Hello The following code does not work ArrayList __gc* allControls = new ArrayList(); ..... // put some Controls in allControls .... Control __gc* arr[] = dynamic_cast<Control __gc*[]>(allControls->ToArray(__typeof(Control))); The cast does not succeed and arr is NULL. This is a transl...more >>

I am porting code from c++ and would like to use managed c++ to turn it into an assembly for c#. The c++ code uses templates heavily ( via custom STL containers ) and from what I read so does managed c++. How can I expose a templated class for use in C#, or is it just an imposibility? Jason ...more >>

Hi, I can't find this article in the knowledge base anymore. But it seems it contains the fix I'm looking for. Can somebody post it here?? The problem is the designer loads my main window form extremly slow - meaning it can take up to 3 mins until I can continue working. Same thing happe...more >>

Hi, 1. I am writing some kind of a CLI Linker 2. I am using the unmanaged meta-data API. I wonder browsing "cor.h" I have encountered the 'ICeeGen' this interface is retrieved by the 'ICorModule' interface, I didn't find any API that provide me the means to get an 'ICorModule' interface, how sh...more >>

Here's my senerio -- I create a dialog resource -- Then I do an 'Add Class' specifying an MFC class with a CDialog base class. Now the Wizard goes into a loop asking me to check out lots of my project files (maybe 50 files). And it won't let me quit this until it iterates thru this set of unrelat...more >>

Hi I do mostly programming in VB6 and C# although I like to dabble in C++ now and again, I was just wondering what is a good* regular expression library to use for C++, given that I DON'T want to use managed C++. * I define "good" in this case as conforming to the following priorities, in order:...more >>

Is it possible to use a c# dll in an environment where the dot net framework has not been installed ? For example will a C++ wrapper do the job? Thanks. DD...more >>

I have written an application that runs as a subprocess of a service, where the service is a .NET C# Windows Service that simply starts the subprocess and then periodically checks that the subprocess is still running, restarting it if it have stopped. The problem is that the application is occasi...more >>

Hi, I have a Problem with unmanaged exception. In the debug build it works fine to catch unmanaged c++ exceptions from other dlls with //managed code: try { //the form loads unmanaged dlls out of which unmanaged exception //get thrown Application::Run(new Form1()); } catch (std::ex...more >>

I am stuck in a situation and I do believe that this should work, but it doesn't. I have a unmanaged dll, that uses MFC. This works great. Now I recompile the unmanaged dll so it contains mixed mode managed/unmanaged code, but only use unmanaged code, but this gives a error the moment I wan...more >>

Hi folks, I hope that this is the correct group for these things, apologies if not. I've got a strange compiler error. It appears to be similar to the issue described in knowledgebase article 320004 except that particular problem was fixed in .NET 2003, according to the article. ...more >>

I'm currently working in a mixed mode project where the exe is C#, there is a managed C++ (DLL) assembly, that in part, includes some calls into a native (unmamanged) DLL. I can build/link/run just fine, the question isn't about that. What I'm after is, if I have another client that uses the...more >>

I am reading a 160 mB file in my application. I want to access the file as shorts. FileStream->Read wants to access the file as Byte so I do the following 1) Read the filesize 2) Create a Byte[] array of the appropriate size 3) Read the file 4) Create a (global) nogc array of the same size ...more >>

Hi, We've found some pretty serious performance hits that we didn't expect in a mixed mode C++ application. The number crunching bits of our algorithms are compiled with #pragma unmanaged. They call a number of inline functions elsewhere, and from the documentation my understanding was that in...more >>

Hi, is there a possibility to set part of the strings contained in AssemblyInfo.cpp to a default value which is the same for all project? Like [assembly:AssemblyCompanyAttribute("")]; [assembly:AssemblyCopyrightAttribute("")]; [assembly:AssemblyTrademarkAttribute("")]; they are all...more >>

Hi, I would like to place an Icon on an Image. If the mouse is over this Icon, I want to display the associated text in a tooltip. How would I do this? Any ideas? My last request wasn't answered so I give it a second try. Best regards, Martin...more >>

Hi, just in case this is somewhat new: myfile.h(677): fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2701) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more inf...more >>

Suppose that I have a class in an assembly that is delivered to the user, what can I do to change the class so that it doesn't break the binary compatibility? That is, user application can run with recompiling and relinking. I know that if I define an interface, and only expose the interface ...more >>

hi everybody I am writing an application for tracking files and directory changes I used FindFirstChangeNotification FindNextChangeNotification FindCloseChangeNotification ReadDirectoryChangesW and these are working fine and I can track all changes. Now I want to interrupt th...more >>

Can you create C++ apps that do not require the .Net runtimes using C++ ..Net? ...more >>

Hi, Sorry to repost, but this is becoming aggravating, and causing me a lot of wasted time. I've got a reasonably large mixed C++ project, and after a number of builds (but not a constant number) linking (and sometimes compiling) becomes immensely slow, and task manager shows that link.exe (or...more >>

Hi All, I am spawning a process from a service. The spawned process hungs for various reasons, (corrupted data, deadlock). I am expecting the process has to complete the task with in the expected time limit, if it exceeds the limit I want to terminate the process (no mercy or graceful, just te...more >>

I would like to set a particular cell in an Excel Spreadsheet to a specific value Visual Basic Equivalent would be Cells(row, column) = x where row and column locate the cell and x is the value In C++, I can execute code such as Excel::Range* range1 = worksheet->get_Range(S"G1"...more >>

Hello. I'm moving from Visual C++ 6.0 to Visual C++ .NET 2003 and I saw the changes to the streams. I'm rewriting my code and finished doing it yesterday. All seemed to be right, but the file reading. My old code has lines like the following function call: (file is a ifstream, va...more >>

The C++/CLI Language Specification Working Draft 1.5, Jun, 2004 doesn't mention this scenario: can a handle to a ref class type be a member of a native class? Thanks, Slawomir Lisznianski [ www.rhapsodia.org ]...more >>

Lack of support for SMFs in value classes limits their use quite a bit. The C++/CLI Language Specification seem to contradict itself in a few places regarding this matter too. For example, the code snippet at page 33 of C++/CLI Language Specification Working Draft 1.5, Jun, 2004 has a point...more >>

Do ref classes indeed support instantiation on the stack? Similarly, can native classes be instantiated on gc heap? When you try to have a ref class instance on the stack, you'll get: R : cannot use this type here without a top-level '^'. When you try to instantiate a native class using g...more >>

I want to start programming in MS Visual C++. I understand that .NET is required? Or do I have to get MSStudio to integrate my work into the NET frame work? And any idea when VS 2005 is going to come out. Should I buy MSC++ now and then up-grade? I need some real basic fatherly advice in very so...more >>

How to display text or images on Desttop using vc++ programming. please help me if anyone known....more >>

Hi, can anybody point me to source code of an Outlook like sidebar (those up and down going thingies hiding the functions like calendar aso.)? Or maybe the source for the toolbox control from VS? Or are they implemented somewhere and I can download the component DLL? (Please, only free stu...more >>

I am getting an error in a Windows Form which is supposed to be a DDEClient. Error: error C2440: 'type cast' : cannot convert from 'overloaded-function' to 'PFNCALLBACK' Following are the pertinent areas of codes: First we declare the prototype outside the Form Class: HDDEDATA CALLBACK d...more >>

All, I've installed the VS 2005 Beta 1 and was trying to build our current product. I get a compile error when enum value is specified with classname::enumname::enumvalue. Seems the compiler does not want the enumname there anymore. This was not a problem with any previous versions of VS. I c...more >>

Hello, I have a .DLL compiled on VC++ 6.0 and is being linked into an application built using 7.0. For reasons that are too stupid to go into, migrating the .dll to 7.0 isn't possible for the time being. On my development PC (Windows XP), the application runs fine; i.e. the DLL calls work gr...more >>

Hi, I've got a question about .NET and pointer scope. Basically I'm trying to find out how smart .NET is with it's garbage collection and realizing when a variable is no longer used. For the sake of this question, regardless of poor programming practices, lets say I have a custom object which...more >>

Is it a need to upgrade VC 7.0 to VC 7.1? Thanks. Vicent ...more >>

How can I check if a UserGroup has the First Admin Account in it? Thanks in advance...more >>

All, I would like to write a DLL with a few function that are not available in WMI. I know how to write a dll but is there anything special that I must add to it if I want to be able to you the function from with in it. Example: In the dll there will be a function call GetMountPoint() in...more >>

The following managed C++ function is called from an unmanaged C++ DLL: double Divide( double num, double denom ) { if( denom == 0.0 ) throw new std::exception( "divide by zero" ); return num / denom; } The caller calls the function within a C++ try-catch block, with the follow...more >>

Hi, I've got a template function move_by( rect<T>&, T x, T y) being called as rect<float> r; move_by( r, 3.0, 4.0 ); However, i'm getting stupid ambiguities when I use floating point numbers. event_handler.cpp(43) : error C2782: 'void ' : template parameter 'T' is ambiguous ...more >>

I have a complex threading deadlock scenario that I've been able to reproduce in the debugger. I hit break and look at the call stack which should tell me what I need. Except I only get the very bottom of the call stack: KERNEL32.DLL!7c573b28() KERNEL32.DLL!7c573b50() boost_thread-vc7...more >>

(Please excuse me for not really knowing where to post this. I picked the biggest and best audience I know of.) I am having trouble running my release build from VC7. It doesn't. When started, it just shows a message box about failing to initialize app + hex address + OK button to close it dow...more >>

Hello, I encounter problems during execution of code like the followng that is part of Dll of managed C++ classes. When attempting to create the not managed objet (instance of CA) i always get the exception: .....System.NullReferenceException.... La référence d'objet n'est pas définie à une...more >>

In managed C++, there is variable String *s. The variable got value from a C# assembly. Then I need to convert it into char *c in order to call an external function in a dll that accepts parameter func(char c[]). How to convert from String *s to char *c? thanks Keith...more >>

In VC 6.0 I could easily add a function to handle a system message e.g. WM_TIMER. But it seems that is not possible in .NET or? Any ideas on how to do it without manually add the code? BR /// Rob ...more >>

Hi. I'm declaring a property on a base class that is represented by a pure virtual function. Something like this: public: __declspec( property( get=GetWidth ) ) int Width; virtual int GetWidth() = 0; I'm implementing GetWidth in all subclasses, but I got the following linker error: ...more >>

Hi, I'm working with images in Visual C++ and I need a fast method to access to individual pixels of an image. Actually I'm using the GetPixelAddress method of the Image class, but it's too slow. Thanks for all. ...more >>

Hi There, Does anyone can give me advices to choose a graphical library/control/ocx/other to developp an application displaying 2d lines from large data set (around 30 000 points). I have to developp this app using Visual C++(6 or .NET). These data are coming right from an electronic devic...more >>

Does VC++.Net support C99 standard? ...more >>

I have some legacy code I would like to wrap by some new managed C++ classes, put them all into a DLL and then call the managed classes from a C# app. Can anyone recommend me a link with some info about this? Also, can I statically link my DLL to my C# application or I have to ship the Mana...more >>

error PRJ0019: A tool returned an error code from "Copying assemblies to target directory..." I got this when I added a reference to a project. The reference was to a dll created in another project. Now if I copy the dll itself over to the new directory it works fine, but I don't like doing th...more >>