According to MSDN2, if a managed class throws an exception in the constructor, the destructor will be called. If an exception is thrown in the constructor the object never existed so how in the world can the destructor of a object that does not exist get called! Here is the MSDN2 document: ...more >>

I am receiving a compile error when attempting to include Directshow in a managed C++ program using Visual C++ 2005 Express Edition Version 8. The ..NET framework is version 2.0.50727. To recreate the error, do the following steps in Visual C++ 2005 Express Edition: 1. Create a new Windows ...more >>

Hi everyone.. I was trying to implement callback fucntions in native codes in my VC8 class, and referred to some online codes which use native class nested within managed class. basically of the form, __gc class CManagedClass { __nogc CNativeClass { //blah blah blah...more >>

When I add a new line in my VC++ application, the editor is really slow to add the new line. Is there a configuration setting I can use to speed up line add's? Thanks. -Mike ...more >>

I have a series of assemblies which used to be unmanaged code and have now had the /clr switch thrown on them to create managed code, but using win32 types etc rather than Safe CLR code. How much of the .Net security facilities can be applied to this code? Thanks Colin...more >>

Hi someone plz help me. I have made a dll in VC++ .NET using following specifications extern "C" { __declspec(dllexport) void Probe_Interfaces_Local() { //some code } } i compiled it successfully and add the dll formed to another...more >>

I have just loaded my VC++6 projects in Visual Studio 2003. It converted the project files just fine. I have a MFC dll that links against a WIN32 dll. In the WIN32 dll, I have exported some functions (not classes). But now it won't link any more (Teh projects works file in VC++6). The MFC ...more >>

Hi The C code (not C++) below (test.c) generates a warning: #include <stdlib.h> int main() { const char** a = (const char**) malloc(1*sizeof(const char*)); a[0] = "boo"; free(a); return(0); } If I compile above with MSVC 7.1: I:\tm...more >>

Hi someone plz help me. I have made a dll in VC++ .NET using following specifications extern "C" { __declspec(dllexport) void Probe_Interfaces_Local() { //some code } } i compiled it successfully and add the dll formed to another C...more >>

I have a C++/CLI interface IPlugin in one assembly (a windows service) that is inherited and implemented in another assembly (dll) by a class CPlugin. I want to be able to create instance of this class dynamically at runtime, so I load the dll assembly using Assembly^ assembly = Assembly::...more >>

I am working on converting a win32 console application from VC6 to VC7. My version is Microsoft Development Environment 2003 version 7.1.3088. The code works fine on VC6. it is a console program for scientific computation, so it has nothing to do with MFC. But it needs some other libraries s...more >>

I have some problems using conversion operators in C++/CLI. In my project I have two ref class:es Signal and SignalMask and I have an conversion function in Signal to convert Signal:s to SignalMask:s. The reason is I have a free function called WaitSignal that accepts av SignalMask where Signal...more >>

I moved from VS2003 to VS2005 I use the conversion functions from the 'atlconv.h'. Since I use the VS 2005 I get the unresolved linker error ATL::g_pfnGetThreadACP. Anybody know in which file or library this function are defined? Thanks Thomas ...more >>

Hi, I wrote some network n multithreading code in pure c++, my exe compiles with only 9k. But it requires msvcp80.dll & msvcr80 dlls to run on a different machine. I want to build my exe such that I dont have to provide these dlls with my exe. I know that size would increase but thats not a prob...more >>

In my program I tried to update a edit control's text very fast, but It seems there's no time to update it. Following is my code. IDC_EDIT1 is a edit control; //*************************** CString strTest; for(int i=0;i<10;i++) { strTest.Format("%d",i); CWnd* pwnd=GetDlgItem(IDC_ED...more >>

Hi, I have a requirement to compare 2 ASCII text files and show the results in an aspx form. The comparision algorithnm, out put should be similar to VSS (differences between 2 files). I really appreciate if you can tell me the best way of doing this and what web controls suits this requir...more >>

We just switched from vs 2003 to vs 2005. We have a large number of projects in the solution. So to make it easier on everyone we use file references instead of project references. The biggest issue so far that I have with 2005 is that if file references are used then the "Go to definition" comm...more >>

How can I get the Windows XP look and feel in Visual Studio C++ 6 and in Visual Studio C++ .NET?...more >>

All - I am facing couple of problems with events in CLI C++. If i have an interface that declares few events, and a ref class implements that interface, should it do anything extra from events perspective? interface class IMyClass { public: event MyDeleg^ MyEvent; } ref class My...more >>

Hello, I can't use STL class 'ostringsstream' in an VC++.net project, because compilation produces the following error: Microsoft Visual Studio .NET 2003\Vc7\include\ostream(243): error C2039: 'failed': no element of 'std::ostreambuf_iterator<_Elem,_Traits>' with [ ...more >>

I'm having a problem with a derived class. When a copy is made of the object it does indeed copy the additional member variables of the object but it does not seem to be copying the members of the base class. I have a class that is derived fom Cwnd, as follows: #pragma once #include "Bitm...more >>

All - As we all know, Dispose method is reserved in C++ 8 and the expected syntax is to use ~MyClass(). In 1.1, we used to have following structure for Dispose [Code illustrated in C# for brevity:-)] class MyClass : IDisposable { public void Dispose() { Dispose(true); GC.Supressxxx(th...more >>

This is related to my last post “Should templates be included in pch files?”. After searching for more information on C1055 I found several mentions of __LINE__ causing this to happen more often. Is there any truth to this?...more >>

Hey, I'm trying to use the connect to database wizard to connect to a MySQL database on my web server, 66.235.193.45 (I'm actually not sure if that points specifically to my part of the server, if not, the domain that goes right to is is www.freddyswebgraphics.com, which I have tried as well), ...more >>

Hi all: I call windows api LoadLibrary(), it returns error code : ERROR_NOACCESS 0x3E6, why is it failure to call this api? how to fix this problem? B.G. Vic ...more >>

I thought that including template headers such as <vector> in the pch is not useful. Templates can’t be compiled without the template arguments so there is no way to pre compile them. Is this true? Also, it seems that this could actually be bad since it will significantly increase the...more >>

Hi, I've got a simple vc++ program that basically just runs a daemon in the background and sends update messages to a logfile as it goes along. What I'd like to do is see these log messages also displayed in a window - either a dos window or a 'proper' window with a text field etc... I can ...more >>

Hi to all I am getting a problem while running my application complied in Visual Studio .NET on Winnt Problem: i got message: The procedure entry point GetMonitorInfoA could not be located in Dynamic dll USER32.dll (GetMonitorinfo (GetMenuinfo, GetMonitorinfoA)) as i run my appl...more >>

Hi all, I once had a function in which I could not set a breakpoint. VS VC++ .net 2003 7.1 (native c++) would crash. This particular function had about five arguments. Each argument was an STL container of some sort. The "expanded" name of the function (with all templates written out) was ...more >>

Forgive me for re-posting this...in the first post, I replied to myself, and the self-reply may having sounded like I found the problem, but it was actually a correction. ----------------- I have a very strange problem trying to link the debug version of my caller application with one of...more >>

Hi. I'm trying to migrate a small library to VC8 via the wizard, but when I try to compile I get the following errors: Error 1 error LNK2001: unresolved external symbol "?.cctor@@$$FYMXXZ" (?.cctor@@$$FYMXXZ) AssemblyInfo.obj Error 2 error LNK2001: unresolved external symbol "?.cctor@@$$...more >>

I have a very strange problem trying to link the debug version of my caller application with one of my DLL's using .NET 2K5. The linker declares the following error (one of many): error LNK2001: unresolved external symbol __imp_?MyExportedObject@@YAXW4MsgCategory@@PB_WK1@Z When I pe...more >>

Can I define a template class as following #pragma unmanaged #include "mybaseclass.h" #pragma managed namespace mymanaged1 { namespace mymanaged2 { namespace myunmanaged { template<class T> ...more >>

Its a COM dll that i generated and tested using debug configuration .....but now its about to be dilevered and as i try to convert it into release config. removing DEBUG flags , its really doing me a lot lot trouble ,...the link errors ExportDevices error LNK2019: unresolved external symbol...more >>

Dear all, I've got a problem to set my application in the status area so that I can receive application message while the window is minimized. Just put my icon beside my input method in the right corner of windows. Is it possible to do it with win32 api? If so, which one shall I call? Loo...more >>

Hi, Lets say I have a method called "listen_proc" inside "class1". There is another method called "start" in the same class that has to start the "listen_proc" inside a new thread. I am using CreateThread but I cannot manage to pass the right function pointer, the compiler keeps on giving error...more >>

I use Firefox as my browser. As a result, I'm banned from getting Windows Updates. This seems a bit monopolistic on MS's part, and it means if there is a security problem or a VS C++.NET 2005 patch needed, I'm out of luck. This seems wrong to me... BTW, I do have IE on my system, but it wo...more >>

That is: In AssembyInfo.cpp I've wrote [assembly:AssemblyVersionAttribute("1.5.3.0")] But after compile in dll properties window there is no Version tag. Does anybody solved this issue? Maybe there must be something mentioned in compiller tags or so on? Thanks, Me. ...more >>

In VS/VC 2003: Simple question: for the Custom Build Step for the project (right click the project in the Solution Explorer, select "Properties", select the "Custom Build Step" in the "Configuration Properties" tree at the left, then select "General" under "Custom Build Step"), what is the ...more >>

Hi, i am working on a small MFC dialog based application. a number of controls belongs together and i want to enable / disable them together. i thought i'd use a group box, just as you'd do in a C# application, but i just can't find any way to use the group box as anything other than a d...more >>

I have an existing COM component written in C++ that does some Windows account management stuff. We're moving to Active Directory and rather than change the whole application, the only changes required are to the COM component. I want to move the functionality of the COM component to a remoted C...more >>

When we use Visual Studio in beginning C++ classes, we routinely follow the scenario below. Create a Win 32 Console Project (empty). Add a C++ source code file to the project. Enter code (simple example below). #include <iostream> #include <string> using namespace...more >>

Hello Everyone, I am extending a legacy app that will load DLL's dynamically. I've worked out how to call C# DLL's from a mixed mode DLL. Now I thought I'd delve farther into IJW and mixed mode by trying to re-create the C# DLL in MC++. I added a Win Form to the project. Now I want to c...more >>

I am using VB.Net 2.0 and I am completely new to the concept of implementing interfaces. Can anyone explain "implementing interfaces" to me and perhaps give me an example of implementing an interface that would help me implement the IIneternetSecurityManager interface mentioned under "Creatin...more >>

I have an ATL DLL that hosts a COM object. Without managed extensions the object compiles and works fine. Now with some assistance from Will DePalo (on a different thread in this group) I figured out how to add CLR support to my object and how to call into managed code. The code and the calls ...more >>

Can't call WriteProfileInt -- I get undeclared identifier. If I #include <afxwin.h> -- and declare it in my .h -- I still get unresolved external. -- Need to write to ini, don't want to write to registry -- WriteProfileString works fine though. ??? Thanks....more >>

Hello Everyone, I'm trying to just play with managed VC++. I just want to draw a box on the form when it is clicked. Here is my click event handler System::Void Test_Click(System::Object^ sender, System::EventArgs^ e) { // Create a Graphics object for the Control. Graphics* g = thi...more >>

Hi, I am writing a Win32 DLL. I want to be able to handle any SEGVs (segmentation violations) gracefully, by using an error handler of sorts. Currently, if a user of my DLL (typically a VB programmer) passes a null (or invalid) pointer to my library - the entire application crashes, leav...more >>

Hi all, In managed C++, can I overload the operator [] to access data members in the following way Create object objTime; seconds = obj["Hour"]["Min"]; or seconds = obj[12][45]; Thanks Mohan ...more >>

Hi, I am working on a legacy code. Following is a line of the code which complies with Visual C++.NET 2003 but not with Visual C++ 2005: for ( int i = 0; i < (const)(X.size()); i++ ) {}// X is an object such as a standard Vector Compile error with Visual C++ 2005: error C4430: missing ty...more >>