Hi there, I've been working with dynamic libraries for a quite big software and now and then I may get some weird linking errors, like following MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: _fprintf already defined in libcmtd.lib(fprintf.obj) MSVCRTD.lib(MSVCR71D.dll) : error LNK2005: _swpr...more >>

Hi i am relatively new to the c++ visual studio.net 2003/2005 evniroment. I am wondering why all the c++ code for winforms apps are being placed in a .h file. Isnt this against c++ coding convention ? I understanding it makes no functional difference to the end result, but arent .h files...more >>

Hello, I've just started programming with C++, and I'm looking for a way (function) to convert numbers (int,float or double) into ASCII. Thanks...more >>

Hi, Introduction: ************************* I am developing communication infrastructure for a streaming video server, to achieve optimal performance I use IO Completion ports & a thread pool in combination with winsock MsAPI ( e.g. ConnectEx, AcceptEx, … ), sending data through sockets...more >>

Hi, I have written a simple test harness (exe) for a C++ (native) DLL that exports some C++ objects. The objects throw exceptions when they an error occurs in the Ctor, and the test harness is supposed to catch the exception. I have noticed that when I am debugging the DLL (i.e. using th...more >>

Hi, I have written a test exe that uses a dll (DDL_1 say). This dll, also calls upon another dll (DLL_2 say). I have the source for both dlls. I want to be able to run my exe and step through DLL one's code and then step from there into DLL two's code. I have my project settings as ff: ...more >>

Hello, I have an old project, built with VC++. Now need to be compiled in Visual Studio .Net 2003. The project is going to build a DLL. When i try to compile the project, i got the following errors: c:\thepath\aaa.cpp(890): error C2065: 'm_nBackStyle' : undeclared identifier c:\thepath\...more >>

I create 2 ManagedC++ class inherithing from each other. I can't see how do I call super destructor or ensure it's called :-/ template <class T> public ref class CArray : System::IDisposable { protected: ~CArray() { if( ptr ) // I'm not sure of what IDisposabl...more >>

Hello , I meet some data convertion problem, the sample code as following, namespace Configure { using namespace System ; typedef struct _SW{ char szVersion[64] ; } SW,*PSW ; public __gc class Config{ public : SW m_sw ; public : Config(char *szVersion) { Config __pin *This...more >>

I want to mix Uniscribe with GDI+. Unfortunately, if I want to render Glyph per Glyph I have to use ScriptTextOut which uses an HDC. So I would like to know if there was a way to apply coordinate transformation to HDC the same way you could Apply a Matrix to a Graphics object? I remembe...more >>

Greetings, std::wstring s(L"hello world"); wchar_t c(L'x'); size_t i = s.find(c); The assembly view of the above code shows that the call to s.find() is actually a call into mscorwrk.dll which then calls the basic_string template find() code. Why is it going through mscorwrk....more >>

Hello, All! One of our target platforms has only 32 MB of virtual memory (Windows CE), so we decided to explicitly load some of our dlls. But the classes created inside such dlls are created with vfptr pointed to address space of the dll. So when DLL is unloaded vtable is destroyed. The...more >>

With Visual C++ 2005 beta 2, I get the below compling error for the following code. I think this error is not acceptable to me because int::typeid is a constant and is known to compiler when compiling. Will VC++ 2005 implement switch with case int::typeid in the final release? error C2450: ...more >>

I have a program written in MFC. I'm at the point where I need to start working on the major release (tons of new features needed - new fiscal year budget and all-). I'm looking into vc++.net since I figure that I need to buy the bullet already and get into the .net thing. I'm concerned, howev...more >>

Dear Experts, I have a project, built long time ago, using VC++. Now i want to compile it in Microsoft Visual Studio .Net 2003. When i tried to open the project file(xxx.dsw), i was asked: ------ The project 'xxxx.dsp' must be converted to the current Visual C++ project format. After it h...more >>

Hi All !!! Can anyone give me link to the C++ source or to the compiled program unit (compatible with Microsoft VC++), designed for the solving of the algebraic linear systems with rare matrices ? The main problem is next: the main rare matrix of the system is in the common form, but not in...more >>

Can u help me to design and code a button that can open IE with only one "Default Web Site". This enhancement I want to do for VC++.net application that is multithreaded and using win32 interface....more >>

Hi, All: I have to use two packages from other people. One uses LIBCD.lib, one has to ignore LIBCD.lib. So now I can't build successfully. Any idea what I should do? thanks, -Kay ...more >>

I'm trying to use GDI+ fisrt it tooks me 1/2 an hour to realize that #include <GdiPlus.h> was failing SILENTLY as a matter of fact #include <kgdsfjrehgkjrehglierdjhglkrdhgkjfdhgdehjkrefhkj> fails silently as well! I'm using a default ManagedC++ template what kind of stupid default option ...more >>

#include<iostream> using namespace std; class MyClass{ public: int x; MyClass(int i); } MyClass::MyClass(int i){ x=i; } int main(){ MyClass ob(5); cout<<ob.x<<"\n"; return 0; } ...more >>

Hi, Does anyone know the efect (if any) of choosing a platform of type Active(Win32) as opposed to plain Win32 when creating a new C++ (native) project? Thanks ...more >>

HI, below is a piece of code. HWND hVWnd; RECT rRect; GetWindowRect(hVWnd,&rRect); diff_val = rRect.bottom-rRect.top; If on starting a application if my window is minimized then value o rRect.top and rRect.bottom is -32000. Is it a garbage value or any valid error code? Onc...more >>

I'm working in ManagedC++ In the OnPaint of my control I get a System::Drawing::Graphics object to which I apply some transformation (Scaling, smoothing mode, clipping and so on). Later on I need to call a function of the #include <GdiPlusFlat.h> API. How do I get a "GpGraphics*" from a...more >>

In my managed C++ code I would like to call the GDI+ text function directly. I'm refering to this document: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/GDIPlusreference/flatapi.asp Which tolds me about a <gdiplusflat.h> header. However, although I have VS.NE...more >>

I try to use the auto_ptr in my code but that doesn't work. even std::auto_ptr. I guess I have to add an #include statement, but I can't figure out the right file to add. Also I want to use auto_ptr not to manage a single int but and int array. something like std::auto_ptr<int> adv = new in...more >>

due to cross reference I need to separate declaration and implementation. in my header I have something like that: --StyledRange.h-- generic <class T> ref class StyledRange; generic <class T> public ref class StyledItem { StyledItem(StyledRange<T>^ r, int pos, int len); } --StyledR...more >>