Hi All, I implemented an encryption algorithm using C#, native C++ and managed C++. Then I measured the CPU time used for executing this algorithm in all implementation. The managed version of C++ was the worst ! It is 20 times slower that the native version and 6 times slower that the C#...more >>

This is not really C++ specific, but does anyone of you know where one could get a large chart of the most important .NET frame work classes? kind regards, Bruno. ...more >>

What is the equivalence of ActiveX, COM, COM+ and DCOM in .NET I know there is no 100% equivalence Thank you....more >>

This function is executed when a application file is double-clicked to open in a VC++ application. Specifically, this function is enabled by RegisterShellFileTypes () in the application's InitInstance. However, under MFC 7.1 for VC++ .NET 2003, CFrameWnd::OnDDEExecute has a bug that re...more >>

When I add 'foo' to Watch, it has the value 0x000000009abcdef0 although the program output is correct. Configuration: Debug, Win32 Console. ----- #include <stdio.h> __int64 const foo = 0x123456789ABCDEF0I64; void main() { printf ("foo = 0x%I64x\n", foo); } ...more >>

Hi! I post this text 1 year ago. But no one really could give me an answer. This is the text that I posted long time ago: I have a fundamental question about The way .NET handles the object orientated way of Persistence. I am coming from JAVA and WebObjects (Apple) World and I am looking...more >>

Hi, I want to write a web application with C++ as the code behind it. I want to use existing code, which uses CString, but it would be great if I could use ATL to take care of that. I am having difficulty, looks to me like it is much more difficult (technical) to use C++ rather than C#. I a...more >>

I have some classes written in C# that work fine from Managed C++ and Visual Basic .NET in all areas except for operator overloading (+, -, *). I fully understand that I need to offer a secondary method for Visual Basic to use as it does not support operator overloading. However I would expect ...more >>

How do i call from managed C++ function wich accepts LPCSTR? void AddName( System::String *sName ) { AddName( (LPCSTR) sName )); -- does not compile. } George. ...more >>

When trying to template a class where the class declaration is in a header file and the class specification is in the source file, I receive linking errors (Unresolved External Symbols... as if I have not defined the methods). When I put everything in one file, it all works beautifully......more >>

In VC6, I used Ctrl+Shift+F8 (Table.ColumnSelect) all the time, to select the characters in the same column locations in multiple rows all the time. This doesn't work in .NET, and I haven't found the replacement. Anyone know what that is? As an example, lets say I have the following lines...more >>

First i need to tell you i am no C-Programer - i can only make some litle C changes to the code to meet our needs. Now i have the folowing problem. Our programm reads a SQL-String from the resources and gives this to the oledbCommand. This is the macro which worked fine with C++6.0: #define...more >>

Can I target the 1.0 framework from VC++ 2003? (been looking through help and on the newsgroups but can't find out how to do it in VC) Thanks Chad...more >>

I have an unmanaged class which has a member variable: gcroot<DataTable*> myDataTable; I would like to sink the RowDeleting event in my UNmanaged class. However, I can't declare an event handler in the unmanaged class because the types are managed (compiler error C3265). For example, I...more >>

Hi, In my company we're trying to migrate our application from vc6 to vc7. in one of our dlls we define the following class: class __declspec (dllexport) CExString : public CString { .... } and everything is ok until one of our functions, for example: void ExportCExStringFunc(...more >>

Hi, If I 1) create a brand new Visual C++ Project -> Class Library (.Net) 2) in the stdafx.h file add #include <atlbase.h> I get the following errors: ------ Build started: Project: testATL, Configuration: Debug Win32 ------ Compiling... Stdafx.cpp Compiling... AssemblyInfo.cpp testAT...more >>

I am completley new to the .NET framework but have a good understanding of Visual C++. I am starting to develop a new class libary which other programmers can use in their applications. To do this in Visual C++, I'll be creating a DLL with exported classes. I would like to develop this c...more >>

Hi All In order to learn C++, I want write a programm which plays back a wav file. I know some C and DSP programming. Could you give me a hint where to begin, possibly a sample programm. thanx...more >>

I have a few variables that I want declared as global. To accomplish this, I made the files globals.h and globals.cpp. In globals.h I have the declarations for the structs, and one variable actually defined. It is defined w/ the extern keyword. Then, in globals.cpp I actually define that ex...more >>

This is wierd. I have a single doc app. I create some buttons in the view OnDraw method. When I size my app window - the buttons disappear. But as soon as I click on any spot inside the window or the window frame they appear. What is going on here. I have tried everything. I have used WM_SIZ...more >>

I defined operator = using template member function for a template class. However compiler failed to recognize it is defined and created its own version (which was member-wise copy, and a result was disastrous and hard to debug bug, as pointer was copied). Adding explicit operator = helped. Se...more >>

Where are some good places to look for custom controls? I only know of code project, which has been very good. Rob ...more >>

When I have an unmanaged class (compiled without /clr or with #pragma unmanaged) with return type virtual bool, the return value always comes out true when called in managed code. Only happens with virtual and bool. Sample code below. Is anyone aware of a fix, workaround, etc? Sample C...more >>

All: I recently upgraded a VC++6 COM Server Exe project to VC++7.1 (w/ the latest PSDK). After a couple of minor hurdles, I got the project to compile and self-register. Unfortunately, when I tried to call into the server from either a VB6 or a VC6 test client, an error occurs at object cr...more >>

Does anyone have a code snippet that retrieves a windows coordinates within the desktop? I can't seem to get GetWindowPlacement() to work. And GetWindowRect returns 0,0 for the top,left corner, not the current position on the screen. Thanks. ...more >>

When I spawn a console application from a another application of mine using _spawnl(_P_NOWAIT, my_program, ......), it opens a new console window but when it is finished the window is automatically closed. Is there any way I can keep the window open even after the program terminated (I w...more >>

Hi, I am extending an existing MFC app to use Unicode (for a Japanese version of the interface elements). The app's purpose is to control a peripheral device through the serial port, and the device only understands ansi strings (in fact, I synthesize a character stream and send it as th...more >>

I have just implemented a "mixed mode" dll in VC++. I have implemented this dll in accordence with several articles found on the MSDN website including KB 814472. The crux of the problem is that when the dll is built with the \noentry linker option, I can not load the dll in a c# client....more >>

Question: Is there any way to use the Visual Studio .NET environment to easily identify C and C++ functions that are not called? If not, does anyone have any recommendations on some other software that I can quickly get my hands on to do this? Right now, I only need to do it once....more >>

I'm getting this error: Script View.cpp(40) : warning C4277: imported item 'Homegazer::CoreLibrary::ScriptTable::_Deleted' exists as both data member and function member; data member ignored ScriptTable is a C# class with a constructor and some static members and "Script View.cpp" is...more >>

Hello, linking external libraries, which linked perfectly under net 2002 bring up lots of unresolved external symbols for standard iostream calls: any idea what could cause that or how to fix that problem? Greeting Peter error LNK2019: unresolved external symbol "__declspec (dlli...more >>

Dear Brandon: You sent me some advice before as to how get the DataLink working, but I = haven't been able to get your solution to compile: You sent me this: >Hi Burton, I was able to get the following code to compile: > #using <mscorlib.dll> > #using <adodb.dll> > #using <MSDASC.dll>...more >>

hi. i have class foo. and 2 methods. X-method. Y-method. i want inside X method , to start worker thread (managed) of Y method. can i do it ,and how ? have a nice day. ...more >>

We are using Visual Studio.NET 2003 in our project with .NET framework 1.1. One of our libraries is a mixed-mode dll assembly consisting of one managed C++ library, and several unmanaged C++ libraries. We are using managed C++ as a bridge between managed .NET code and unmanaged C++ code, which...more >>

Hi ! I have a problem with the MapViewOfFile API. I use this API to store data in files in my own database system management ; when I need to store new data, is the file is NOT large enought, I close the file, reopen and grow it (CreateFileMapping) and re-call MapViewOfFile (last argument is 0,...more >>

If there is a COM component developed in vc6, can it be recompiled into vc++.net....more >>

Hi, Currently I am have an assignment which has to have some functionality which enables internet usage of client computers from a server machine. Basically this is an upgradation that I have to write to an existing software for chain of Internet Cafes. Any pointer or resource where I can f...more >>

Greetings everyone, Background: I am working on a project as an intern. When I went to my professor for some guidance, he suggested the design of the program was just about perfect for the new dotNET architecture. I looked at the frame work for dotNET and it does seem like it might be a...more >>

Dear Friends, How do write the below dynamic update Query? I am new to this SQL Query.Its very very urgent requirements. If anyone knows please help me the below SQL query. I would appreciate any help. UpdateEmployee() FieldName datatYpe EmpName - string EmpNo - int Sex ...more >>

Hi All: Can Windows Forms Application (.net) Use MFC class and Windows SDK API ? If can ,how to do ? Thanks in advance . ...more >>

VS.Net 2003 Win2k Terminal Server SP4 When a create a new ASP.Net web service and try to open the web service code behind class in the designer by double clicking in Solution Explorer, I get this task item: The designer could not be shown for this file because none of the classes with...more >>

Hi: Using messagebox class, I'm getting error saying "MessageBoxA is not a class or namespace". I'm simply calling MessageBox class in a button event this so: private: System::Void button1_Click(System::Object * sender, System::EventArgs * e) { getExistingRace* per = new getExistingRac...more >>

hi every body to make a call using TAPI i do the following: 1- initiate connectiion 2- Select an Address 3- make a call when i make a call i execute the function ITAddress::CreateCall the first parameter it takes is the distination address (BSTR bstrAddressToCall) bstrAddressToCall wi...more >>

I need to convert an IntPtr (as returned from the Form, get_Handle() method) to an HWND but can't find any information as to how it is done. I've tried everything I can think of and always seem to get an undefined value for the pHandle. HWND pHandle = (HWND)(void*)dataFormChild->get_Ha...more >>

Hi, What is the status on the "standardization" (outside MS) of the BCLs? Is everything under the System namespace going to be "standard" and everything under the Microsoft namespace custom per MS specific and in general Vendor.* namespaces for vendor specific classes. Is WinForms ...more >>

Docs say it's under General on Project props. I can't find it. Thanks, Charlie ...more >>

We've currently got a C++ client/server app that uses DCOM in order to make remote calls. We want to replace DCOM with a .NET Web Service. The server piece seems clear to me. I can write it using MC++ and then can call my native C++ server code from within the Web Service. What I am unsure ab...more >>

I have a project which when built and debugs looks for the source to atl here f:\vs70builds\3077\vc\mfcatl\ship\atlmfc\include\atlcomcli.h Has anyone seen this problem and hopefully know how to fix it so I don't have to step through assembly language each time I call some function which has a...more >>

when I set a shell hook in WIN98 I don't get an entry of any application in taskbar during my program execution. same code runs without any problem in win 2000. Also there is a problem with ReadDirectoryChangesW API in win2000. It is not recognising a api & gives UNDECLARE IDENTIFIRE error...more >>

Suppose I wanted to fill in DllRegisterServer myself for an IDispatch component. Where do I put the progid? I'm now putting it in HKCR\CLSID\{-guid-}\ProgID but whenever I want to get the CLSID I get the "invalid class string" error. The typelibrary is registered and the interface is registered,...more >>