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Re: Don't understand what's required in order to use unmgd c++ class in c# app - help? sherifffruitfly21-Jul-07 11:16 sherifffruitfly 21-Jul-07 11:16  I want instances, so I guess the COM compilation is what would be helpful. I'll look up how to do that. The way I did it, I believe it's "just standard": #ifndef DllExport #define DllExport __declspec( dllexport ) #endif ... class DllExport {...} Thanks for the suggestions! Registry settings for all users (with user privileges) [modified] AnTri21-Jul-07 6:12 AnTri 21-Jul-07 6:12  Hey, I want to write some status variable to the registry HKLM\Software. This works fine with admin privileges but not with user privileges (and VISTA UAC). Where can I store values for all users in registry or should I use files (e.g. counter for a trial period)? Please help me... -- modified at 12:45 Saturday 21st July, 2007 Re: Registry settings for all users (with user privileges) Michael Dunn21-Jul-07 10:04 Michael Dunn 21-Jul-07 10:04  You can use the All Users\AppData dir - call SHGetFolderPath(CSIDL_COMMON_APPDATA) to get the path. --Mike-- Visual C++ MVP LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ Dunder-Mifflin, this is Pam. Re: Registry settings for all users (with user privileges) Mark Salsbery21-Jul-07 11:06 Mark Salsbery 21-Jul-07 11:06  To add to Michael's answer, here's a link to details on where and how to properly store application configuration data: How to write a Windows XP Application that stores user and application data in the correct location by using Visual C++ 2005 or Visual C++ .NET[^] Mark Mark Salsbery Microsoft MVP - Visual C++ Split string dellthinker21-Jul-07 5:05 dellthinker 21-Jul-07 5:05  Hi all. Suppose i were to have a long input from a socket. <quote> connected to server: something.host.com : etcetera Instead of trying to compare the entire string of characters, how would i break it up so that i can only compare a certain string, for example the 'something.host.com' string? This is a std::string too. Re: Split string Mark Salsbery21-Jul-07 5:19 Mark Salsbery 21-Jul-07 5:19  I don't know about any specific APIs to do this, but you can always use the find/rfind/substr methods to parse a std::string. Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Split string #realJSOP22-Jul-07 0:34 #realJSOP 22-Jul-07 0:34  I wrote a string parser and posted the article here, and a STL version of the class is included. http://www.codeproject.com/string/cstringparser.asp[^] "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997 ----- "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001 MSDN OLE DB Sample Provider entry point George_George21-Jul-07 3:34 George_George 21-Jul-07 3:34  Hello everyone, I have built MSDN OLE DB Sample Provider and successfully built/debug it using Microsoft Excel as client. I have found that in DllGetClassObject (classfac.cpp), the class SampProv is initialized as the 1st coclass, then DataSource object will be created in QueryInterface. http://msdn2.microsoft.com/en-us/library/ms715011.aspx The entry point of a COM server (like this Sample OLE DB Provider) is creating a coclass through DllGetClassObject. My question is, how did Microsoft Excel find the entry point coclass of the OLE DB Provider is SampProv coclass? I have this question because Excel is a client with no knowledge about any specific application defined CLSID, like SampProv, how could it be aware of this ID (i.e. Excel knows nothing about 3rd party application's specific name of entry point coclass)? In Windows registry, I can not find any related information indicating that SampProv should be the entry point coclass either. thanks in advance, George AfxRegisterClass - dialog based app problem john john mackey21-Jul-07 3:08 john john mackey 21-Jul-07 3:08  Hi, i am having much frustration with this one... I have a dialog based app in which I want to register its window. I have tried putting the AfxRegisterClass( ) code inside the InitDialog( ) function, but this has not been successful - at best it just doesn't do the registration, at worst (when I've parred down WINDOWCLASS items (.style, .icon, .cursor) i have got a run time warning about a resource is unavailable. I am using Studio 6.0 and the utility Spy++ to see if my dialog's window is indeed given a class name - it's not. I need to register my dialog app so that I can send it messages from another app via PostMessage(window-name, class-name) Any help? Thanks! Re: AfxRegisterClass - dialog based app problem Arman S.21-Jul-07 5:15 Arman S. 21-Jul-07 5:15  You are trying to register an already registered window... which is wrong. Also, the point that after registering a window you would be able to PostMessages to it, is also wrong. PostMessage does nothing with registeration. A window need to be registered in order to be used. If it is already in use, then you can do a PostMessage or SendMessage to it if, of course, you have the HWND of that window. -- ===== Arman Re: AfxRegisterClass - dialog based app problem Mark Salsbery21-Jul-07 5:46 Mark Salsbery 21-Jul-07 5:46  Dialog's use a pre-defined window class that we don't have access to. You can register a class but there's no way to create a dialog window of that class. You could add a custom, private window property to the dialog's window that other apps can look for. You can also make the dialog modeless and a child of a frame window - for the parent frame window you can register a class and create the window of that class. Mark Mark Salsbery Microsoft MVP - Visual C++ Re: AfxRegisterClass - dialog based app problem john john mackey21-Jul-07 16:50 john john mackey 21-Jul-07 16:50  Hey thanks! I like this reply better than maybe those that have just posted the acerbic definition answer. In Spy++, i see that my dialog based app has Class name of #32770 (or something like that). But then again there can/are numerous "#32770" classed-windows out there at anygiven time and thus makes my "FindWindow(classname,title)" pretty much useless. On that note too, "title" can't be assumed in my case as the app is putting a dynamic string in "title" for differernt operational conditions. for me. I guess I will have to study another way of Posting messages to this dialog based app (too much involved for re-write to frame window....) Thanks again, Johnny Problem about CPU resouce kcynic21-Jul-07 2:14 kcynic 21-Jul-07 2:14  I have a video chat project.I use DirecxShow to capture video frames and udp to translate the video data.In the project,I use WM_TIMER message(using SetTimer() of cource)to capture a video frame and send it each second. But I find,my program exhaust almost all the CPU recouce up to 98 percent or more. And in another hands,I had a look at other video chat products,they only using 1 to 3 persent of CPU. Some body would tell me why,and how to resolve it? GOOD LUCK Re: Problem about CPU resouce Mark Salsbery21-Jul-07 5:50 Mark Salsbery 21-Jul-07 5:50  Are you spinning in a loop on a thread somewhere? What is the timer interval? Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Problem about CPU resouce kcynic21-Jul-07 15:06 kcynic 21-Jul-07 15:06  Yes,I spinned in a loop on a thread to retrieve data packages from network.But I have no choice.(client). In the timer,I capture a video frame and send it each second. Re: Problem about CPU resouce Mark Salsbery21-Jul-07 15:37 Mark Salsbery 21-Jul-07 15:37  In that loop, are you using sockets? If so, are you using a blocking socket that blocks until data is received? If not then that will use nearly all your CPU. For the timer, that's one frame per second? Interval is 1000 milliseconds, right? If so, then that takes about zero CPU Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Problem about CPU resouce kcynic21-Jul-07 16:26 kcynic 21-Jul-07 16:26  In the loop, I think it uses none-blocking socket.In fact,I use a RTP socket to do such thing.(JRTPlib.lib,I think you do know it). I am sorry,for timer,I capture a video fram and send it each 200 millisecond. Re: Problem about CPU resouce Mark Salsbery21-Jul-07 19:21 Mark Salsbery 21-Jul-07 19:21  The thread with the communication loop would be much more efficient if it was event driven. If it's just spinning, it's spending most of its CPU cycles doing nothing. You may want to look into using WSAEventSelect() and waiting on an event indicating there's data available to be read on the socket. Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Problem about CPU resouce kcynic21-Jul-07 21:20 kcynic 21-Jul-07 21:20  I think you do know jrtplib,it doesn't give a event handle,so I could not using such way. Re: Problem about CPU resouce Mark Salsbery22-Jul-07 7:44 Mark Salsbery 22-Jul-07 7:44  kcynic wrote: I think you do know jrtplib Actually I've never heard of it but I'll take a look at it. Without seeing your code I can't imagine where to start, but I still suspect the problem would be in the communication loop. Your 200ms timer shouldn't be the problem unless you're doing an extraordinary amount of stuff each interval. Mark Mark Salsbery Microsoft MVP - Visual C++ 860430 - overrided operator delete is not called ilostmyid221-Jul-07 0:00 ilostmyid2 21-Jul-07 0:00  hi with the following declarations: void* __cdecl operator new(size_t nSize, LPCSTR lpszFileName, int nLine); void __cdecl operator delete(void* pData, LPCSTR lpszFileName, int nLine); void __cdecl operator delete(void* pData); in the following code: char *p=new char[10], *q=new char; delete[] p; delete p; the second version of operator delete (with only one argument) is called while the new operator declared with three arguments had been called. why? how to build a cylinder ? gentleguy20-Jul-07 23:41 gentleguy 20-Jul-07 23:41  Dear all how to build a cylinder using vc++ 6.0 or with OpenGL together? any one has such snippet, thanks a lot. too urgent!!!!!!! my email is lizhiyuan16@hotmail.com. need your help.. Li Zhiyuan 21/07/2007 C runtime library vipin_nvk20-Jul-07 23:34 vipin_nvk 20-Jul-07 23:34  What exactly is C runtime library, and what role does it play in loading a windows exe into the OS's memory ? Vipin. Re: C runtime library Matthew Faithfull21-Jul-07 4:46 Matthew Faithfull 21-Jul-07 4:46  That's a biggy. The C runtime library is a bunch of code that extends C++ to allow you do do useful basic things like write to the console, allocate memory, format strings, get locale information, declare thread local variables, use excecptions, spawn other proceses, initialize static variables, access the command line passed to your program etc etc. You either use it by linking dynamically to MSVCRT.dll in one of its incarnations or link in the code directly by linking to LIBC.lib or one of its variants. The reason for the various versions is different ones for Debug and Release and in the past different ones for single or multi threaded application. Strictly speaking the C runtime is not involved in loading a windows exe but it does do a bunch of stuff, some mentioned above, in your exe before your code is actually called so it kind of looks like it's involved in loading. By the time your program hits WinMain or main it has probably run several hundred to several thousand lines of CRT code. The thing that loads your exe is the PE (Portable Executable) Loader which lives somewhere in the Kernel (probably NTDll.dll these days). Once it has done its magic, setting up a process and related memory space for you and loading in your code it calls an entry point function which is a function with a well known siganture at a specific offset in the compiled code (The offset is stored in the PE header on the exe file ) If you use the CRT then that entry point will be something like mainCRTStartup depending in CONSOLE or GUI app type and UNICODE or ANSI build. The source of the CRT is on your system, if you chose to install it when you installed Visual Studio, and is worth a look. It's a big mess but a very educational big mess. Enjoy Nothing is exactly what it seems but everything with seems can be unpicked. List View nitin320-Jul-07 18:35 nitin3 20-Jul-07 18:35  I want to set forecolor of each item in listview control(repoort view) hwow to do that?

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