello everyone, I have in the native DLL next method defined in header file: VOID _Case(HCASER hCaser,LPSTR pIn,LPSTR pOut); I tried wrote C# wrapper like: [DllImport(@"SlDll32.dll", EntryPoint="_Case", CharSet=CharSet.Ansi, ExactSpelling = true, CallingConventi...more >>

I am attempting to write a C# wrapper to an unmanaged C++ hardware driver and I am running into difficulty returning strings inside a struct. The C++ function takes a pointer to a struct which it fills with data. The function returns ok but the managed code fails with an null reference excepti...more >>

I have a VB.Net Console Application which references an ActiveX DLL I have written in VB6. The problem seems to be that, when I register the ActiveX DLL, it doesn't seem to necessarily put the DLL in the registry in the same place as it was on my development machine. The error states: COM ...more >>

I am attempting to write an application that will interface with a legacy API written in C. In one instance, the legacy API is invoking a call-back and providing a structure that contains an array of enums. The problem is that I cannot get the marshaller to convert the structure without an e...more >>

Hello, I must use an array of variants to pass to a COM method. So i create an IntPtr and i use GetNativeVariantForObject() which works well for the first variant because i created a very large buffer. I do not know the size of a Variant, so i can't copy the others variant. What is the ...more >>

Hi, I am developing COM addins for Word and Excel. To work with these office applications my project has references to the corresponding COM objects (Microsoft Word 11.0 Object Library, for instance). Recently I started using a second computer for development. After having copied my proj...more >>

Here is the overview: I have a presentation layer (it can be an web page or a windows form), a Business Layer where business rules are enforced and a Data Layer which knows about the physical data store. The business layer does not know anything about the physical data store, and all it wa...more >>

Hello, so I have an unmanaged dll c++ , which need a persistent pointer to a struct defined outside the dll , the dll keeps this pointer all along the life of the application. I use the c++ dll in a managed c# application where I initailize the struct, and where I pin its memory to pre...more >>

As I understand, there are ways to 'hook' into the CLR to aid in resolving assembly locations and other features. In a similar vain, is there a way to 'hook' into the CLR to be involved in Exceptions/Errors being returned to the unmanaged world from a .NET component being used through the...more >>

Hi, I'm developing an Managed C++ class library on top of a C++ static library. The managed C++ library will be used as a wrapper by others C# apps. How can I convert a managed array of bytes (Byte xxx[]) to an UCHAR* pointer inside the managed C++ class? Thank u in advance, Marco ...more >>

I am planning to use PDF as a final report so that users can save what they have entered in the asp.aspx form to their own hard disk. Is there a component or control that will handle this ? I donot wish to use Crystal Report nor SQL Report. All I need is: when the use presses the "Print" bu...more >>