Hi I use pInvoke to call Dll. How to delete buffer which is allocated in visual c++. In Visual C ++ public void GetArray(BYTE* &buffer, UINT* length) { buffer = new BYTE[10]; //How to delete buffer in C# ...... } In C# public void GetArray(out IntPtr lpBuf, out int length); ...more >>

Hi, I wrote a console application which is called from a SQL Server job. The application utilizes a COM object, to pump data from a legacy (not very old however) application to SQL server. The application works fine, but once in a while it fails with the following message written to the event ...more >>

I see that it is possible to automate outlook with the automation object for office msoutl.olb Unfortunatly Office isn't installed on my computer. Is it possible to automate outlook using an other way ? thanks for your help...more >>

From the Platform SDK, for MMC. Please help mapping the interface IToolbar for use with C#. I'm specifically having problems with the AddButtons method, that accepts a c-style array of MMCBUTTON structure. IToolbar (from Platform SDK): [ object, uuid(43136EB9-D36C-11CF-...more >>

Hi I have a struct with 4 variables in it. How do I do if I dont want all these variable to be Marshal. Like exsample below. /Jonny public class Test { public int nType; // To be marskal public int nSize; // To be mar...more >>

I am investigating the possibility of porting an application originally developed in Borland C++ Builder 3 to C#.NET. As a proof of concept I need to develop components in C# and access them from Borland. At least one of these components is required to access the Serial port. So far...more >>

Hi, I wrote a console application which is called from a SQL Server job. The application utilizes a COM object, to pump data from a legacy (no very old however) application to SQL server. The application works fine, but once in a while it fails with the following message written to the event l...more >>

Hi, I am trying to pass structure in LParam of SendMessage API. I could not able to get the value in called window.The code and declaration is as below: //Class A //******** [DllImport("User32.Dll" , CharSet=CharSet.Auto)] private static extern long SendMessage( IntPtr hWnd, // h...more >>

It seems that some of the Office 2003 interfaces changed (Excel's theWorkbooks.Open in particular). I am using this call in my Windows Forms application. Do I have to add references to two Excel assemblies (2003 and prior) and have to seperate 'Open' calls in the 'If' statement (depending ...more >>

Hello, I am porting my existing ASP business logic into C#, compiling as an application, then using COM callable wrappers to instantiate the application under ASP. I am trying to use HttpContext.Current.Request.MapPath in my c# code, but when I call the code from ASP HttpContext.Current ret...more >>

Hi, Sorry for the cross group post, but I couldn't find a group that deals with threading in .net. Anyway, I've noticed a difference in the way my program acts on Windows 98 than it does on WindowsXP and was wondering if anybody can explain this behaviour. My application runs in the back...more >>

I'm trying to pass a callback object from .NET to COM. I implement the callback functions in class MyCallback The COM object needs a Variant VT_DISPATCH type passed to identify the callback object. C++ code: MyCallback * cb = new MyCallback(layer); Object * dispatch=new System::Runtime::Int...more >>

Hi, If I have created a word template that has a VBA function that I defined in it, is there anyway I can call this function from C#? Adam ...more >>

Is there a way to marshal unsigned arrays between managed and unmanged code? Marshal.Copy does not seem to support this and I am unable to find anything else that does. - Thanks in advance ...more >>

Hi, My .NET application has a dll with a singleton class in it. In this singleton class I create and launch a word document. In this word document I would like to add a close event handler that will call back into the .NET singleton class. Is this possible? How would I get a handle on this si...more >>

Hello all, I'm trying to get a legacy ASP application to connect to the functionality I've created in a .NET component. The ASP app needs to pass an MSXML DOMDocument to one of the methods of the component, which should then manipulate it and pass it back. My first assumption (possibly inco...more >>

I have a number of different versions of the same assembly in the GAC that I cannot seem to remove. I got them in there by using: gacutil /i emailAuth.dll. I have tried to following methods to remove them: 1. gacutil /u emailAuth 2. gacutil /uf emailAuth - both generate the following mess...more >>

Hi, I repost my message here, because I have had posted it on a wrong group. Hi, First, Please ignore my poor English speaking. I have to write a c# wrapper to a C library. This is OK, but I have difficulties with some functions that deals with double indirections. The C function is ...more >>

Hi I am really stuck on this problem, I am trying to find out the users that have permissions to access a file, I have got as far as using the GetSecurityDescriptorDacl to populate a ACCESS_ALLOWED_ACE structure. What I need to do is to first find out the sid for the account listed in the A...more >>

Hi, I'm using word in my C# windows application. I added an event handler to handle DocumentBeforeClose event. Inside the event handler, I set the second parameter Cancel to true. According to documentation, if Cancel is true, the document will not be closed. But the document closes anyw...more >>

Hello, I would like to know if someone have informations about a=20 FREE Twain API. I would like to make a program which have to control =20 cannon scanner. Best Regards, Fran=E7ois Dehaibe...more >>

hey all. i am trying to port this IDL method: HRESULT GetCurrentSample( [out,retval] IMediaSample ** ppSample ); i have already tried all of these method signatures: [PreserveSig] int GetCurrentSample( IMediaSample ppSample ); int GetCurrentSample( [Out]IMediaSample ppSample ); int GetCur...more >>

I'm trying to use DsEnumerateDomainTrusts to generate a list of trusted domains in VB.NET. The code I've listed below generates the error, "An unhandled exception of type 'System.NullReferenceException' occurred in NetDisco.exe. Additional information: Object reference not set to an inst...more >>

I'm referencing some third-party COM dlls through IDE Add Reference in VS .NET 2003. For all generated interop assemblies intellisence autocomplete works OK, except for one. For the offending one I can declare types and instantiate objects wo problems but I can't get intellisence autocomplete ...more >>

I have successfully created a C# DLL and exposed it to C++. What I want to do now is to add an interface2 to my C# DLL. The C# code compiles successfully, however when I compile my C++ code (after using Regasm and everything as well) it fails saying that my method isn't a member of interface2....more >>

Hello, I am trying to deploy a com-callable wrapper (C# dll with com interface...) On my development box where I compile with the register for com setting = true everything works great, but I can't get it to work when I install from the setup package. Any ideas? Thanks Randy...more >>

Hi, could someone help me with this code ?? It should show the Win32 FileProperty Dialog. Thanks ! ! ! Robert Public Structure SHELLEXECUTEINFO Public cbSize As Long Public fMask As Long Public hwnd As Long Public lpVerb As String Public lpFile As String Public lpParameters...more >>

Hello, I have created a dll in C# that is to be consumed by Access XP (Access 10). So I guess this means it is a com-callable wrapper. Everything works great on my development machine. I have the compiler set to Register for Com interop = true and am publishing my interfaces for COM an...more >>

Hi, Ive used strong naming and got my VB.NET dll to work on a IIS5 server in ASP But, I cannot run Shared functions or access any Shared classes from that DLL. Does anyone know if it possible to do it? Regards Fredrik Melin ...more >>

I am using the AxInterop.SHDocVw.dll in a VB.Net app to serve up and print HTML documents. Everytime I execute the code listed below I get the following error: Runtime Error! R6025 -pure virtual function call Here is the code: dir = New DirectoryInfo(HN_Scripts.ScriptDirectory) ...more >>

Hi Can anyone tell me how I marshling function below (SetMyData). It's a pointer to a pointer. Thx Jonny // // This how the structure look like in header file, // typedef struct { DWORD nType; DWORD nSize; } MyRECORD, *PMyRECORD; // // A funtion in a DLL to be ca...more >>

Hello everbody, I want to marshal structs but I always recieve following error "Can not marshal field ValueF of type STRUCT_B: This type can not be marshaled as a structure field." I have the following two structs: typedef struct STRUCT_A { int ValueA; char ValueB[64]; int Value...more >>

Hi, I have written a c# web service and generated the required proxy class, via the wsdl.exe tool. I have compiled this class and Registered it for COM interop. I can call the proxy class from a VB6 program, and it works fine. However when I try and create it in a asp page I get th...more >>

Hi All, I have an application running in folder A. This application is using a dll (C#) located in folder B. I want a sollution that inside the dll to be able to find (know) the path of the dll (C:\...path...\B). Inside the dll to find out his own location. Something simmilar with Sys...more >>

hi all. i have a C++ struct that contains a variable size array how can i interop with the such a struct: struct DATA { // a bunch of simple fields // ... char buff[1]; }; assafwo01 at hotmail dot com ...more >>

I'm using C# and providing a callback function to an unmanaged C++ function that uses the callback to send back a character string. It works find if the string sent through the callback is less than StringBuilder's default capacity (16 char). If it is greater, then C# stops and issues a "cap...more >>

Hi all, I've created a Com+ component using c# and Ado (not ado.net). The component has a method that simply receive an Ado Command, execute it and returns an Ado recordset: public ADODB.RecordSet ExecuteCommand(ADODB.CommandClass) { object ic; int opt = (int) ADODB.ExecuteOptionEnum.ad...more >>

I have a table in sql that contains the .gif file names for a catalog. I am writing a report to see if the images are the right expected size. The problem that I am having is that when I select 3 or more rows of data in sql I get the error below, but when I select 1 or two rows the every thing w...more >>

Hi, I'm trying to host a web browser inside a Windows Forms application using mshtml (axWebBrowser). However, I need to have the web control ask my application for the html to display instead of trying to find it itself. For example, my main html page just describes frames in the page, ...more >>

Hello, I'm studying for the 70-320 exam. This is from a book "COM components used by .NET applications must be registered in the Windows Registry" Is that still true? Somehow, I think maybe in framework 1.1 Microsoft made some changes that allows using COM in .NET without having to regist...more >>

Hi! Have great problems to use access my com component from c#. Tryed to import with tlbimp with and without /transform:dispret statement. I guess that tlbimp dont handle my com object correct so the solution is to do a manuell com mapping. How doIi map my idl to a c# equivalent? thanks, Alexan...more >>

I'm trying to attach event handlers to Word events in my AddIn, when I use early binding there is no problem. We want to support multiple Word versions so we want to use late binding, then the problems start, the Word application object is telling me there are no events. After reading a lot...more >>

Hello everybody, I run into a pretty stupid design problem with threading. I'm trying to connect two applications with each other. App A controls app B via COM+ (actually there can be several B apps). B creates a transient subscription to an interface, which is called from A. By default, Wi...more >>

hi all. sorry, but i don't know where else to ask this question. but how exactly does one make a TLB file? i have the IDL files and i am trying to compile them to TLB. for that i added them into a Win32 project. i defined it as a 'LIB'. i compiled it, and it gave out a bunch of *_p.c *_i...more >>

hi all. i have an IDL file. i would like to have the Interfaces in it, available in my Managed Code. how can i do this? thanks assaf ...more >>

I'm trying to use CryptoAPI to read in a certificate (.pfx) and put it into a store. I can open the store just fine, but I am having problems creating the certificate context. I think that is has to do with how I am using DllImport. Does anybody have any ideas? Here is my DllImport statement...more >>

Hi everyone. I built in .NET a 'class library' project , which then I compiled with "Register for COM interop". I also added some events. I use this component in VB6, but I can't hook up to the events. Can someone please help? In the .NET component's code, I tried to define events in ...more >>

Hello All, I'm attempting to add a c# DLL that uses unmanaged code to my VB project. When I add the C# DLL to the project and compile, all goes well but when i hit F5, i get a System.TypeLoadException (could not load type.... from assembly...) Any ideas? ...more >>

I am trying to create a c# component to automate the faxing of documents. In order for these documents to be created easily I am using html docs, but when I use the FAXCOMEXLib component to send the fax, I always get the printer window popup and must click print in order to send the fax. My mac...more >>

HI all, Im writing an application in C#, Im using some methods from a C++ .dll file, ive imported a method but it seems it cant map the type, the C++ method C++// TCHAR * WINAPI PortReadResult() { int numTimes = 0; while ( m_threadFinishedReading == false ) // see if the t...more >>