Dear group, I'm implementing an Asynchronous Pluggable Protocol. For this I needed the COM definitions of the interface IInternetProtocol, which in the shipped headerfile is derived from IInternetProtocolRoot. Because I wasn't able to find a typelib with the interface, I recreated the int...more >>

We have an VB.Net application that uses a COM automation server. There is an object leak that we don't know how to solve. objColl = autoServer.TheCollection foreach objMember in objColl . . . System.Runtime.InteropServices.Marshal.ReleaseComObject(objMember) next System.Runti...more >>

I have an old custom written ActiveX control, written in VC++6 that I am trying to use on a Windows form with C# (and also VB.NET for testing). I add the control to the toolbox using the standard ‘add/remove items’ option, and everything proceeds fine. As does adding the control to the fo...more >>

Hi, Fairly bad subject line, but I couldn't think of any better way of putting it. This piece of code: WshShell shell = new WshShellClass(); String SpecialFolder = "AllUsersDesktop"; IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(shell.SpecialFolders.Item(ref (object)Spe...more >>

Hi, I am having a serious trouble when calling a .NET Assembly from a NON-CLR app (VB6 app) through Com Wrapper. The object creation is fine; but when I try to call its method it says "Object doesn't support this property or method: 'MethodName'" . If I add reference to the TLB and do with...more >>

We have a test environment in which we instantiate a COM/ATL/C++ component from a Managed/Console/.NET/C# application. The COM component in turn instantiates and calls a .NET/C#/Class Library component using Interop as below: #import "demologger.tlb" raw_interfaces_only named_guids no_names...more >>

I am once again trying to call a MC++ method from a C# method. I am building with the command line, not the IDE. This is my build file: cl /clr mc.cpp csc /r:mc.exe /t:module csh.cs Here are the source files: csh.cs using System; using MCfu; namespace InHere { public class Ap...more >>

Is there a way to prevent a method from being marshaled in functions like Marshal.PtrToStructure()? I've tried NonSerializableAttribute and ComVisibleAttribute, but they don't effect Marshal.SizeOf(). Basically I just want the marshaler to ignore a certain field, leaving it unitialized/zer...more >>

I have a C++ COM component. In my .idl, this is the signature of the only method: HRESULT ValidateWord ([in, string] char word[], [out] boolean *isGood); Now, I want to call this function from a C# client. This is the method signature I see: public abstract new void ValidateWord ( System.I...more >>

Newbie question. I see lots of details about how to use COM to create and manipulate Excel objects from c# here and elsewhere on the web. We're going to re-work a VBA application that we have that does some complex manipulations of Excel files, and one thing that we're considering is c# or VB an...more >>

hai, iam new to this group. while creating word application in asp.net, I face some problem. I got the error as access denied while creating instance of word.application class.can anybody able to solve this problem.its very urgent. with regards swapna ----------------------- Posted by a user...more >>

Hello, I want to access some files that have paths longer than MAX_PATH so I have to use Win32 API Unicode functions. I use these functions to getfiles and information. [DllImport("kernel32.dll", EntryPoint="FindFirstFileW", SetLastError=true, CharSet = CharSet.Unicode)] public static ...more >>

I always come down, to writing wrappers in managed code, to access Windows API dlls, why there are not simply included in the .NET framework, or any tool that would build you a wrapper from a dll? Rewriting data and methods definitions is a waste of time, done by all most every programmer usi...more >>

Hi, I have an C++ unmanaged DLL which needs buffer to be allocated from user's code (by using callback function). I am trying to use that DLL from managed C# code. Can I allocate the buffer of given size in managed memory and pass the reference to DLL? This is definition of callback in C+...more >>

I am trying to write c# code that calls C code in dlls from an outside vendor. My documentation is mostly just a header file. I have made some progress but have a couple of stumbling points. First may be simple, the header has something like typedef struct { double x; ... char Fi...more >>

I need to pass a URL from a .aspx page to some component...part of framework? that can then do a screen capture of that page...I need to save ..jpg from there.... The user would click a bookmarklet to grab the URL of the page they are viewing.... I NEED HELP with the capture part only......more >>

I have a project with legacy code in C, and new GUI code in C#. I have built a C/C++/MC++ exe that calls a C# netmodule, that all works fine. Now I need the C# to be able to call functions in the MC++ portion, but I can not make it work. I have broken it down to a small test case. In my test c...more >>

My problem is, that I need to call C# objects from Legacy VC++6.0 code. Porting to VC7.0 is not an option for now. For example I have C# class, and I need to call its Test() method. Any links or better If someone has example of how this is done. Thanks in advance -Markku- C# ===== pu...more >>

hello group: i can create and use com+ component in same computer like this: SERVER: using System; using System.EnterpriseServices ; namespace MyComPlus { /// <summary> /// Class1 µÄժҪ˵Ã÷¡£ /// </summary> public interface Class1 { string Test(); } public class Serv...more >>

Hello, I'm having a problem trying to call a DLL assembly from a C# code with some special parameters. I have a global class used to store some parameters and work with them: public class GlobalClass { public int parameter1; public string paramet...more >>

void *DiracCreate(long lambda, long quality, long numChannels, float sampleRate, long (*readFromChannelsCallback)(float **data, long numFrames, void *userData)); Anyone got any clues as to waht a VB.net or c# version would look like? I've been on this 3 hours and gettin gnowhere fast. Any...more >>

Is it at all possible to use a .NET component from a COM object without strongly naming the .NET component? ...more >>

here is the relevant IDL for what's being imported HRESULT get_monitor ( [in, string] char* name, [in, out] long* size, [in, out, size_is( *size )] nvp_struct stats[] ); Here is the struct in question typedef struct {...more >>

I have an AxWebBrowser control hosted on a .NET GUI form. By handling the BeforeNavigate2 event, I can trap URL-s like "app:action" and take the appropriate app action. That was easy: what doesn't seem to be easy is doing the same thing for <img> tags. How can I hook into img tag src parsing, ...more >>

There is a large type library whose interfaces and classes I'm going to closely approximate in my own type library. I have used OLEVIEW to generate an .IDL file from the type library itself. Would like to be able to convert this to C# so that most of the skeleton for my type library is alrea...more >>

I am using Word via interop to perform some tasks. Releasing alle references to the Word objects will not close down the winword process. To clean up I use the following rule: If the Word application object is invisible I call the Quit() method to shut down word. I wrap this behaviour in a dis...more >>

I am attempting to wrap a couple of COM dlls for use in a C# application. They are telephony components that raise alot of events through traditional COM interface callbacks. Basically objects of a type implementing a watcher interface are passed into an instance and the methods are called w...more >>

My experience doesn't match the docs. Which should I believe? I'm using C# in vs2003 to call a com interface. When defining an interface for an enumerator (Next, Skip, Reset, Clone), I was trying to figure out how to declare the Next. It seemed to make sense to do: int Next( [...more >>

Hello! Short description of problem: My C# library works as a COM object (in process), but when used in COM+ (out of process), I get some strange cast error run time. Long description of problem: I have a C# library which holds a form with a microsoft web browser component (Ax...more >>

I’m trying to write a .net app that acts as a COM object, for the most part I’ve been quite pleased with my progress. However, when I get to the point where I want to pass by ref I run into problems, is there a glaringly obvious mistake that I’ve made in my code? It all compiles fine und...more >>

Hi, I have an old unmanaged C++ code with function func(void *param) the dll is used in C# code (DLLImport) The void pointer value is needed in the C# code. The void pointer is allocated in the unmanaged C++ code (dll). How can I marshal it to C#. And how can I marshal it back to C++ ? ...more >>

I have several native DLLs that I load using managed C++ and the LoadLibrary function. Some of these DLLs are causing my application to crash (I didn't write them, they are somewhat of plugins). Some of them are causing what looks like heap corruption (freeing something twice and so forth). I ...more >>

I'm working on a VB.NET app (not ASP.NET) and need to access a password-protected website from this application. I tried to use the web browser control and .Webclient to do this but didn't get it work. I need to supply the userName & Password to login then go to a particular menu/page to uplo...more >>

I would like to understand the performance implications of passing an ADO Recordset from VB6 to C# and then accessing the recordset's rows/fields from C#. The C# application references the ADODB PIA and everything is working. The C# method that accepts the Recordset looks as follows: public vo...more >>

It seems like the System.ComponentModel.DescriptionAttribute is not working for Properties. It works for Methodes and Interfaces. If you look at the typelibrary you can see the helpstring that gets generated for the methods, but the properties stay empty... Here is my code: namespace LoadLi...more >>

I have functionality that I have to be used with a legacy VB 6 application. A assembly has been created that contains a class that implements an interface with the neccessary methods. The ProgID attribute has been used, note code example below: <ProgId("TheName.Testing"), _ ClassInterfa...more >>

Hello, I am using the Microsoft Office Document Imaging (MODI) which enables to view and use documents created with the Microsoft Office Document Image Writer (created .MDI files). I use VB.Net. I am trying to convert an MDI file to several JPG files. Here is the code (it works for thumbnai...more >>

Hi I would like to host a .NET Windows Forms user control in a VB6 COM user control and be able to reuse the .NET control in a purely .NET Windows Forms application. I would like the .NET control to be able to respond to events in the host e.g. menu clicks and toolbar button clicks. Wou...more >>

I have a C# application written in VS2003 that uses the web browser control (shdocvw.dll) via interop. I have the application working properly, however, when deploying to machines with different operating systems or service pack levels to the build machine the app is unable to load shdocvw....more >>

Hi, I'm currently writing a VB.net windows app to do some automation with word. I need to support Office 2000 and later. Basically my problem is when a user closes a document without saving first. I am able to capture Word's DocumentBeforeClose event as well as the Word Document's Close e...more >>

I'm attempting to convert a datetime from Universal Time (UTC) into my local timezone... i've got all the timezone data loaded into the proper TIME_ZONE_INFORMATION structure, and the call I'm making to SystemTimeToTzSpecificLocalTime generally works, except that this call does not account f...more >>

OK. I've been hacking away at this for what seems like eternity, but to no avail. I'm trying to start an application from a service. I need that application to be run as a specified user and I need it to be visible/interactive. I have looked through every option known to man and it looks like Lo...more >>

I am trying to work around a limitation in Marshaling. It appears that structures that contain arrays of structures cannot be marshaled (c# 2003). This is demonstrated by the fact that trying to get a Marshal.SizeOf() on these structures returns a "no meaningful size or offset can be compute...more >>

Hi, I have a VS C# project and use a COM object. I added a reference by select the registred COM component name, I see there is interop reference has been added to my project, but when I use the Object Browser to browse the just added reference, there are only interfaces and enum, but no c...more >>

I'm trying to write a wrapper in csharp to wrap DeviceIoControl() win32 method for IOCTL_VIDEO_QUERY_DISPLAY_BRIGHTNESS control code--without much luck. I've seen lots of examples out there for low-level file access but can't seem to any for the display. Can you provide some samples of how ...more >>

I am writing a C# GUI app that will basically make calls to a C API function named getadminprof() (using a supplied DLL named api.dll). The C function is defined as follows: typedef struct person_lst { char last_name[PARTNAME_LEN]; char first_name[PARTNAME_LEN]; char email_addr[EMAIL_LEN]...more >>

After reading tons of .NET documentation I don't realize yet the best solution for my requirements. I need to develop a .NET out-of-process server that exposes functionalities via CCW user by old VB6 (COM) clients. Clients and server live on the same machine across process boundaries. The ser...more >>

Hi, Using P/Invoke I have to access some functions from an unmanaged dll. One of the functions is defined as follow: extern DLL_EXPORT StatistikDaten *GetStatistik(int StatistikNummer); with typedef struct Statistik { TCHAR WaagenParameterTexte[50][256]; char InformationsTexte[50...more >>

What is the difference in checking the option 'Register for ComInterOp' and using regasm? Of coz, the former will create the tlb as well as registering it. The latter is all manual. Unfortunately, the latter technique doesn't work when the com client called createinstance. Source code...more >>

Hello, I want to implement IUPnPServiceCallback in C#. This interface is not in the typelib of UPnP dll, so I must implement it myself. Are there any references to implement COM interface in C# manually? Best regards, Zhenxin Li ...more >>