Hello I am using C++ 5.0 learning edition, to compile an DirectX8.0 SDK program sample included with the SDK download I keep getting a linker error --------------------Configuration: Donuts3D - Win32 Debug------------------- Linking.. C:\Program Files\DevStudio\VC\LIB\d3dxof.lib : fatal erro...more >>

Hello: Firebird .NET Data Provider 1.5 available for download. Thanks very much to all the people that has been helping during the development stage. --------------------------------------------------- You can read the Changelog at: https://sourceforge.net/project/shownot...more >>

Visual studio help has the following code to illustrate the use of ReadWriteBarrier. What does the volatile keyword do in Visual C++? Does it ensure the code will work correctly when executed on a machine with multiple CPUs i.e. that a read of a volatile variable always sees the most up ...more >>

Hi Anybody has an idea of how to invoke a command line DOS(PERL) application from a C++ windows application given also the batch file. I'm not too sure on this. Your help will be greatly appreciated Joyce...more >>

Hi, We're looking to apply a system-wide version number across many dlls. We'd really like to do the build and then apply an attribute containing the version number. Is there any way of doing that ? We don't really care how it's done as long as it's something that stays with the file, and can ...more >>

I use the C++ to write a dll and call the dll using VB6 VC++ Code BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserve return TRUE int WINAPI MyDLLAdd(int d1, int d2 return (d1+d2) int WINAPI...more >>

If anyone can help me it would be greatly appreciated I am struggling with connection to a DDE server - I have a global variable defined as my conversation handle (newDDE) and the instance defined also as a global variable (dwDDEInst). I get a successful connection, which sits until I want to sen...more >>

Hi All, I developed my program on win2000 using VC++7.0, it also works well on WinXp, but unfortunately it crashs on 98 or ME, since VS. Net can't run on Win98, I can't debug it. The program is very complicated and would be very difficult just by TRACE. Can anyone suggest a better way for debugg...more >>

Is the packing alignment of __nogc classes stored as part of the assembly ? I think it must as the compiler, when referencing the assembly, could not know how the original data is packed otherwise. Yet, in my understanding, attributes are only __gc and __value class specific and do not apply to ...more >>

Hi, I am new to VC++. ... so..please help How to set a Form as statup Form in VC++ Windows form application? Thanks ...more >>

Hi guys! I'm fairly new to managed C++, so I hope someone can help me. I've got a Problem with the native C++ types. What I did is using an jagged array of double in my managed app. The code looks like this: double** arr = new double*[1000]; for(int i=0; i<1000; i++) arr[i] = new d...more >>

Hye, I want to develop one core process which has a lot thing to do but fortunately does not have any GUI. In short, it is a core process which does its processing without any GUI and does the work according to system parameter values... (those are internal things.. I have managed them) but ...more >>

Hi everyone, I'm relatively new to managed c++ (though experienced in unmanaged c++), but I just can't figure out how to do the following c-sharp lines in managed c++ (studio 2003). Can anyone enlighten me, please? Following is a simple C-Sharp-Source for reading out wireless lan signal-str...more >>

Hello everyone, I have tried all the solutions trying to figure out how to remedy my = mixed mode DLL solution, however, I still can't get the project to compile. I have tried all the = solutions managed in the=20 Microsoft Knowledgebase article, but I get the following issues: libcmt.lib(...more >>

Hi I am developing an app in which I have used a MSComm object. I have opened the port, performed the transactions, and then closed the port. But when I check in the task mamager, the memory being held by the MSComm is not being released. I am using the SetPortOpen method. Is there any way of ...more >>

With the below example (taken from MSDN).. This also makes visible the set_Size and get_Size methods, and generates the Size property as we normally see it. Why didnt the get_ and set_ methods be private like the rest so just the Size property thats generated is visible? Doesnt make sense...more >>

Can anyone explain why when Visual Studio creates code that has to use strings it puts a S before every string? Example System::Console::WriteLine(S"Hello World"); ...more >>

Hi all, I'm currently reading Microsoft Visual C++ .Net and I'm trying to compile a Dialog box form that I've just created however I'm getting the following errors. Output Window Compiling... MyDialog.cpp c:\Code\CppForm\MyDialog.h(168) : error C2440: '=' : cannot conver...more >>

Two questions. The first and one more likely to be answered is Can you call/run a Windows executable file from within C++ source code? The executable itself runs in a DOS window and asks for user input, i.e. choose 1 to use an audio stream, 2 to read from a file, and 0 to exit. If 2 is selected a ...more >>

I am a college student trying to teach myself c++, and the book that I am using ("SAMS Teach Yourself C++ in 21 Days") incidently uses Microsoft Visual c++ as the compiler for its examples. So I need visual c++ to follow with the book. Since I can't afford the commercial version, does anyone know ...more >>

I have an application that requires a DLL and an executable that uses the DLL, both of which were implemented in Visual C++ using unmanged code. Both the executable and the DLL are linked with functions that are stored in a static library. During initialization of the executable, classes and stat...more >>

Hi, How do we marshall a type like this from a C++/CLI class wrapper to an unmanaged method? typedef struct { UINT32 blah : 1; UINT32 blah2 : 1; UINT32 blah3: 1; UINT32 someValue : 12; }SOMESTRUCT; Thanks. ...more >>

I am trying to write programs in C in a text editor and run them on a command line but I am having trouble. In Visual C++ 6.0 you can select text file then compile and then run the program and it will atuomatically run in command line, but in .net this is not available. Is there any way that you c...more >>

I want to rewrite the follwoing VB6 code in manged C++. Any suggestions on how to start would be greatly appreciated. Thanks. The code: On Error GoTo ErrorHandler Dim strArgs() As String strArgs = Split(Command$, " ") If (UBound(strArgs) <> 3) Then Err.Raise 9999, "Progra...more >>

The recent questions about C++/CLI in this group made me wonder if some folks had their hands on it.... Is it available someplace? How is the calendar shaping up for Whidbey Beta 1? ...more >>

Hi Is there a way to enable Emacs/Vim style buffer switching in the VC++ editor? For those that don't know this is where you hit a shortcut key in Emacs/Vim and then type the partial name of the file/buffer/window and it provides a list of matches to the partial name. It's kinda like hitti...more >>

Does C++/CLI support default values or is it like C# where we have to use overloading only? I have some unmanaged methods with default values (I may not need them thoough) I need to implement in my managed proxy class. ...more >>

Hi, Some how I cannot step into MFC code, it used to worked till last week. What is the reason? What is the solution ? 10x, J. ...more >>

Hi, Is there any good links for datatype interop? I need to pass some structure pointers into an unmanaged method and return char* etc but having some problems in my C++/CLI proxy class. I have a methods with signitures like the following... unsigned char someMethod(unsigned ch...more >>

Hi all, although I'm not new to news group, it's my first post in here. Had to go through the web interface since I couldn't find an direct access to the Microsoft NNTP server and my provider (sympatico.ca) doesn't publish this particular newsgroup :-( and not sure if I have the right forum. My q...more >>

Personally, I like to use simple abstractions to wrap resources For example consider a class that wraps a resource - say an IntPtr which is allocated in the constructor and deallocated in the destructor. In the managed world I find that I can not use this because destructors (and copy constructor...more >>

Following code can't pass compilation class CLS :public exception { public: CLS():exception("111") { } }; void Fun() try { throw CLS(); } catch(...) { } //; //adding this semicolon can pass compilation. void Fun1() { } if the class CLS does not derive from std::exc...more >>

Hye, I am Jigar Mehta, I want to ask how can we put our own 48 X 48 - 32 bit icons in the interface like near password field, I want to put Password Icon. The icons are created with Alpha support (that of Windows XP icons)... So, which control to be used for putting these icons on the form.....more >>

Hi all, Following code causes strAddress to contain garbage data. When I decrease number of characters that appear before '\\' then everything is ok. 12 chars before '\\' seems to be a magic number. I have compiled it with VisualStudio 2003. Any ideas? std::string strAddress = "123456789012...more >>

Does C++/CLI have XML style commenting like C#?? If i do /// I dont get the completion like C# ...more >>

Hi guys, I would like to find out if : 1) Is the above possible? I have tried to wrap a C library that our company produces in a .Net class library and am receiving the following error: LIBCMT.lib(crt0.obj) : error LNK2019: unresolved external symbol _main referenced in ...more >>

Hi Can we not use the following.´?? namespace Vendor::Product It wont compile with that Must I always do the following? namespace Vendor { namespace Product { } } ???!!!?? ...more >>

I'm currently using the following statements inside "Do.. While" loop cout << "Please enter the file name: "; cin.getline(FileName, 19, '\n') On the first execution, everything works ok, but when the 'while' condition is met and it goes back to the beginning of t...more >>

I guess this problem can be distilled down to: How do I search through a string, find the first matching substring, replace it, and continue through the string doing this. Can replace_if() be used to do this? Here is a concrete example: If I have a string with sequences of CRLF and possibly ju...more >>

Hi! I have a very simple question: Is it still true that pre variable incrementation (like ++i) is faster than post incrementation (i++). I heard that in modern compilers it makes no difference as the both versions are optimised to one type of code. I've also never encountered any performance ...more >>

my windows.h file (and probably lots of other headers) has suddenly DISAPPEARED. Reinstalling the SDK didn't fix it. what could have happened to it? ...more >>

Hi, Below is a smal test program which create two objects deriving from DataTable. When running the 3 lines of code marked as Ex1 the destructor of DataTableEx is never called,- why? When running the 2 lines of code marked as Ex2 the first line fail compilation claiming there is no destr...more >>

Hello, sometimes the source code below raises following exception: HEAP[Test.exe]: HEAP: Free Heap block cda1788 modified at cda1880 after it was freed Unhandled exception at 0x77f65a58 in Test.exe: User breakpoint. This exception is only raised a few times. Sometimes the code works wit...more >>

Our company is about to upgrade to VC7 (.NET) from VC6.0 Regarding VC7, I have a question 1. In VC6 there used to be a problem when mixin C++ "catch" and SEH's "__finally". The compiler used to generate a lot of warnings. Has it been corrected If yes, how ...more >>

hi On a form ive added my custom component (MyComponent) which has a property (IDs in the expample code) exposing a collection of int16. I see this property in the PropertyGrid and I dont have trouble adding items to the collection at design time (using standard CollectionEditor class). I can A...more >>

In C#, when one specifies an assembly attribute for the Assembly version, this becomes the file version as well. In Managed C++, there appears to be no relation between the assembly attribute and the file version. In fact, unless one specifies a version resource, no version attribute will be g...more >>

I have a .dll with "C" functions that I need to call. One of the functions returns a simple struct(2 doubles) If I try to use DllImport like this: [ DllImport("somedll.dll] SomeStruct1 f1(SomeStruct1 *pS); I get compiler error C3385 "a function that has a DllImport Custom Attribute cann...more >>

hi, Just wanna know whats the difference between a *.hpp and *.h files. Seems like they are writing code in *.hpp and also using it as header file but in *.h they dont write code, only headers. ...more >>

How do I call a function that returns a string in managed C++ This for example is very wrong. private: System::Void button1_Click(System::Object * sender, System::EventArgs * e) { string str; str= GetTextMessage; MessageBox(0,str.data(),"Test",MB_OK); } private: System::String...more >>

Just a little sample : class A { public: A( ) { } template<typename T> A( const typename T& a) { } }; int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int ...more >>

I have a class with a private member function: void H6809_CPU::StoreWord(Word Data, Word Address) { Memory[Address] = Data >> 8; // High byte of Data Memory[Address+1] = Data & 0xFF; // Low byte of X cout<<"Inside Store Word:"<<MemoryWord(Address)<<endl; } I call it from another public memb...more >>

I want to get the real name of my .exe and the current directory if the user change it, but i haven't find a function that do the job. Please help Thanks...more >>

Hi I'm using Visual C++ .ne I'm using the default compiler but it doesnt seem to be generating .obj files in debug mode It creates a debug directory in the correct place but doesnt put any obj files into it I get no compiler errors, then when it comes to linking I get error saying object files c...more >>

Hi , I work with C++ for my final test , I use DataGrid Control 6.0 (OLEDB) to store the data , but the default column properties is only 2 , i can create more i use the ADODB to manipulate the database ( a table is more than 2 cols) so i cant view all fields from the table. I try f...more >>

Hi all: I have create a both container and server's Active document ,it works well when open a document in IE, but when user close IE, it prompt a dialog : this document has been modified.Do you want to save changes? yes :... I don't want to prompt the dialog, how to disabled it? Best ...more >>

Here is a chunk of data float m_fStrtTime, m_fTRise, m_fT0 float m_fFO20, m_fFO2M, m_fFO2F float m_fFCO20, m_fFCO2M, m_fFCO2F float m_fFHeF, m_fFHeFF; float m_fR2Hel, m_fR2Acet, m_fR2DME, m_fR2CO float m_fIHel, m_fKHel, m_fIAcet, m_fKAcet, m_fIDME, m_fKDME, m_fICO, m_fKCO float...more >>

For a long time I was a gib fan of Borland C++ Builder with VCL framework and never gave a second look in Microsoft products since I've seen MFC. Anyway, recently Borland decided out of the blue to abandon it's C++ Builder and I decided to give a look into the .NET C++ and .NET C# products. After ...more >>

Hello, I'm using VC++ 7.0 .NET. It seems that the "%d" and "%f" format parameters are not supported anymore. Following code does not work: StatusLabel->Text = String::Format ("Reading %d bytes (%0.1f Kb/s)", __box(lBytes), __box (dTransferRate)); If I used this code with VC++ 6.0 and MFC ...more >>