Hello! I would like to know, how .NET could replace COM? How is it possible? Imagine an application, which is a COM server, where a client could get informations or call functions (e.g. I would like to know the name of the current opened project in the application). The client has to referen...more >>

This is probably old news, but I believe that the COM interop is leaking. I have a C++ COM server class (in process) that creates a thread, initialises COM for the thread, and then repeatedly calls an event method that has no parameters or return value. On the .NET side, in C#, the event han...more >>

Hi, We used .NET EnterpriseServices Queued components in our application to = for certain asynchronous processes (code fragments was attached) However, we found out that the "Objects", "Activated" counts in the = Component Services MMC are growing constantly. The application is running on Windo...more >>

I have used the following example from Microsoft to create this file. However when I double click on this file from the explore to open it, it is displayed with no default worksheet. In order to do this I have to click on View then Full Screen every time I want to open this excel. How ca...more >>

I managed to create a sample Add-in for Excel with a toolbar. This was painful requiring me to try all kinds of tricks until finally adding Office.dll to the Global Assembly Cache in my setup project did the trick (I discovered this by catching all Exceptions in the debugger and figuring out th...more >>

Good morning. I have a next problem: I wrote an asynchronous protocol handler in VB.NET. Another my program in VB.NET installs it as temporary handler, creates forms with WebBrowser control, and navigates to URI's handled by my handler. I encountered continuous memory leaks while navigating ...more >>

I have created a C# library, and it registers with COM just fine, I have created another app that calls it using COM and it appears to work. My only problem is that I have to use DCOM to call this library. I have checked dcomconfig and my component is not there, not as a guid and not by name....more >>

Hi, I have to deal with the Shell-Namespace - should be very easy, because the API is implemented via COM-Interfaces :-)) In my old C++ code I ask for a IShellFolder calling ::SHGetDesktopFolder(...) and from then I work only with the Shell-COM-Interfaces. OK, I can call SHGetDesktopFold...more >>

I'm trying to call the GetCurrentThread API function from a managed C++ app, but for some reason it always returns a null handle?! And calling GetLastError (or Marshal::GetLastWin32Error) returns different values depending on where I put the code. For example: The following is the code that...more >>

I'm working with a company and I desperately need to be able to connect to their DDE server. My background is .NET. Any one got any suggestions on where to start as this is my first time using DDE?...more >>

Hello, I have windows forms application that I build in VB.Net that uses Statistica (a statistics program) via an interop wrapper. As a stand alone app it works fine. Now my supervisor would like this to go to the web. Basically, I would be happy with just Statistica creating gif images accor...more >>

There doesn't seem to be an obvious (to me anyway!) way to have an interface in .NET that passes an object [] such that it can be used by (say) VBScript. In other words, given a method: [ComVisible(true), GuidAttribute("66F12379-0C8F---------- etc")] [ClassInterface(ClassInterfaceType.AutoDi...more >>

I encountered a problem when I used the .NET P-Invoke and C# delegate to make the interoperation between a win32 dll and a C# program. the flow is very simple and can be described as follows: step 1, The C# program calls a unmanaged function "SetCallBackAddress" in the win32 dll to set it...more >>

Maybe one of you cracks knows this... After I converted ShObjIdl.idl (found in C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include) with Midl.exe (found in C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Tools\Bin), in the resulting TLB file the interface IPer...more >>

Hello, I'm trying to wrap ANSI C library (MGF 3D file format parser) to my application written in C# and I have a little problem... I have currently 3 projects: - one with C source which compiles into *.lib file - a wrapper witch uses the .lib file (managed C++ library) - tester (managed C++...more >>

I'm using the Office XP PIA's VS Net 2003 ..Net Framework 1.1 Office XP (2002) I'm extracting data from a database and formatting it into a word document. The app is working great thanks to a lot of help from this group. I'm now in the process of tuning and responding to user comments. O...more >>

Hi, I am working with a PC/SC card reader now. I use Pinvoke to use winscard.dll raw APIs. I finished SCardEstablishContext, SCardListReaderGroup, SCardListReaders, SCardConnect, SCardDisconnect, SCardReleaseContext and SCardFreeMemory. But I was stopped by SCardTransmit. My codes: public s...more >>

I have a fixed length short[] that contains unicode characters (was a wchar[] array in IDL). What is the quickets way to convert to a string? The Decoder classes work off of byte[], not short. Is the only way to convert character by character or to transalte the short[] to a byte[]? Than...more >>

I am trying to call an ActiveX DLL written in VB6 from my C# app. The function call has a single parameter that is declared optional. How do I call it from C#? The VB function is: Public Function GetTasks(Optional ByVal lngUserCode As Long) As ADODB.Recordset Thanks, Rg ...more >>

Hi All! I asked this in the drawing form, but no one replied. I am working on a program that is written in C# but uses a Win32 API function call SetDIBitsToDevice from gdi32.dll (for performance reasons) in the Panel View's paint handler to do the painting. It works great when I supply n...more >>

Why do I get a zero return from the following function??? I am usting VB ..NET 2003 Public Declare Function SendMessage2 Lib "user32" Alias "SendMessageA" _(ByVal hwnd As Integer, ByVal wMsg As Integer, _ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer Public Function Rea...more >>

Hi all, I'm in the beta stage of distributing an inexpensive .NET component with which to do DNS queries. Looking for suggestions and to see how well this performs in some other-than-my-own real world situations. The current beta will run until 9/3/2004 after which I'll be selling this item ...more >>

I am having trouble with the dotNet_WorkerProcess growing until it crashes and respawns itself. The app uses a webService to process OLAP cubes thru DSO. To understand what is going on, I have simplified it into a test program that repeatedly connects to OLAP and processes a cube. Although I h...more >>

Hi all, I have a windows service that is calling a function from an unmanaged dll. The C++ declaration is : (char *) getxmlRequest(const char *szHostName, unsigned short usPort, const int nNetTimeout, void *xml, int size); My C# declarations are: [DllImport("xmlinterop.dll", EntryPoi...more >>

Hi, I have an interface in C# like so: public interface ICollectionJD { // support for enumeration [DispId(-4), Description("property _NewEnum")] IEnumerator GetEnumerator(); } I am implementing a wrapper for this managed code in C++, where I declare the inte...more >>

For some reason my users don't appreciate seeing 0.1E-08 instead of 0.00 ... can't understand why. :-) I'm using the Office XP PIA's VS Net 2003 ..Net Framework 1.1 Office XP (2002) Thanks in advance! Barry in Oregon ...more >>

Hi Evenrybody, I just wanted to know whether there is a way to get system events(, for example when a process starts or when a process ends , I want an event to be raised whithin my program to get the started or ended process or any other events in the system) or not? I just need something like...more >>

Hi gurus, Does anyone can point me to a document about the differences between COM and ..NET? thanks in advance Boris. ...more >>

Hi NG, does anybody know how to expose an WindowsForms Control written in C# as an ActiveX-Control ? I created a C#-Control, gave it the "[ClassInterface(ClassInterfaceType.AutoDual)]" -Attribute and get a (correct?!?) Typelib. But I cannot activate the control in C++ (what is my need) ...more >>

I have a.NET component that needs to be scheduled to run programmatically. How can it be done, any interface to Task Scheduler from .NET? Thanks, Arc ...more >>

I am trying to invoke a COM component (written in VB6) which accepts parameter of ParamArray data type. What would be the proper syntax in C# for passing ParamArray in VB6? Thanks. ...more >>

Hi all, Trying to use some unmanaged functions for DirectoryServices. I’m not very familiar with COM interoperability, but here is what I’ve got so far. Code: --- [ComImport] [Guid("C8F93DD0-4AE0-11CF-9E73-00AA004A5691")] [InterfaceType(ComInterfaceType.InterfaceIsDual)] internal in...more >>

I am seeing, to say the least, some very strange behavior when a C# module is making two very closely coupled interop calls, one through P-Invoke, and the next to a MCPP module that turns around and calls a native function that it linked with. The results include call stacks that appear to or...more >>

I know very little about COM, please excuse me. I am trying to convert = a c++ COM app to C# and I am having problems. I cannot change = FactoryExecMarshal. My C++ client code #import "FactoryExecMarshal.tlb" no_namespace ITestExecPtr m_pTestExec; long hr =3D m_pTestExec.CreateInstance...more >>

Greetings, Perhaps someone has seen this and can give me a clue: I'm loading a COM Automation Object (MSAccess) with late binding to avoid having to deal with multiple versions. Here is the code: //-----------------------------begin code Type accessType = Type.GetTypeFromCLSID(new Guid(...more >>

I have written a Windows service in C# which can start other EXE files in a new process, e.g. protected override void OnStart(string[] args) { Process p = new Process(); p.StartInfo = new ProcessStartInfo(@"C:\Program files\Test\Worker.exe", ""); p.Start(); } Worker.exe is a ...more >>

I have an VB ActiveX DLL with a function the receives a string parameter. I want to call this function from C#. I made a reference to the DLL in my VS 2003 project. DLL Function -------------- public function ShowMsg (strIn as String) msgbox strIn end function C# Function Call ----...more >>

I have a base class B, an inherited class A written in C#. As recommended way of interop, I create interface for both B and A. I create type library for B and A by regasm. I need to use A's function from COM, but I get an E_NOINTERFACE error. Please help! Is this a good way of doing it? ...more >>

Hi all Thist of all, sorry for X-posting, but the question involves both wininet and C# interop ;-) I wrote a simple FTP client in C# using p/Invoke over Wininet.dll API functions. It works fine, as it transparently passes ISA proxy/firewall when this doesn't require authentication. ...more >>

I am try to GetProjection Info in XP Below are my definitions, but Method call keeps returning RAS error 632(Invalid structure size) can anyone help? [DllImport(RASAPIDLLName,CharSet=CharSet.Auto)] public static extern uint RasGetProjectionInfo( [In] IntPtr rasHandle, RasPr...more >>

Hi All, We have a web-application in asp.net that interacts with legacy code written in COM. The memory usage in aspnet_wp.exe increases every sec and never reduces. Using the .NET performance counters, we found that unmanaged memory was 90% of the total private bytes of aspnet_wp.exe. We s...more >>

I've been developing projects - namely user controls - for the Pocket PC using Microsoft's .NET Compact Framework. Someone recently asked me if it is possible to use a control in a Java (for PPC, obviously) program. I know you can make .NET controls work in Java through COM and JNI on the PC, b...more >>

I added a project reference to an ActiveX DLL in my C# project. I now need to remove the reference from the project. How do I accomplish this task? Thanks, Rg ...more >>

I have VS 2003 Enterprise Architect installed (7.1.2346) but when I attempt to install the Management (WMI) Extensions for VS .NET 2003 Server Explorer I receive a message indicating that VS 2003 must be installed. How do I get around the error?...more >>

The .Net program I am writing needs to use JMS-style topics. Is there a way to make a MS Message Queue work like a JMS Topic. Or is there a way to access a JMS Topic (preferable WebLogic 8) from a .Net application. Requirements: Multiple listeners on one queue. All listeners get all m...more >>

Hi, I'm using message queue and would like to know how do I return a IntPtr to the MessageQueue object I created in IntPtr MessageQueueCreate(string name){ MessageQueue mq = new MessageQueue.Create(".\Private$\"+name); return ?? .... } and How do I use that IntPtr to get back the object ...more >>

I've seen lots of examples on how to import functions dealing with simple user-defined structs. Can someone point me to a sample that shows how to import something like the following: class CMyClass { public: CMyClass(); CMyClass(int A, int B); CMyClass(const char* S); ~C...more >>

Hi I am getting the warning: TlbImp warning: Type library importer has encountered an interface not derived from IUnknown: _HiddenInterface. when perfomring a manual import using this command line: tlbimp myvb.dll /out:myvb_COM.dll /keyfile:myvb_com.snk /asmversion:1.0.0.3800 It seems t...more >>

Hi All, I am considering using named pipes to communicate between applications on a single machine. (single server, multiple clients) As .NET doesn't include support for named pipes to my knowledge, an implementation would necessarily involve using managed/unmanaged code transitions and mar...more >>

I am developing vb.net app that works with MSAccess COM Object library, i generated RCW from VS.NET (Interop.Access.dll) on system with Access 2000 installed and it works on systems with Access 2000 and Access XP, however when i try to run it on machines with Access 2003 installed i'm getting In...more >>