Can someone tell me how to get the below code working please. System::Byte * enced = new byte[Data->Length]; ///.. copy data in to array. (omitted)... //Now pass to memory stream constructor MemoryStream * ms = new MemoryStream(enced ); I get an error cannot convert parameter 1 from 'unsi...more >>

Hi, all! We are devleping one app that will use disk access with FindFirstFile and FindNextFile for it. Can someone expose me how works FindFirstFile and FindNextFile in disk access? Does the findFirstfile read all files of disk and put in physical memory , and FindFirstFile read files fr...more >>

I am developing a c program in Visual Studio .NET 2003. I also have an Intel(R) Fortran compiler for MVS .NET My fortran sourcecode already existed. I started a new fortran project and chose to create a dynamic link library. The beginning of the fortran code looks like: SUBROUTINE SFTC...more >>

Hi, I have a function that creates an array and want to use that array in the client. but what is the syntax in C++.NET 2005 to specify an array as output param of a function ?? ref class Test { void OutputParam(array<int>^ intArr) { intArr = gcnew array<int>(3); for(int i=0; i<int...more >>

Hi, using the setup project in VisualStudio : I add an exe that uses a component so I add the component to the setup-project as well but how can I specify that the component must be installed in GAC when the client runs the setup for the application ? (so far is it only installed in the direc...more >>

Hi, I have an array of bytes like Byte m_Data[] = new Byte[2000] ; Byte sequences starting at a random index (4 byte aligned) should be interpreted as unsigned long values and compared with each other. My first try was if ( reinterpret_cast<UInt32*>(&m_Data[20]) == ...more >>

I'm using "FILE" function to write an array in a file and in this way I see that when is present a line feed (10) the function automatically insert a carriage return(13). This cause an error when i try to read the file. I would like to know why this carriage return is inserted and if is possib...more >>

Hi! I've developed a simple game that needs to be compiled as a multithreaded dll. I've read that since I use this runtime-library my applications will need MSVCRT.DLL at runtime. Is it possible to perform static linking with MSVCRT.lib or do I have to ship MSVCRT.DLL together with my .exe? ...more >>

Hello, I'm having a trouble with a Shell.Folder object when I'm trying to use it from a C++ application, but at the same time, the same object works fine from within html script. The effect is that, I cannot put data into a compressed folder in C++, in spite of the fact that all operations ...more >>

Hi, ultimately I want to call some unmanaged C++ class that contains some DirectShow code of mine from my C# classes, but for the time being I'd be happy if I could get this to build! I have read the other topics on the same problem here on the groups but haven't found the solution to my prob...more >>

I'm trying to call the Microsoft image-processing function AlphaBlend() in my Visual C++ application. My software compiles okay, but gets a link error (details below) that says it cannot find the symbol AlphaBlend(). I'm calling dozens of other Microsoft bitmap and imagery functions withou...more >>

Can someone tell me what I'm doing wrong here: DataTable^ table = safe_cast<DataTable^>myDateSet->Tables[0]; I am getting a compilation error. Rasika....more >>

Greetings! Going directly to the point: myclass.h: //-------------------------------------- #pragma managed //Forward declaration class AnotherClass; #pragma unmanaged class MyClass { public: void func1(AnotherClass* ptr); } Will this '#pragma managed' before '...more >>

Hi, I'm trying to link a mixed (CLR and native) DLL with visual studio. I have it working fine on the command line, where cl is used to invoke link, but I can't get it to work with VS. I get: unresolved external symbol: __CorDllMain@12 I am linking in msvcrt.lib and msvcprt.lib explicit...more >>

Hi, I'm converting some Unix code to Windows. I need to fork() in a section in my code. Nearest Windows functionality is CreateProcess(). Any ideas or guidelines (gotchas) on best practices/how to procedd? Thanks ...more >>

I need to be able to build my code into a dll where the checksum of the dll is the same everytime I build it. In other words, the same exact code gives me a different checksum each time I build it. Does anyone know why the dll would not be the same every time? Is it adding a timestamp in ...more >>

I know that it's possible to register with the OS to receive certain file system events. Does anyone know if it's possible to receive an event when the user changes the default printer setting? Thanks. Jerry ...more >>

Hi, I try : short ^arrShort = gcnew short [MAX]; arrShort[0] = 1; --> COMPILER ERROR error C3915: 'System::Int16' has no default indexed property (class indexer) WHY ? how can I put a value at the first position ? thanks Chris ***************************...more >>

I have an interface in Managed C++ where one of the methods is this one: Object *Foo(Boolean *b) When I use tlbexp to check the IDL the line above is converted to: HRESULT Foo([in, out] VARIANT_BOOL *b, [out, retval] VARIANT *ptr) However I need: HRESULT Foo([in] VARIANT_BOOL b, [out,...more >>

My very large native C++ app takes a long time to link (approaching five minutes). How can I troubleshoot *why* it takes so long to link? I'd like to look for ways to reorganize things to speed up the link. Thanks, Chris ...more >>

When I attempt to extract a thumbnail from a simple JPG in Windows 2000 I get an error. This works fine in Windows XP and 2003 Server. The error is 0x80004002 - "No such interface supported". I have called ::CoInitializeEx(NULL, COINIT_MULTITHREADED); before running this code. Below i...more >>

I need to put up a simple modal dialog, and am surprised how hard it seems to be. Am I missing something here? I have created a dialog resource IDD_DELETE_S9. It has some static text plus 3 buttons. The buttons have ids of IDOK, IDCANCEL and IDC_RENAME. All I want to do is put up this mo...more >>

VC++ .NET 2003 Standard Edition Win XP, SP2 Hi, I have a code that builds under VC6.0, but fails to link in VC7.1. The offending code is as follows: _AFX_RICHEDIT_STATE* const pEditState = _afxRichEditState; The linker errors are: ---------------------- LVBaseDetailsView.obj : ...more >>

I need to write a program that launches Internet Explorer, then counts how many <ENTER> keys are pressed inside IE. I've seen a lot of references to the SetWindowsHookEx() API call, but all sources I found seem to be piece-meal and incomplete. I'm using VC++ .NET, and would rather avoid usin...more >>

I can not make a dll. file in Visual C++ Express Edition 2005. It wont let me. Is there any way to make one. Am I able to make one with this edition? Thanks....more >>

Hi, I know, this question was posted a year ago (link below). I wonder whether Microsoft changed it's mind and fixed check_stack pragma to disable buffer security for a single function. I would hate to disable the security for the whole project (or module) because of a single function. Th...more >>

Hi, how do you mark an object for garbage collection in C++.NET 2005 ? MyDbClass^ obj = gcnew MyDbClass(); // Release the object obj = 0; --> COMPILER ERROR obj = nullptr; // nope : this does not mark it for garbage // collection (see help) so ... ...more >>

Greetings. I develop a multiple forms applications with Microsoft Visual Studio C++ .NET 2003 and I'd like to know how can I print more than one page in my application. For printing one page, I do: private: System::Void button1_Click(System::Object * sender, System::EventArgs * e){ if(p...more >>

Hello, i plan to use a managed dll containing WinForm classes in an unmanaged win32 exe. Starting from NOTHING, how do i have to proceed ? I have found the following tutorial on microsoft.com : "Converting Managed Extensions for C++ Projects from Pure Intermediate Language to Mixed Mod...more >>

I'm really struggling with this issue. I can see it's complex, but given the difficulty in reproducing it it's really essential that the advice provided is bullet-proof and very clear. So far, I can't follow the advice. My situation is this: I have followed MS recommendations to convert my i...more >>

Hello Folks, Please help me. I am trying to send data to a multi-line textbox one character at a time. However, the text box is not showing a continuous stream; instead, it is showing only the single character each time I write to the text box. How do I show a continuous stream? Learner ...more >>

Hi, all! Thanks a lot for your responses. We are using the GetProcessTimes for calculation of cpu usage. We are using the following calcution for get cpu usage: (((NUserTime - OUserTime) + (NKernelTime - OKernelTime))*100) / (NTime - OTime)/NumProcessors, where NUserTime - is the...more >>

Example... This would make that i can assign a ULONG to a CComBSTR2 class while the body of the code performs necessary conversion. CComBSTR2& operator=(ULONG ulong) { } QUESTION: Can I do it the other way around as seen below? // code below does compile but still has no ...more >>

Hi all, Using VC Express Beta 2, Just a simple class so far cause I can't get past this error: error C3861: 'CoInitialize': identifier not found public ref class Class1 { public: Class1() { CoInitialize( NULL ); } ...more >>

Dear friends, I'm fresh in VC++ .NET. Console::WriteLine(S"Welcome to VC++.NET"); Why it's use "S" in it? regards Singaravelan...more >>

the String class is required in .Net yet it doesn't seem to provide suuport for the "+" operator, you have to litter your code with "String::Concat" everywhere you want to concatenate strings. Does everyone use other string classes and just convert at the end when they have to pass a String? W...more >>

I have a Visual C++ .NET function that is calling an unmanaged function that returns an ADO _Recordset* object. I want to be able to convert that into an ADO.NET DataSet (or DataTable). I tried to use the OleDbDataAdapter.Fill method, but I could only get that to work if I gave it an ADODB...more >>

I'm trying to delete off a 0-byte file that gets created after trying to download from a bad URL, but I'm getting an IOException that says that it's being used. I also noticed an InvalidOperationException before the IOException in the debug output, but I can't seem to try/catch where that co...more >>

(Posted here because nobody wants to answer me in framework.interop, and I _am_ using VC++!) IFont to System::Drawing::Font is easy enough: get the hFont property and then use Font::FromHfont. But how can I go from a Font to a corresponding IFont? TIA Phil Atkin ...more >>

MessageBox in managed C++ v.8 (Beta2) Hi there! I'm having problem using of MessageBox class in my CLASS LIBRARY. I have added reference for System.Windows.Forms but still and all.... Thank You Regards. ...more >>

Hi, All! We are developing one app for windows 95/98/Me/NT4.0/2000/XP/2003 using Visual C++ 6.0. We need to set the % of CPU Usage to app process. Is there an API to set % of CPU Usage? Can Someone help us? Thanks in advance....more >>

I need to put a breakpoint when a particular memory location is written. To be more specific I want to know when 0 is written onto that memory location. Is there a way to do it in vc7? Regards, Anil. ...more >>

Greetings, I need to execute 2 applications from an application or batch file. The first app launched has the user enter a product key and the app's exit code will be 0 (failed) or 1 (succeeded). Based on the exit code of the first app, the second app will be run. My problems : ...more >>

I am trying to find a prewritten method for converting a string like this:"Hello World" to this "Hello\sWorld". I plan to use it to build a regular expression. Specifically I am looking for a method that can convert not just space (\s) but also any character that needs to be escaped in a ...more >>

I have former VC++ 6.0 application which was ported to .NET. Now we continue to develop this app under VS.NET. The app now contains both managed and unmanaged classes. Now I have a problem with usage of resources in managed classes. For example I want to display warning message and want to loa...more >>

How Can I recover data from REgEDIT since Visual C++ 6.0 ? Thanks in advanced ...more >>

Hi Team : I do no know the procedure to delete file using CFile ?? or any other way (command or procedure) to reach this action. Thanks in advanced ...more >>

Hello all, I'm working on a school project to make a security program. I need to get the MAC Address from the computer. That is the "Physical Address" when you type "ipconfig/all" in MSDOS command prompt. It is urgent and I have spent pretty much time there, but still don't know what to ...more >>

I am making a managed C++ wrapper for calling legacy C++ code from C#. I don't understand what's wrong with following code : __gc public class SerialBuffer { private: unsigned char __nogc*_buffer; short _bufferNr; bool _isUsed; int _length; public: SerialBuffer (short buff...more >>

Hi, I am a vb.net programmer who has written a simple VC++ dll that I call from my vb program. How do you get to step into the VC code when debugging? I have tried putting the compiled dll into the output directory of the vb project. I have tried setting the attach attribute under C++ project...more >>