Hi, I am sending windoew message from a c# application to c++(unmanage) application using this code System.UInt32 rm= RegisterWindowMessage("12345"); System.IntPtr ptr=(IntPtr)HWND_BROADCAST; PostMessage(ptr,(int)rm,5,5); PostMessage(ptr,WM_AAA,5,5); but the c++(vc-6 mfc) dont catch t...more >>

The project that I am on is going to require me to mix managed and unmanaged code. I created a vc++ class library (.net) project bane TestLib. I inserted the following test code in testLib.h. The code came from the MS example on mixing managed and unmanaged code. When I build the project, I g...more >>

One can specify an event as either the raw event: __event System::EventHandler * OnSomethingChanged; or as a series of add_,remove_, and raise_ methods: __event virtual void remove_OnSomethingChanged(System::EventHandler *); __event virtual void add_OnSomethingChanged(System::EventHandler ...more >>

I have an app that represents ShellFolder Items as a visual element (listview item, etc). The code correctly performs Drag&Drop operations EXCEPT in the case when the item being dragged is from a Virtual Folder. The problem is that the DragSource is my app, not the Virtual Folder, and therefore...more >>

Thanks in advance for answering this question....more >>

Hi, I am using Microsot Web Browser control in a VC++ (.net) desktop application (Windows forms application). How do I make this control transparent so that if I have any other control like Textbox under the Browser control, it is made visible (after making the browser transparent). -TIA- ...more >>

I am trying to write a program similar to "ping".Like the example provided in MSDN,I call setsockopt function to set SO_RCVTIMEO value for my raw socket.And before I make a call to recvfrom,I call getsockopt to ensure that the value ihas been correctly set,and it has.But recvfrom does not retu...more >>

Hello Developers, I have developed Server and Client applications that are communicating by TCP/IP sockets. My application is developed on Visual C++ .NET Standard v2003 Windows Forms. When one of the program is closed unintensionally, other is automatically trying to re-connect. But, wheneve...more >>

Hi Guys, Would you be able to help me using C# GUI (with user interface component) in my MFC application. I have used managed extension, COM-interops, etc but problem is this C# component has user interface. how should have get window handle from managed windows? Thanks in advance. Sush...more >>

Avoid "Program Database for Edit & Continue" in VC 2003! This option made me think I'm in Twilight Zone! The code behaves as not intended, the breakpoints in the debugger get skipped, the only positive thing about it is that the error is repeatable. Consider the following code snippet (it ...more >>

I'm trying to write a utility to export user certificates without user intervention. I found a function CryptUIWizExport that should do the trick but it does not appear to be defined in the cryptuiapi.h header file even though the documentation states it should be. I have tried creating my o...more >>

I am testing VC++ 2005 and I get this warning: "warning C4996: 'strncpy' was declared deprecated" Does that mean that they might be phased out in VC++ 2006 or higher? Or does an alternative function exist as replacement? ...more >>

Thanks. ...more >>

Hi, I'm trying to write a program for Smartphone 2003 device bu eVC++ 4.0. The interface consists of couple of buttons ( i used pushbutton type), when you press the button, the program start to implement. But I want to add on another button which do the job of stopping the first one if presse...more >>

Hello out there, is there any possibility for me to catch or avoid crashes caused within unmanaged code? The situation: I'm writing a managed wrapper in MC++, and in there I use some unmanaged COM methods for creating thumbnails. The problem: One special line may cause a crash, and subse...more >>

Hello, I never practiced C++ development in VC++.net before. (only Unix) what does the error: d:\C++\UMath\UAlgebra.cpp(71): fatal error C1010: unexpected end of file while looking for precompiled header directive mean ?, and how do I fix it ? Thank you !...more >>

Hi, What is the best case for accessing managed code from unmanaged C++ code, considering that the unmanaged code doesn't have managed extension? Please reply. Thanks in advance. Regards, Hyun-jik Bae ...more >>

Hi, Is there any way to add my own attribute to unmanaged C++ code? For example, [MyOwnAttribute(id1,id2)] int Foo(void* a,int b); I searched for web and guess that attribute provider or something is related to them, but I am not sure. Please reply. Thanks in advance. Regards, Hyun-ji...more >>

I am new to VS.C++ and am having a hard time when i have to share data between managed and unmanaged code. For example, I need to read binary data from a file and then call an non-CLR dll function passing the data that was read as a void* below is a snippet of the code that i have written in an ...more >>

Hello. After I converted my .net code to the new VC2005 syntax I started to get C4490 on my ExpandableObjectConverter subclass overrides. The GetProperties method is no longer called by the PropertyGrid when I use my subclass as a type converter. Can anyone tell me what has changed? What...more >>

I am using Microsoft (R) C/C++ Optimizing Compiler Version 14.00.40121 for AMD64 to port a dll (C, C++ and fortran files) for WS2003. I am working with VS2003, with customized paths in Tools > Options > Project > VC++ Directories in order to correctly target the compiler executables and associ...more >>

I'm writing a Windows Forms application in C++.NET. I've defined function F which takes 2 arguments a & b. I need to use the pointer of F inside another function G & I can't figure out how to do it properly. Here's what I have : U32 (*pf) (HANDLE, LPVOID); //declaring the function pointer ...more >>

Dear All, Many old C standard library is useful for string operation such as strcpy. But I meet some problem, a managed char array which declared in a structure and this structure has a instance declared in a__gc class. Sample code as following, namespace Configure { using namespace Syste...more >>

Does VC 7.1 support template specialization and partial specialization ? ...more >>

Hi All, i have some (3) different weird pointer problems that have me stumped. i suspect that the compiler behavior is correct because gcc shows the same results. ---------------------------------------------- //example 1: typedef int t_Array[10]; int _tmain(int argc, _TCHAR* argv[]) {...more >>

Hello, I noticed an unexplained (for me) behaviour while wrapping unmanaged virtual methods. This is the test situation: An unmanaged class has four methods defined DoIt1 .. DoIt4. Each method just returns false. DoIt3 and DoIt4 are virtual methods defined in the base class MyBase of ...more >>

You guys are going to like this. I work on a very large (500,000 line) native C++ project. VS started crasing recently and I've similified it down to fifty lines (took me six hours). Why is the debugger crashing? Microsoft Visual C++ .NET 69462-270-0000007-18536 Steps to reproduce: ...more >>

I have a Windows Forms.NET project & am modifying the GUI in Form1.h[Design] . I click the Form, go to Properties, click the Icon Property, & change it to the .ico file I want. It accepts the change & shows me a thumbnail of the image in the Properties tab, but when I compile I get a "C2039: 'G...more >>

I've got a C++ DLL that I'm trying to pass a value type into by reference. My C++ class looks like: public ref class Class1 { public: System::Boolean DoSomething(System::Boolean &b) { b = !b; return True; } }; My C# code (that won't compile) looks like: B...more >>

Is it possible to use "normal" C types with garbage collection? Here's the function I'd like to write, but not have to worry about deallocation: char* ConvertStringToChar(String* pString) { const wchar_t __pin *pStrChars; char* pOutString = (char*)malloc(sizeof(char) * 256);...more >>

Hi there, I defined a class template (MyClass) and some member variables and functions, as following: template<class T1, class T2> class MyClass { ... struct m_variable { ... }; m_variable* MyFunc(m_variable* pv1, m_variable* pv2); ... } template <...more >>

I have a C# class that I wan't to be able to use in VB6 and VBA applications. To do this I was trying to use a mixed managed VC++ dll and export a function. Doing this I get an error "The memory could not be "read"". Can any one explain what I am doing wrong? This is my Code. ..CPP ...more >>

Hello, I'm not quite sure if all objects in my code are released properly by the garbage collector, because under some circumstances (I didn't figure them out yet) I encounter sometimes a System.OutOfMemoryException. It would be nice if someone of you could tell me if all the memory is fre...more >>

Hello I'd like to write a Generic class that use a pointer to the generic structure. I can't do this unsafe public class PClass<S> where S : new() { public S* pData; public PClass( ) { pData = (S*) ..... } } Nor public class P...more >>

Dear All, I am trying to use CDatabase class and include the class <afxdb.h>, but the following error occurs, Linking... nafxcwd.lib(afxmem.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in libcpd.lib(newop.obj) nafxcwd.lib(thrdcore.obj) : ...more >>

I am writing a container class so that I can reuse my double ended list code. I have a base class CListBase that handles inserts and deletes with a member function addItem, defined as: template<class T> class CListBase { CListBase<T>::CListBase(); virtual CListBase<T>::~CLis...more >>

quick question for anyone who can help...im trying to mak a program that will take an entered username and store a list of teams they chose from a list and save that, to be called later. does anybody kno what i should save this list as? thanks...more >>

I cannot believe how convoluted it is to export function templates and class templates from a shared library (or DLL as it is called in the Windoze world). Micro$oft support for STL and standards in general is absolutely appaling. This is absolutely ridiculous. I have obtaind links from p...more >>

When I build some add-ins for the management console using C++, the add-ins made by me show a Win2000 interface while the rest of the add-ins made by MS are using XP themes. What am I missing? Cheers ...more >>

Hi, I have a function that has a variable no of arguments (note! function shortened) myfunction(int someID, ...) { va_list args; va_start args, someID; FormatMessage(......, &args); va_end(args); } PROBLEM: formatMessage wants a pointer thus, 'va_list *Arguments...more >>

I'm using Microsoft Development Environment 2002 Version 7.0.9466 on Windows XP Professional Service Pack 2. If I compile the following code at maximum warning level: #include <functional> class SetValue : public std::unary_function<int, void> { public: explicit SetValue(int& value) : m...more >>

Hi, i originally posted this via another portal, but after giving it time to propagate it still hasn't shown up. My apologies for the multiposting. This might be a very simple question, but i am still getting my head round this stuff. I have a mixed mode dll. In it i have a managed class w...more >>

Could anybody point me to some resource about how to call a VB.net DLL in VC.net? Thanks in advance. Al ...more >>

I googled and found a half-dozen good threads on debugging C# / VCPP on a machine with both tools installed. But my co-worker and I haven't figured out how she can debug her C++ code on her computer when her DLL is called from my C# GUI .exe program. I have the full MSDN Universal toolset, b...more >>

Hi, I would like to have a tip about this kind of warning, what should I do get rid of that warning? LINK : warning LNK4243: DLL containing objects compiled with /clr is not linked with /NOENTRY; image may not run correctly The project is a .NET C++ DLL in managed code. Thanks a lot!...more >>

dear all, i have two .lib files, but i dunno how to include in my compilation in vc.NET... also, is there anyone has used IBM MQ before? i dunno how to connect all its library... dunno why worldman~ ...more >>

#include<iostream> #include<cstring> using namespace std; void quicksort(char *num,int len); void qs(char *num,int left,int right); int main() { char num[]="3,7,3,6,7,9,5,4,1,7,8,90,5,334,54,213,78"; cout<<"Original: "<<num<<"\n"; cout<<"sorting......"<<"\n"; quicksort(num,nu...more >>

I am looking for advice on best practices. I am coding against a digital camera SDK. One of the callback functions returns the large, multi megabyte images in smaller chunks. Some of the images will be JPG, others will be RAW. GUI is C# Middle layer: MC++ Digital Camera SDK: UMC SDK ...more >>

Can anyone please help me figure out why all of a sudden (even after many restarts of Visual Studio 2005 and reboots, etc) I am no longer able to set breakpoints in the disassembler window. I should mention that this is assembler code I generate by writing opcodes to memory, but for a month o...more >>

I'm using the OpenFileDialog class in my application and this changes my current working directory (cwd) when a user selects a file to open. Using MC++, how can I store my cwd into a String and then restore it after the call to OpenFileDialog? Thanks, Gary...more >>