Hi again, Maybe I missed something, but I cannot do a forward declaration in managed C++. By doing: namespace Namespace { public __gc class A; // forward declaration public __gc class B // B class, that uses A in constructor { public: B(A* a) : mA(a) {} private A* mA; }; pub...more >>

I'm attempting to retrieve specific versions of a row's column in C++ (this works fine in C# - apart from the syntax) // by column number row->Item[2, DataRowVersion::Original]->ToString(); // or column name row->Item[S"FirstName", DataRowVersion::Original]->ToString(); However, both of th...more >>

Hi there, I'm trying to compile the program with Whidbey but I got the following problem: ------- cut here ----------- c:\h>cl h.cpp /clr [many warnings skipped] h.cpp(152) : error C3396: 'System.Runtime.CompilerServices.IsImplicitlyDereferenced' : custom attribute not found in 'mscorl...more >>

Hi, I cannot get this code to work. All I want to do is to fetch 'which' toolbar button was clicked, so I can act on it... private: System::Void toolBar1_Click(System::Object * sender, System::EventArgs * e) { int index = toolBar1->Buttons->IndexOf(dynamic_cast<ToolBarButton *>(e->Button...more >>

First off, the sympathy is for all you poor buggers out there who have to figure out how to marry Managed Extensions for C++ onto your legacy code. My condolences; my brief experience with the process leads me to believe the Microsoft hates all of its VC++ developers :) Now, the question. I'm g...more >>

I can't seem to get this to compile... (Perhaps I'm missing a header file) std::string htmlMsg; std::istringstream iss(htmlMsg); error C2065: 'iss' : undeclared identifier This is a c++ console application. ...more >>

#using <mscorlib.dll> What is this actually doing in my code? Is this like including mscorlib.h and linking with mscorlib.lib? ...more >>

Hi All, I have VS 2003 and I was wondering is it possible to create pure C++ apps without the .net being injected into the app? Are alot of you guys building aps in C++ using .net ? How about web apps? How do you like using VC++ in .net? What are the pros and cons of VC++ in ..net?...more >>

All, In an inherited managed c++ class, how do you call the contstructor of the parent class? I tried with the usual Parent::Parent(...), but get compiler error C3257. Any ideas? Thanks, Duncan. -------------------------------- From: Duncan Aitken ----------------------- Posted by a u...more >>

Hi, I have a "legacy" system (namely, vst audio plugins) which calls me through a mixed-mode, managed c++ library with a call similar to : void process(float *input,int inputLength) inside this method, I'm trying to find a way to instanciate a managed array (System.Single[]), which would ma...more >>

hi guys, i really need your help!! i want to add a toolbar with some push buttons in which i put some icons. it works without including <windows.h>. However, i really need this library so i dont know what to do. HELP ME. i get this error: d:\Generic Control\SMACT\Form1.h(473): error C2039: 'G...more >>

Post a new message to microsoft.public.dotnet.languages.vc http://www.dotnet247.com/247reference/default.aspx Hello, I've been struggling for weeks with this problem, I hope I find some help here... To start, in our company, we have a large existing c++ project (native code, unmanage...more >>

For the following code interface class I{}; public ref struct R1 : I { R1(R1%){} R1(){} }; generic <class T> // if you replace it with template, it works. void f(T t) { I ^hi = t; // error in this line } int main() { R1 ^obj; I ^hi = obj; f(obj); } t.cpp t.cpp(11...more >>

Hello, I am developing a managed c++ library which loads a regular win32 dll. The library will be used by .NET consumers. Am I correct in saying that the win32 dll will not be unloaded until the garbage collector destroys the mc++ library that loaded it in the first place? And does this m...more >>

Is this a bug in the for each loop or am I coding something wrong (or is this how its suppose to function and I don't understand how an array property and the for each interact [this is always a possibility :)] The commented out code is the problem area as it generates the error: ->for each...more >>

I made a sample service in C++ and installed it with myservice -Install Now I want to remove it, tried myservice -Uninstall Definitely not working. What is the correct remove option parameter? -- Johan ...more >>

This has got to be something really simple, but I'm pretty baffled...[VC++ ..NET 2003] In the header file I define the class interfaces, in the CPP file the class functions, and the CPP file #includes the header file. Looks like Stroustrup style code. The only way I can get it to complil...more >>

Hi, I've been trying to use Visual C++.NET, but whenever I try to build a solution I get this error message, fatal error C1108: unable to find DLL: 'alink.dll' Does anyone know what causes this error and how I can fix it? Thanks in advance. ...more >>

Hi, Does anyone know how to change the file's short (8.3) name? I cannnot find the way anywhere including MSDN. I know how to get the long name and the short name of the files. (using GetLongPathName() and GetShortPathName()) Unfortunately, what I want to do is not to GET the short file n...more >>

Hi, why use '_tmain()' as entry point of the program in a console-application ? why is _tmain() used instead of main() ? _tprintf() instead of printf() ? why '_t' ? thnx Chris ...more >>

Hi, I have a mixed dll which exposes some managed classes which themselves *internally* make use of some standard c++ library templates (like string and exception). The problem I'm having is that when I reference the dll in my VB.NET project, it seems to have brought along these templates ...more >>

Hello, If you start a new c++ .net project (windows form) the IDE shows window and generate 2 files (.cpp and .h). If I simple drag and drop button control into the form and double click the button, the IDE shows me a method "template" where I can write my code. I wonder why the IDE creates th...more >>

Hello can someone tell me how to save sound files and how to use them in a program. ...more >>

The /Fx option does not seem to produce any mrg file in VC++ 2005 beta. I created identical projects with 2003 and 2005 and activated the "Expand Attributed Source" option from the project property page. It works fine with 2003 but not with 2005. Can I assume that an event declaration expan...more >>

helo, I'm new to VS 7.1, searched thru help but no luck. Anyone can tell me a keyboard shortcut to go to the ending bracket when cursor is under opening bracket and vice-versa. I think there must be something like this b/c I see the matching brackets getting bold for a second while writing the...more >>

Hi! I have a newbie question regarding void*. I am reposting this since I am still not clear. In native C++ you can have a function that takes a void* and you can call that function with pointer to array or any other kind for that matter. Here is an example Foo(void*); // You can late...more >>

Hello, I have a class with three overloaded indexed poperties. Declaration in *.h __gc class ByteArrayN : public FArrayN { typedef BYTE T; typedef ByteArrayN FTArrayN; . . __property T get_At(int ind1); __property T set_At(int ind1,T value); __property T get_At(int ...more >>

Hi, I'd like to know if it makes sense to define an event in an interface. Something like: public interface class MyInterface1 { event PropertyChangedEventHandler^ PropertyChanged; } ; In particular, what will happen if a class derives from two interfaces defining events having th...more >>

Hi! I am new to Managed C++ and am working on my first project with this. In native C++, we could have a function that takes void* and call that function with any type. Is there a way to do that with MC++? If I had something as follows in native C++, Foo(void* arBuf, int nSize); And ...more >>

Is there any way to detect the Windows version at run time using .NET? -- Ioannis Vranos...more >>

Hi I have taken the liberty to cross-post this. It appeared on c.l.c++.m but the ICE is regarding VS.NET 7.1 C++ compiler. post follows: ============================================== John Torjo wrote: > > Thus, I suggest you send the smallest example that fails to compile > (or a ...more >>

Hi, Does anyone know if it's possible (and if so, how) to intercept presses on 'multimedia keys' you find on keyboards? Curiosity more than anything. Only manufacturers seem to put their own random gubbins onto their keyboards, so presumably there isn't any kind of standard. Obviously their ap...more >>

I'd like to write a DLL in C++ which does text file IO. I plan to be using the VS .Net Dev environment, but I want the DLL to work without ..Net runtime on the machine. If I understand this right, that means I want my DLL to be compiled as "unmanaged" code. I would really appreciate a simp...more >>

Any idea that I can convert a value of type Decimal or String into Hex value in MFC VC++.NET? I know there is a function hex(std::ios_base&), but I don't know how to ultilise it in MFC as I only know in console mode. TQ Michael. ...more >>

Another same issue on "NullReferenceException" :- I have an (exe) executable program created in VB.NET 2003 that calls to a MFC DLL written in VC++.NET 2003. I always get an error msg "NullReferenceException: Object Reference Not Set to an Instance of an Object" when my exe calls the following c...more >>

Because of historical reasons, I have both C# and C++ managed/unmanaged code mixed together in my class library. But I prefer to port code to C# since it compiles faster and the syntax is much more readable so I can do more in less time. The big question now, will I gain/lose performance, giv...more >>

(Type your message here) How do i dynamically retrieve path for a particuler file name in vb.net.is there any namespaces to be include?.kindly tell me what is the procedure?.-------------------------------- From: selvi ss ----------------------- Posted by a user from .NET 247 (http://www.dotne...more >>

Hai one and all..I have a doubt about inner classes in C#.net..Here by I need a full description about that.plz sent it to me.. -------------------------------- From: raja sekar ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>i9U20+cBqkend17NigJrJg==...more >>

Hi evrybody ! Does anybody know how to call a java class from a COM component ? Any suggestion ? Thanks Andrea ...more >>

Hi! I am new to managed c++. I have a byte gc array and I want to pass it to a function that takes a __gc* to unsigned char. How would I convert my byte array to this? Byte arBuf[] = __gc new Byte[nSize]; // I have code here to read from a file to this buffer. // Now I need to pass this ...more >>