Hye friends!! Jigar Mehta from India. Currently I am loading one BMP file around 2.5 MB from the disk from my VC program and show it to its DC... But while CBitmap object tries to load it by LoadBitmap("c:\\my.bmp"); it gives error... I get error code of 1814.. I have also tried same program...more >>

Hi All, I am impressed with the aesthetic (UI) appeal of DotNet, but not by much else, like it's new fangled languages etc... I have a legacy C++ 3tier application, which uses C++ DLLs. I would like to use the DotNet frontend (e.g. the PL provided by infragistics). However, I don't want t...more >>

(I apologize if this is a fairly trivial question, but I mostly use C#, not MC++.) Problem: I've got an unmanaged DLL (and the LIB file), that exports a bunch of static functions. I'd like to be able to wrap this with a __gc class, and then access it from C#. All of the examples I've seen ...more >>

I am dying trying to get the GinaStub example to work at: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcsample98/html/vcsmpginastubsample.asp Any help is greatly appreciated and much thanks given in advance. I am very new to the Visual C++ environment, so I am hoping is ...more >>

Hye Friends!!, Happy New Year!! I am Jigar Mehta from India. Currently I am working on a project in which I need to compress some images on the harddisk... I want to make an engine that reads whole BMP image and then compress it.. The target location can be of any type.. BMP, TIFF, JPG or...more >>

When both waiting on an event and a simple unnamed mutex, I'm wondering when WaitForSingleObject might return WAIT_FAILED. These are both execution paths I'd very much like to avoid exceptional behavior but I haven't found much documentation on the specifics. Can anyone offer advice? Sean...more >>

I'm getting "multiply defined" errors on STL symbols. Isn't this a linker error ? By definition, doesn't the compiler/linker need to guarentee the "one definition rule". Linking... msvcprtd.lib(MSVCP71D.dll) : error LNK2005: "public: __thiscall std::basic_string<char,struct std::char...more >>

I am using VC++ .Net 2003 and have a question about putting a byte array returned from a socket receivefrom method in to a struct. Here is what I have: Socket* s = 0; Byte RecvBytes[] = new Byte[1500]; try { IPEndPoint* endPoint = new IPEndPoint(IPAddress::Any, 1646); s = new Socke...more >>

Does anybody know how to force visual to use a number this is around 1000 digits long and 64 bit floating point. I am a beginner in programing....more >>

Is there a way to change a CListBox from single selection to multiple selection, or back again, from inside the program after the CListBox has been created? Our application has several ListBoxes. I know its easy to use the properties dialog control it set the control to be single, or multip...more >>

I've found some rather worrying articles (Mixed Mode Library Assembly bug, Richard Grimes, Windows Developer Network Sept 2003 ; and Knowledge Base Article 814472 ) that point out the need to use the /noentry switch and an explicit initialisation procedure, to be able to safely use Managed C++ a...more >>

Is there a way to upgrade from Visual C++ Net 2002 to Visual C++ Net 2003? The 2002 version does not provide a Windows Forms Designer. I can't find any upgrade package on Microsoft's website. Thanks, Tim...more >>

Hi everyone, How are you ? Happy new year for all !!! Well I want to know how can I find some data like a tone in a recorded wave file in WindowsPCM format in 11kHz - 8bits. This file(s) will contain some conversations like phone conversations and some tones in midlle so I need to find...more >>

In C++ an overridden virtual function in a derived class must have the exact same signature of the function which is overridden in the base class, except for the return type which may return a pointer or reference to a derived type of the base class's return type. In .NET the overridden virtua...more >>

Hi, my friends, As I know, service and start automatically even before user login. So If it's possible to create a service, make it running when system start , and record windows login password when a user login. Best reards, Larry ...more >>

Hello, I am wondering if VC.NET has any built in support Server appliactions. I need a package to open a port, connect to a port, etc, but I'm not sure it that is delivered built in, or if I need to purchase an outside package. If it's built in, any directional help as in a sampl...more >>

Hi, I was wondering if anyone can assist me in initating some threading appliaction in VC.NET. I am trying to do a server, and will need to spawn multiple ports to listen on, but I can seem to find any decent sample on code that will allow threading. Any assistance will be great...more >>

and it block itself? I must reset the pc to unblock!...more >>

Hello I am a new C++ programmer and am working with the Visual C++ studio. I am attempting to create a simple console application for myself but I fin that neither of the introductory C++ books I own tell me how to clear the console screen or change the font color. Is there some way to do this...more >>

I have a number of DateTimePicker controls, some set to dates, some set to a format of Time. The controls are all embedded in dialogs. I created the controls by dragging the DateTime picker from the Toolbox and then set the Format property appropriately. I have noticed that sometimes the Time ...more >>

Hey, I'm learning about the limits header, and I don't understand one snippit of code. If I code: #include <limits.h> #include <stdio.h> int main() { printf("Smallest signed long long: %lld\n", LLONG_MIN); return 0; } I get the output: Smallest signed long long: 0 Why is this...more >>

There are very few posts on this NG, and very little MS MVP support. Is there a better NG on the Microsoft news server to post questions about programming with Managed C++ ? I know I can't be the only C++ programmer doing .NET development in that language. If I look at the C# NG, it has at least...more >>

Does the += notation for adding delegates to a delegate pointer object work even if the delegate pointer is 0 ? As an example: __gc class SomeObjectClass { public: void SomeObjectMethod() { } }; SomeObjectClass * someObjectPointer(new SomeObjectClass); __delegate void MyDelegate(); MyDelegate...more >>

Hi, I have to create a dll with communication functionality. The first idea was to implement only functions for sending, and user to implement (and pass me a pointer to) function for receiving. Dll would call those receiving events in internally created thread. The other idea is mechani...more >>

I'm trying to understand how is it possible implement function inside a .h file and not in a .cpp leaving the .h only for the prototype. For example: private: ...... ........ ........ private: System::Void NewClick(System::Object * sender, System::EventArgs * e) { // } ...more >>

If I try to reference System::Windows::Forms::KeyEventArgs in a header file I get the error: MyHeader.h(236) : error C2039: 'Windows' : is not a member of 'System' Any ideas why this is happening ? Can I not reference a name using its full path in MC++ or is this just a bug in the compiler ?...more >>

I am looking for a good bounds checker/memory leak check utility as Numega's Bounds Checker v6.01 is not working with VC.net. Any suggestions? Tom ...more >>

This piece of code prints "Hello, World!" only once if optimizations are enabled. It is expected to print "Hello, World!" 2^32 times. Optimizations: /O2 Compiler version: 13.10.3077 (VS.Net 2003) = = = = = = = = = #include <stdio.h> void main(void) { unsigned i = 0; do ...more >>

hi, sorry for the dumb question but how do i code a bit variable in c? i mean - shoudlnt the synax need to be: bit j; j = 1; correct me if im wrong (and i suppose i am). Avi....more >>

The following codes can't pass compilation in vc7.1, error occured at the possition where Foo is called. ************************************************************8 template<typename type> class base1 { template<typename type> class base2; private: typedef base2<type> base2type; publi...more >>

I would like to know a function that returns the handle of a form. The type has to be HWND. I know that there is a funtion (this.Handle) that gives me a handle of type IntPtr but the type I need is HWND. How can I do?...more >>

According to the CLS specification, the accessibility of the methods for adding, removing, and raising an event must be identical. There appear to be a few problems with this: 1) According to the Managed C++ specifications, if one declares a public event without any attempt to provide one's ow...more >>

Hi All, I have created a ASP.NET web service with a web method. This method retrives data from SQL Server and returns it as an XML string. Now I have added a web reference to this web service in a VC++ 7.1 (unmanaged) project. I call the web method in my VC++ code. The problem I am facing i...more >>

I am trying to learn .NET with the standard edition of VC++.NET 2003 Standard edition. When I use the wizard in the toolbox to connect to a non-microsoft ODBC data source, I get the error message "It is only possible to connect to SQL Server Desktop Engine databases and Microsoft Access da...more >>

Hi all, Either I'm missing something big here, or there's a problem with the C compiler in .NET 2003; and with the C compiler in Visual Studio 6 SP5 too .... Consider the following 2 lines: #define TEST_$$$ 0x05 static test_$$$[] = { TEST_$$$ }; The compiler works as ...more >>

Before I using this function, I've done all the prepare things. This included: GetCurrentProcess(); OpenProcessToken(...); LookupPrivilegeValue(...); AdjustTokenPrivileges(...); And the return code or the error code set by these functions indicated that they all executed suc...more >>

I am gathering from the documentation that return values from __events are not illegal but are frowned upon in .NET. If this is the case, does one pass back values from an event handler via "in/out" or "out" parameters ? Or is it simply that events are just notifications and are not interested in...more >>

I understand that specifying an __event, let's call it X, actually generates add_X, remove_X, and raise_X methods in the class of the __event. If one wants to allow the adding, subtracting, and calling of an event from outside the class, and one is implementing these methods for oneself with cust...more >>

I am creating an unmanaged Diretcx 9 application but I want to integrate it to my managed c++ application. Here is the problem: I dont want to use m_hWnd = CreateWindow( _T("D3D Window"),m_strWindowTitle, m_dwWindowStyle, CW_USEDEFAULT, (rc.right-rc.left), (rc.bottom-rc.top), 0,LoadMenu(...more >>

I got this error from my compiler with a little test class I was playing with one afternoon. It's not production code or anything, but it's small and I looked it over pretty carefully and couldn't find anything wrong. I am just playing around with winsock at a low level and I want it to be cr...more >>

Hi, Basic Question, difficult answer 1) Thread one; Open Context Menu. 2) Thread two; it needs close the Context Menu without Mouse interaction. Thread two has all the information about the Context Menu Somebody knows how to do it? Basically I need close the Conte...more >>

I need somebody to explan to me what LINEAR SEARCH and BINARY SEARCH is. This is the subject of arrays, so It should be easy to explain. THnak you for your time....more >>

Hi, Does anyone have suggestions (maybe options etc) as to how I could improve my compile and link time in VC7.1. I'm seeing a pretty bad deterioration from VC6. BTW, I use pre-compiled headers. Thanks in advance. AP....more >>

Hi, In VC7.1 there is the compiler option to turn on run time error checks (/RTC compiler options). So if there are any uninitialized data a dialog pops up. I know it's useful but is there a way to turn this off for the session at least because it is a nuisance while debugging? It's not always...more >>

Since a C++ using declaration isn't allowed in MC++, is there a way to specify that a property, method, event, or field's access can be changed in a derived class, ie. is protected in one class and is made public in a derived class ? ...more >>

How does one specify that a given property or event should not be shown in the Component or Windows Form Designer so that the end-user can not manipulate it at design time ? I suspect an attribute exists for doing so, but I have no idea what it is. ...more >>

Hi folks, I'm having trouble building a new COM project I created in VC7. The following linking errors occur: nafxcw.lib(thrdcore.obj) : error LNK2019: unresolved external symbol __endthreadex referenced in function "void __stdcall AfxEndThread(unsigned int,int)" (?AfxEndThread@@YGXIH@Z) n...more >>

Hello, I have a Managed C++ dll to contain an AVI Capture tool. This dll contains a __gc class to interface with a C# application, and a __nogc class to contain calls to the Win32 API and VFW libraries. This code works well on XP, but when I call the constructor for my __gc class from a C# ...more >>

I am very confused about the different ways of VC++ and C# for doing windows form/dialog design in Visual Studio.NET. In C#, after you drag & drop the components to the form, the underlying codes will be automatically modified to add corresponding objects. However, in VC++, in order to...more >>

the following codes can pass the compilation in VC6 but not in VC7.1.. is it a bug? #include <list> template<class type> class myclass { typedef myclass<type> mytype; std::list<mytype *>::iterator myit; } ...more >>