Hello All My app requires runtime creation of an ActiveX control on demand. I attempted to fullfil this requirment with the following code snippet: .. .. .. System::Type ^t = System::Type::GetTypeFromProgID("CONTINUUMX.TRecordSetCtrl.1"); AxCONTINUUMXLib::AxTRecordSet ^rs = (AxCONT...more >>

hi, is there a way to ensure an application will run a single instance (for example, like word that opens each document in a different word programm) via mfc features or do i have to code it myself. i did that once by having my application reserve a socket, but this is very not elegant. i dont...more >>

hi, how can i take squre root of a number which is 300+ digits long in VC++. is there any .net class that provide this functionality. I know that in C i have to implement my own data structure( link list ) but have anybody exact idea how can i achieve this -- May you live all the days of yo...more >>

I'm trying to use a Form in C++ for the first time. Alas, my only C++ .NET book is for 2002, so it does not cover Forms. In the snippet below, where lstOutput is a Listbox control, I get the error: i:\C++\C++Code\UseForm\Form1.h(121): error C2664: 'System::Windows::Forms::ListBox::ObjectCol...more >>

Hello , Can I use what kind of toos for viewing the class of a COM DLL? Regards, Joye ...more >>

Hello! I am developping a Visual C++ .NET 2003 multiple forms application. My problem is: When running my application, I click a button and a new main menu item is created. Ok. Now I want to relate an event to the click of this new item created. How do I create an event related to a component ...more >>

Modifies code files in a C++ project to make as many class member methods 'const' as possible. It parses the methods in all the files, tries making them 'const', tests whether the build succeeds and if not reverts to the previous state. The more methods that are const, the faster the C++ prog...more >>

What does these codes mean as following? #pragma push_macro("new") #undef new...more >>

I am developing an application on Visual Foxpro 7. I would like to inculde some .NET functions in it. For this purpose I have created a dll in VC++ .net using managed c++. I have written all the code in the .h file. What should I write in the .cpp file to enable me to use the file like the...more >>

Please excuse this elementary question...but I am just dumb.... I have taken a simplistic Dialog Box and added a Progress Control. When I did that, my Dialog Box was no longer able to intialize using the DialogBox macro. If I remove the Progress Control from the form, the form displays ap...more >>

How do I set the default location to "My Computer" when using the GetOpenFileName call? I have tried the following but CSIDL_DRIVES doesn't appear to work. Any ideas? WCHAR szFile[260] = _T("text.txt"); WCHAR szPath[MAX_PATH] = _T(""); LPITEMIDLIST pidl; HRESULT hr = SHGetSpec...more >>

(Type your message here) I am supporting a system which uses ORACLE Forms, and we are getting an intermittent error: Assertion failed! Program: D:\Dev6i\bin\ifrun60.exe File: D:\f994w32\src\it\ittl.c Line: 482 Expression: !((ptimer->pflags_ittlt)&(((ittlpflg)4)))&&(current || !((ptimer->pf...more >>

Hello I'm looking for the VC++.NET equivalent of "unsafe" instruction. unsafe is a VC#.NET instruction Thanks...more >>

I am trying to create an managed wrapper but have some problems with it by using abstract classes. In my unmanaged library code i had the following three classes with the following hierarchy Referenced (class) Object (abstract class, inheriting from referenced) Node (class, inheriting f...more >>

Hello, I can use the tool such as dllexp.exe to watch the export functions which built by unmanagedC++, but I can not watch the export function or class built by managedC++ . Who know where has the tool that can watch this? Thanks. Regards, Tsung-Yu ...more >>

Hi, I'm currently wrapping my "legacy" COM component with a managed layer, to create a dual-mode component. The structure is very like the JrnlPost sample and the "Exploring COM Interoperability with ATL and Managed Extensions for C++" walkthrough. When I add a reference to my dual-mode co...more >>

Hi All, I have created a MFC ActiveX OCX, using VC++ 7.0, which contains a dialog. I have embeded another user created control (this was created with VB6). This VB6 control exposes 2 functions. I would like some help on how to call these functions from my MFC OCX (say on a button click event)....more >>

Is there any program which analyzes C++ source files and generates Managed C++ files which wraps the original C++ source files? For example, generating a __gc class for each C++ class? Please reply. Thanks in advance. Regards, Hyun-jik Bae ...more >>

(Type your message here) -------------------------------- From: Tejas Nandarshi please tell me the difference between managed and unmanaged code in vc++.net application. ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>g4p55iubVE+MfO9zycbhuQ==</Id>...more >>

Hello I'd like to create and affich an instance of the form "Form2" as a mdichild of the actual form. In C#.net, I know that is like this : Form2 MyForm=new Form2(); MyForm.MdiParent=this; MyForm.Show(); But I'd like to do it in C++.NET I think that the first line is : Form2 ^ M...more >>

I've read about a new free technology named "LayerD", and it's impresive compared to .NET or Java, it's not only really multiplatform, with this technology you can make programs in an object oriented paradigm and the Aspect Oriented Paradigm (AOP), what is more you can make your own Semantics ...more >>

Hello This code don't affich the image pictureBox1->Image->FromFile("c:\\image.jpg"); c:\image.jpg exists. Please, can you help me? Thanks...more >>

Hello I am trying to open a text file, I use this code : private: void button1_Click(System::Object^ sender, System::EventArgs^ e) { Stream^ myStream; OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog; openFileDialog1->InitialDirectory = "c:\\"; openFileDialog1->Filter = "txt fi...more >>

Hi all I hope in an answer that could help me about my problem. I'm creating a GUI in Visual C++ .NET and I'd like to split the "Spin Control" in two buttons, has someone some ideas to do this? The normal spin control ------ | up | ------- ...more >>

I have an assembly ComnAssembly.dll which is used by 3 applications. In other words there are 3 solutions which include ComnAssembly.dll project. In order to avoid manual copying I use post-build event command line inComnAssembly.dll project. The problem is that I can copy ComnAssembly.dll ...more >>

Hi, I'm trying to use _fseeki64 to read large files but getting linker error (undefined) though I link with msvcrt.lib. Can any one suggest a way to fix this problem or suggesting different function? Thanks Saran Note: I can not link with libc.lib...more >>

when I compile my program I get "fatal error C1506: unrecoverable block scoping error". Can anyone tell me why? Thank you very much in advance. namespace unManaged { template<class L> class Mytemplate : public myUnManagedClassA { }; __nogc class A : public OD_myUnManagedClassB { }; __...more >>

I have set up a website and am testing ASPs. I have created a very simple ActiveX component with two interfaces: AboutBox() - displays About details calcpi() - returns 3.14159 Here is my configuration (All the most up to date versions except for Visual C++): Windows XP (...more >>

hi may i know how can i hightlight a row in a list box using VC++?? thanks alot wayne -- wayne ------------------------------------------------------------------------ Posted via http://www.codecomments.com -----------------------------------------------------------------------...more >>

Hello, Why does the following code print "fail" instead of "123" in the vc 2005 beta? Thanks -John #include "stdafx.h" #include <sstream> int _tmain(int argc, _TCHAR* argv[]) { std::stringstream ss("123,456"); int x; ss >> x; if (ss.fail()) { printf("fail"); } ...more >>

Hi, I still try to implement a .Net wrapper to handel AVI Files. I'm unsing managed C++ with VStudio 2003. The structure of my classes looks like this: class AudioStream { ... } class VideoStream { ... } class AviFile { IAVIFile* file_; AudioStream* audio...more >>

Hello, I am finding that the file: Microsoft Visual Studio 8\VC\PlatformSDK\Lib\msi.lib does not exist even though: Microsoft Visual Studio 8\VC\PlatformSDK\Lib\AMD64\msi.lib Microsoft Visual Studio 8\VC\PlatformSDK\Lib\IA64\msi.lib Do. Was this intentional? Thanks -John...more >>

Hi, I program with Visual C++ .NET 2003. I have an application that I want to quit if a specific date is passed. (the user will not choose Quit in the menu) I want to terminate the application in the OnClose member function of my ...more >>

I have a program that uses the OleDbConnection class using C++.NET. I have all of the appropriate includes, namespaces, references, etc. and declare the class: class OleDBClass { public: gcroot<OleDbConnection*> oleConn; OleDBClass( ) {} }; inside my application class. It builds ju...more >>

Hi all, I have to recompile a MFC++ Program developped under NT4.0 in XP. We store the printer settings (DEVMODE and DEVNAMES) as part of our document. When printing in batch mode, we need to create a PrintingContext without asking the user. Here is my code fragment (I removed all error hand...more >>

I have a situation where I have a vector<gcroot<ManagedWrapperClass*> > whose contents I need to pass to an unmanaged function. Is there a way to pin all the pointers in the vector for that function? I tried to copy the vector into another vector with a pinned pointer type, but the compiler wi...more >>

Hi: Within a Windows Service, is there a way to find out if a user (any user) has already logged on to the machine ? Thanks In Advance ! Polaris ...more >>

In further work on my "baffling unresolved token error" from yesterday, I have moved to an approach of placing more code in the native .lib file which is then called from the managed wrapper. Unfortunately, I seem to be unable to debug the native .lib. It is in the same solution as my managed...more >>

Take this code: 1: int main() 2: { 3: unsigned short x[5] = { 1, 2, 3, 4, 5 }; 4: unsigned short sum = 0; 5: 6: for (int i = 0; i < 5; ++i) { 7: sum += x[i]; 8: } 9: } CL version 13.10.3077 gives the following warning: err.cpp(7) : warning C4244: '+=' : convers...more >>

hi, any1 know how to plot graph using vc++?? thanks wayne -- wayne ------------------------------------------------------------------------ Posted via http://www.codecomments.com ------------------------------------------------------------------------ ...more >>

Dear All, we have a big project with C# and MCPP mixed assemblies. Is MCPP still supported in VS2005? Do we have to change something in MCPP? With best regards, Boni ...more >>

When we have a TcpClient or TcpServer or UdpClient, receiving data and then processing them inside an infinite loop, inside a method executed by a Thread, I assume that the data being received while the previous data are processed inside the loop, are queued or something and are not dropped ri...more >>

Hi, Can I use P/Invoke to obtain a C++ class type contained in a dll? I know how to get structs and how to pass classes as parameters to native code but how do I get C++ unmanaged classes from a native dll using P/Invoke? Thx! /Tommy ...more >>

To follow up on the "copy constructor clarification thread"... The assignment operator syntax shown previously: MyClass% operator=(const MyClass%); seems to have problems if you have member properties that need to be copied from the rhs to the lhs. Since the rhs parameter is "const MyClas...more >>

I'm trying to get FFTW (fftw.org) to work in such a way that it can be called from a managed C++ module. The approach I've found to generate the fewest linker errors is a mixed managed/unmanaged project. However, that still produces the following from the linker: FFTW2 error LNK2020: unresolv...more >>

Hi, I want to initialize a static String array in MC++. What I want to do is to initialize my String array like the C# way: new String[] {"11", "22"} but I could not find an equivalent in MC++. The onlu thing I can do is this: new String*[2] but I cannot specified any initial values... Did some...more >>

I'm new in the .net environment. How can I get the current version, from my own created assembly, [assembly: AssemblyVersion("6.60.0.10")] ? Thanks Thomas ...more >>

i create a webservice and added my old .h and .cpp files. it compiles fine but gives me a runtime error... System.NullReferenceException: Object reference not set to an instance of an object. at new(UInt32 ) etc.... pointed at this line unsigned char* ucMessageUTF8 = new unsigned cha...more >>

Hi: In VisualStudio 6, there is a place allows developer to implement mapping of windows message and its handler easily under View -> ClassWizard. For example, I can map WM_TIMER to my own handler function using this feature. Just wonder, is there similar feature in .net ? I could not find...more >>

Hi, I've got this problem with source control when multiple users use the same computer. Somehow the project I work on has someone else's login to sourcesafe, which creates this subtle problem to me: whenever I edit the file, and thus the file is checked out, but checked out by someone else...more >>