I'm still confused with managed and unmanaged In VS2005, in the same project with /CLR switch on. in managed.h ref class ManagedClass { } in unmanaged.h class UnmanagedClass { } in Main.cpp { ManagedClass^ mc = gcnew ManagedClass; // So this is managed UnmanagedClass umc...more >>

I have recently ported a project from VS .Net to VS 2005 and when I build/run it I get a run-time error "R6034". After a bit of poking around I discovered that my manifest file only contains the following <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <assembly xmlns="urn:schemas-m...more >>

Hi all, In my vc++ 2005 dialog based application i need to use a comunication activex component in a secondary thread: CFINSAxEFS* pNewAx = new CFINSAxEFS(); if ( !pNewAx->Create( NULL, NULL, CRect( 0,0,0,0), pParent, pNode->m_nFinsID) ) throw FALSE; If i use this code in the ...more >>

Hello everyone, I remembered delete[] is implemented through operator overloading, but I am not quite clear. Could anyone recommend some links about how delete[] is implemented so that I can learn and refresh my memory? :-) thanks in advance, George...more >>

Hello everyone, I asked a related question about when DllRegisterServer is called and my question is answered. Now I am thinking that when DllUnregisterServer will be called? It is reasonable to understand that during installation process or when we set Register Output to Yes in Visual...more >>

We have a mixed application that includes managed and unmanaged code. Until recently we've been able to remote debug by disabling the security policy to get the MFC managed dlls to load properly over the network. However, we are now using classes in the system.data.dll assembly which accor...more >>

Hello everyone, In MSDN for time function, time_t time( time_t *timer ); http://msdn2.microsoft.com/en-us/library/1f4c8f33(VS.80).aspx the return value of time is time_t, but in the Return Value section, it mentioned, Return the time as seconds elapsed since midnight, Januar...more >>

Hello everyone, I am wondering when function DllRegisterServer will be invoked? I am using Visual Studio 2005 to develop an in-process native (unmanaged) C++ COM. I am wondering when it will be invoked? 1. During the build process or during the DLL initialization process? 2. I find this...more >>

Is it possible to have an ATL project that also contains win32 exported classes and functions?. I have a project (module) that needs to export/expose a few ATL objects, however, other modules depend on the existing exported C++ classes. I have been adviced that to export the ATL COM object,...more >>

Hello, I'm trying to use the command "#pragma omp parallel for" within a thread but each thread that is created (and stopped again) produces a memory leak of about 44kB. If the entry for "Stack Reserver Size" in Properties->ConfigurationsProperties->Linker->System is increased, the memo...more >>

Hi all, I have a Dll code written in VC++ having lots of structures, classes etc and exporting 100s of APIs. I have to port it to VC.Net to make it managed. How can i port the whole code to make it managed. I have heard of IJW & wrapper. But please guide me how can i migrate to VC.Net. Th...more >>

I have a Win32 DLL project that needs to be refactored to support ATL. Specifically, I need to expose one COM object, that makes use of the library functionality. I tried adding a 'Simple ATL object' class directly to the project - but that (unsuprisingly), failed. I then changed the projec...more >>

Although the ScrollBar class has BackColor and ForeColor properties, these properties don't seem to have any effect. Is this correct? If so, is it possible to change the color of a ScrollBar? [==Peter==] ...more >>

In today's market, what's a good screen resolution that I can pretty much count on as being the minimum? This is kind of a 'fuzzy' question in that I'm interested in the biggest screen resolution that I can be pretty sure most people who buy a computer today (within the last year or two) wi...more >>

For the last few days, 5 to be exact, I have received a popup window when I have turned on my computer. The message in the popup says "This OS is not supported." I got a virus via MSN about a week ago, but successfully removed it with the help of a friend (we used programs such as Hijackthis, ...more >>

I am new to C# and have been studying this piece of code. It loops through an Adjacency Matrix table to populate a tree view. I have two questions about why this code works. 1. initTreeView(TreeNode N) creates a new "temp" table to hold the children for each node. Each time the table is c...more >>

Hello everyone, Are there any tool or other methods which could be used to monitor which class/method exe is accessing a DLL? Now I met with an issue that when I provide the DLL I developed to a 3rd parth application, it will crash sometimes and I suspect the 3rd party application is i...more >>

Long story short: I've been able to load a C# dll in C++ by having the C# project generating a type library (tlb) and #importing that in C+ +. The #import directive looks like a compiler shortcut that generates a tlh and tli locally. Now what I want to be able to do is generate the tlh and tli...more >>

I heared that microsoft give technical support to vb upto this year end. Can any one microsoft stops techinical support for vc++(6.0)? was microsoft announced any official date?...more >>

I am trying to statically link a xyz.lib file to my 32-bit VC++ 2005 MFC app in order to use a .sys file. I have two xyz.lib files, one for win32 and one for amd64. I know I should add the .lib file to ['Property Pages' > 'Linker' > 'Input' > 'Additional Dependencies'] But which file do I...more >>

I have written a program using MS VS VC++ 2005 Express, /cli pure. Upon compiling it it works fine in the GUI development environment. It also works fine as a Debug stand-alone. ut I had an odd behavior when it comes to the Release varsion when I renamed its project directory name it was in! ...more >>

Hi guys, I'm using delegates to execute a group of methods using the BeginInvoke, that works fine; I'm waiting for the asynch thread to return the response using the EndInvoke, that works fine also. The point is, I didn't find the way to pass a null value to the BeginInvoke method for the As...more >>

I'm programming using MS VS VC++ 2008 Express (Beta 2) in /Cli pure mode. I've found the Screen class. With it I can very easily get the count and all the data on the various Screens attached to a system, whether it be a single screen or multiple screen system. I believe the FromControl me...more >>

Hello, guys, Here I have a VC project. I used to build it in VS.Net IDE. But because of cross platform requiremment, it need to be ported into Linux. First I need to consider the build environment. I need a tool to translate the vcproj or solution file into some other common build file, suc...more >>

Hello everyone, I think printf %d works fine with signed, unsigned and negative integer values, and the same as %ld for long. Is that correct? If not, do we need to special conversion? thanks in advance, George...more >>

I'm confused about C++/CLI assemblies in Visual Studio 2005. I want to create a C++/CLI assembly in Visual Studio 2005. I know, that I can get one by using the command line compiler. I don't know, how to get one with the VS2005 IDE: - Is a library created by File|New|Project|CLR|Class Libr...more >>

Hello, I am building a .net control in C++/CLI, and it will be hosted by a C# form. The form will load some data from file and pass it to the control (an array of bytes): byte[] data = new byte[length]; .... // load the data from file mMyControl.Load(data, length); // pass data into t...more >>

I'm developing a program at home on a Windows Vista computer. In it I create a form with a few buttons on it that fill up the form's visible area. So, I took the application to work, where I use a Windows XP PRO computer. When I ran my program, the form visible area is different! Not very muc...more >>

What I'm basically trying to do is show one form from another when an event occurs. This is obviously straightforward in c#, but I'm struggling in c++ where each is wrapped in a CWinFormsDialog. The event is in the control in the CWinFormsDialog. I need the dialog to handle it and show the o...more >>

My code has suddenly stopped compiling after some refactoring I carried out last week. I am using VC8 on W2K professional I get the following cryptic error: Error 77 fatal error C1001: An internal error has occurred in the compiler. c:\program files\microsoft visual studio 8\vc\include...more >>

Hello everyone, I want to print out and log localized message according to current locale of machine. For example, if I am always use MESSAGE_ERROR macro in my program, and I want to replace it with "Error" when the locale is en_US and be replaced with French if the locale if Fr. I am ...more >>

Hello, Okay, after a few searches on Google such as, "what is .NET" and "what is C#" I am now starting to see what all this means... C++ is a language, and so is C#. You can get these languages in Visual Studio. We can somehow program in C# and when we require the power of C++, we can c...more >>

Hello everyone, I am wondering how to set DLL property (when we select the DLL and using right click to choose properties), like version, language, company, etc.? Do we need to write some code or just need to configure something in Visual Studio 2005? thanks in advance, George...more >>

What is the diffrence between C++, C#, VC++ and .NET? And what is this CLR that everyone is talking about? So if I want to use the .NET frameworks, do I have to learn C#. And how does Visual studio tie into all this? And can C# do every thing that I used to do in VC++? And where can ...more >>

If I tell the compiler to target .NET Framework 3.0 (one of the References options in VC++ 2008 Express), does it still work if they only have a higher version (say 3.5) of .NET Framework installed? Or does it look for and only work with the specific version? The various various versions (e.g....more >>

Hi, I need a way to update an Edit control control in MFC from a timer callback function. How can that be done as we cannot reference dialog box controls from callbacks? Even the following code gives me problems: VOID CALLBACK TimerProc ( HWND hParent, UINT uMsg, UINT uEventID, DWORD dwTi...more >>

My program works great in 'vanilla' /CLI, so I tried both '/CLI pure' and /CLI 'safe'. My program continues to compile and run fine in 'CLI pure' (I also use error level 4 and don't even get warning errors), but generates almost 400 compile time errors in '/CLI safe'. So, more out of curio...more >>

Hello everyone, I have learned public/private/protected inheritance, but what is virtual inheritance? Here is the sample, class Usable : public virtual Usable_lock http://www.research.att.com/~bs/bs_faq2.html#no-derivation thanks in advance, George...more >>

Hello everyone, I saw a couple of form of assert in code on Windows, 1. ASSERT; 2. assert; 3. _ASSERT; 4. _assert. Which one is the most correct to use? I saw people always define this to that, and I want to find the root one which is defined by Windows. I also saw people manually...more >>

Hi All, What are the major features/advantages in vista over xp? Any links are available by microsoft? -- Thanks & Regards, Alex. ...more >>

Hi all, I am devloping an application in VC++ with Visual Studio 2005. In this applicatin, Threadpool and stl classes are there. All threads will use(sending by pointer to vector) stl vector simultaneously for reading and writing purpose. Sometimes, application getting crash. I think, v...more >>

Hello everyone, I met with a strange issue that derived class function can not access base class's protected member. Do you know why? Here is the error message and code. [Code] error C2248: 'base::~base' : cannot access protected member declared in class 'base' [/Code] [Code] cl...more >>

Hello everyone, I think in built-in C/C++ functions, there is no direct function call to trim heading and trailing space characters, right? So, we have to implement it manually by iterating the string to check character one by one. Support not using MFC. thanks in advance, George...more >>

The Image class allows loading a bitmap from a graphic file. So far I've gotten it to work with JPG and BMP files. What other graphic file formats are supported in this way? Is this fixed based on the .NET Framework used (e.g., the Image class defines which formats can be used), or can diff...more >>

I have a C++/CLI library and I'm calling a function, RegisterTraceGuids() that takes a function callback as a parm. I need the callback function to be a managed delegate. In order to do this I create a pin_ptr of the delegate and then pass it to RegisterTraceGuids. The problem is that pin_...more >>

I want to create a clock that will countdown the number of days left to = a certain event. I want it to show, days, hours, minutes and seconds. If = possible I woud like to make it a floating form or if possible to show = in the task bar, is this possible to do and were could I find something = ...more >>

Hello everyone, Just interested to learn how C++ implements delete this statement internally. From logical point of view, I can not imagine how to implement a component which destroy itself. What makes me confused is the component is relying on itself even in the process of destroy, ho...more >>

Hello everyone, From MSDN, http://msdn2.microsoft.com/en-us/library/ms682583.aspx parameter fdwReason of DllMain has four values, DLL_PROCESS_ATTACH DLL_PROCESS_DETACH DLL_THREAD_ATTACH DLL_THREAD_DETACH I think we could simply understand what MSDN described about the four values...more >>

Hello everyone, I have noticed a lot of COM samples that the function AddRef and Release function of COM inteface is not synchronized to make it thread safe when dealing with adding/decreasing reference count. Is it needed to synchronize AddRef and Release? Or the COM runtime underlyin...more >>

Hello everyone, What is the purpose of virtual destructor? If currently, no derived class? thanks in advance, George...more >>