I have two files x.h and y.h which define 'class X' and 'class Y' X has data member of type Y => there is - #include "y.h" in the file x. Y has data member of type X => there is - #include "x.h" in the file y. why the compiler doesn't let me do it ??????????!!!!!!!!! what am ...more >>

[New to MFC] I am creating a custom draw tree view based on CTreeCtrl. When the control is re-sized the background is blanked completely, resulting in a horrible flicker. I've seen various suggestions involving the use of double buffering. Those are fine but I want to understand what is w...more >>

Hi, I have created a NON-MODULE CPropertySheet in a form. And I have added several CPropertyPage to the sheet. There's a runtime error where I call SetWindowText of CProertyPage which is not the first one. I was told that the page is not a window (hWnd = NULL). Only the first page can use S...more >>

I want to use Visual C++ to build Excel an .xll. I need this because the functions I am using need to do many calculations and the speed is needed. What version of Visual C++ do I need? Is there any templates to get started with in any of the versions Thanks in advance for any help getting star...more >>

Hello, When I compile my program in Visual Studio it does not work for every input, some numbers make it crash. But compiling in gcc works for those numbers that made it crash in Visual Studio. Someone told me to check if Visual Studio is using the gcc libraries. How do I do that? I found an...more >>

I am trying to install MS Visual Studio .NET 2003 Enterprise Architect from a MSDN DVD. The problem is that I cannot change the destination folder. The "Local Path" dropdown list and text box are disabled. When I select ".NET Framework SDK", the "..." button appears allowing to change the path fo...more >>

I want to hook events handlers but need to test of any event handler is assigned or not. I need something like this: __event void OnEventHandler(Myfunc) .... if (OnEventHandler) OnEventHandler(Myfunc); else DoMyFunction(Myfunc); .... This "if (OnEventHandler)" does not get accepted by ...more >>

Hi I have to write a plugin to MS Outlook Express and MSN Messenger. Does anybody have any examples or documentation related with this topic? thanks in advance P. ...more >>

Hi, If I make a __gc type with __property set and get I set them to private:, those 2 methods are private ok but the actual generated property is public according to the object browser yet its not visible in C#. WTF? What kind of tosh is this ? ...more >>

I am noticing what seems to be a huge drop in performance in STL from VC6.0 to VC7.1. Particularly with vector. The following code shows what I mean... Any thoughts? Thanks, B //Test the speed of operations on primitive arrays and vectors #pragma warning(disable: 4786) #include <...more >>

Hi, I am getting LNK1179: invalid or corrupt file: duplicate COMDAT '<mangled name' The file compiles fine. What can I do? Schobi -- SpamTrap@gmx.de is never read I'm Schobi at suespammers dot org "Sometimes compilers are so much more reasonable than people." Scott Meyers ...more >>

Is it at all possible to compile a program written in c using the c++.net suite?...more >>

Sometimes all I want to do is build a particular solution without firing up vstudio in GUI mode and then wait whilst source control get its act together etc. Anyway I've found a nifty solution to this by adding some extra file associations. So here is how you do it: First some assumptions: ~~...more >>

When I try to compile a program, I keep getting the following error: MyProject fatal error C1108: unable to find DLL: 'alink.dll'. This dll is installed and is in .Net Framework folder. I've tried adding the location to the path and it didn't help. Any ideas on how to correct this? ...more >>

I am adding managed code to a project that I created under Visual 7.0 C++ because I want to utilize parts of the framework. The project runs fine when I am under Visual 7.0 and the Managed Code extensions are turned off. When I turn them off, one of my views terminates on the "UpdateData" call for...more >>

Greetings, I'm new to MC++ (but not C#) so bear with me. I have a question... I have created a 6502/65c02/65816 CPU processor core for a simulator (in C#) and now for a part of performance optimization, I'd like to consider Manage/unmanaged C++. I am considering building a JIT backend fo...more >>

Hello all, Well....I debugged in application further (see int32 to native int thread) and decided to make a new post as it is easier for trackability... Anyway, I am getting a Null Reference Exception (as seen in my .NET Class library) through the strtok function in my C library. When I ra...more >>

Hello: Firebird .NET Data Provider 1.5.1 available for download. Note about the Firebird RDBMS ( http://www.firebirdsql.org/ ) "Firebird is a relational database offering many ANSI SQL-92 features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent co...more >>

When compiled with Visual C++ .NET 2003 (only), the program below aborts as though no matching catch clause is present. If the copy constructor of A is made public, it successfully catches the exception instead. If I step into __CxxThrowException in debug/assembly mode, it looks like the pThrowInf...more >>

Hi, I am having one Tool, which will convert components from vc6 to Vc7 through programaticllay. (ie converting from .dsw to .sln.) While converting, the following MessageBox is comming ," The project Needs to be Converted to the visual C++ 7.0project format? Do you want to convert? Y...more >>

Hello, This topic has been 'topic' for several times in this Newsgroup. I have made an application which use a to c++ dll's (unmanaged), a managed dll and a c# application. When I run the application on anther machine I get a the following error: ----------------------------------------------...more >>

I am having a difficult time solving a memory leak in a DLL. The problem occurs because I cannot find a way to control the termination of threads managed by the DLL. In a thread procedure that is part of the DLL data segment there is an allocation that occurs from the heap. This heap allocatio...more >>

I've just installed VS.NET 2003 on my Athlon XP 1800+. However I couldn't get any project with STL includes to compile even if I create a new empty project (and added #include <string>). It gave me a bunch of "missing ;" errors. I did reinstall the whole thing a few times but it didn't work. A...more >>

I've googled this a bit and suppose I know the answer, but I'd appreciate any input: I'd like to write windows forms apps in C++, but it seems almost as if that is discouraged. As an example, practically all the books, etc. are written for C# and VB. Even Petzold. This begs the further qu...more >>

Hye, I am Jigar Mehta, currently, I am using AfxMessageBox where I need to change the caption of the messagebox using that function only... What I get is, the project name as the caption. I don't want to show my codename of the project to people in my final product, so, I want to change the...more >>

Can this be done? Is there a way to "de-alias" the int datatype so I can pass an int into a C method?? Paul ...more >>

Further to my last post, I have managed to get a child window to display. But its messages are routed to the same WNDPROC that the main window's messages are routed to - what is the way of identifying from the lParam or wParam whether the message came from a child window or the parent? And what if t...more >>

I have an unmanaged MFC project that I am referencing from a managed MFC project. The unmanaged project builds successfully, but the build of the managed project fails during the link because it cannot find the external symbols from the unmanaged class. In what directory should the dll file be place...more >>

I am currently going through the C++ step by step microsoft press book. I have VS.NET 2003 loaded. In the examples it asks me to choose "Managed C++ Application", "Generic C++ Class wizard" . I do not have these templates!!! The book comes with standard edition visual c++. I think I am dealing wi...more >>

Hi, I am trying to optimize the reading of a huge binary file into a byte[]... I am doing the following.. byte[] ba = new byte[br.BaseStream.Length]; ba = br.ReadBytes((int)br.BaseStream.Length); The problem is., BinaryReader.ReadBytes(...) only takes an int wherase Binar...more >>

Hi guys, I get the following error during runtime: Unhandled Exception: System.NullReferenceException: Object reference not = set to an instance of an object. at SXInit(Int32 ) The SXInit method is a native C function I am calling from Managed C++ = and the method is expecting a number o...more >>

Hi All, I am a beginner for VC++ .NET but I used VC++ 6.0 before. I wonder where the "run program" button has gone. Do we need to run it on command line everytime? Also when I try to run a program on command prompt I got the "cannot open include file error". How can I set the path to those i...more >>

Hi, I was trying to serialize a type that has a SortedList in it and I get the following innerexception. {"The type System.Collections.SortedList is not supported because it implements IDictionary." } Why can this not be serialized, this means I have to start packing my type into a...more >>

Hello all, I did a search through the archives and found that someone posted a message about this same error, but never got a response. I've got a small sample app that compiles and runs in VS 2002 but doesn't compile in VS 2003. In VS 2003, I get error C2668. The error comes from trying ...more >>

I have a COM dll written in C++ using VS.NET 2003. This dll is used by a VB 6 program. The dll fires notifications to the VB program which are handled using WithEvents. I pass COM interfaces as arguments to the various notification functions. This works fine on 2000 and XP however it fails on NT. On...more >>

Hi, Why doesnt the runtime set the object to null when the finalizer has been called? Wouldnt this prevent a slew of bugs? I just called the obj.__dtor(); from a MC++ wrapper class I made and its still referencing the type even tho its "destructed". Why do I have to set it to null in m...more >>

Hello, I don't get any output until the build finishes using this command line... "C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\IDE\devenv.exe" test.sln /build debug /project proj1 under older visual studio versions, it used to show each file as it was being built. Is there...more >>

Sorry, don't know if this is the correct board for my question. I'm a novice so I guess I have a valid excuse My question : I'm using Visual C++ and I need to collect data from a serial port. Specifically, I have a piece of equipment that outputs ASCII data to my computer through the serial port...more >>

TRAINING for printer driver development. I need to take a good 1-2 week course for making printer drivers using the DDK (haven't done any driver before). Can you recommend me where??? ...more >>

Hi, I am making a wrapper class so I can call unmanaged classes from C#, I have these structs that I want to pass and get back from the unmanaged classes, do I... 1) Create a copy of these structs for the managed world like public __value struct SomeStruct { System::UI...more >>

Looking for a good example of how to show a popup menu in response to the user right-clicking on the icon in the 'taskbar notification area' (tray). I'm fine with creating the icon and responding to its messages. It's the showing of the popup menu I can't do I've tried it using TrackPopupMenu funct...more >>

HI I'am developing under Win 2000 with MS Visual Studio 6 My question What are the API functions for setting file properties? I'am talking about the proberties you can set, when you rightclick a file and put some additional data into the "Fileinfo" dialog.. Thanks a lo Thoma ...more >>

We are develping a Web service with Visual Studio .NET C++. It is necessary to invoke a virtual method in unmanaged code from managed code. It works well in debug version, but the release version fail to call the method. Thanks for any help! ...more >>

H I have a doubt in VC++ regarding file reading and displaying in the GUI (Dialog I have a binary file, which contains several piece of information , i have to read the information continuously from the file and continue to display the information in the GUI, i have created a GUI , using dialog ...more >>

i'm trying to create a class that will contain all the features of instantiating a window and showing it. I've got the SetWindowLong / GetWindowLong pair to succesfully store the 'this' pointer in the hWnd's GWL_USERDATA, but the pointer that it's referring to always seems to point to the base c...more >>

what is windows message 36? It seems to be getting fired to my wndproc even before WM_CREATE. ...more >>

It SAVES BREAKPOINTS! What an absolute genius of a program Imagine being able to debug a project, CLOSE THE SOLUTION FILE DOWN, and then open it up again, and YOUR BREAKPOINTS WILL HAVE BEEN SAVED???!!! Why didn't they think of that? ...more >>

Hi I am using a toolkit written in c++ that consists of three parts 1) video captur 2) image processin 3) OpenGL wrappe The video capture program only works with local hardware (for example usb web cam). Since I have to use a remote live camera with a fixed IP-address, I then have to write m...more >>

I am developing a com port application and am having trouble getting the following command to receive all sent bytes BOOL rc COMMTIMEOUTS CommTimeOuts CommTimeOuts.ReadIntervalTimeout = 1 CommTimeOuts.ReadTotalTimeoutMultiplier = 1 CommTimeOuts.ReadTotalTimeoutConstant = 5 CommTimeOuts.Write...more >>

Howdy, I am trying to convert my project to Visual C++ 7.1 and have the following severe problem (my previous compiler was VC 6.0 which seems to work just fine). My Application is trying to serialize and deserialize a (rather simple) class of mine to a binary file, but when trying to deserial...more >>