Why should I code in header file [Visual studio C++ 2005]?

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  - 1
    - alt tab mystery i created a reversi game at http://www.coolgroups.com/reversigame2/ in C++. i noticed that, if i alt tab away from it in windows xp and alt tab back, the game screen is blank. however, if i do this on my win 2k system, the game screen shows up correctly. i'm using opengl and a separate thread for the graphics. any ideas why this might happen? btw, the game installs the source too. thanks. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259123
  - 2
    - Windows Service : Dependencies Hi All, I have one service that depend of SQL Service, and this servive(my) can start if only the SQS is running, but this service is located in other machine; Have any way to specify this? Thanks Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259118
  - 3
    - Static Variables in C++ Hi, I have declared a static array in main and want to use it in a function in another file.The function will be called from main itself.How should I proceed with it?Will passing the array as pointer while calling the function from the main be fine?It will be great if you can explain the scope of the static array that is declared in main. --Thanks!! Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259116
  - 4
    - linker error Hello, I've made a static lib using VSC++. I'm trying to call the library routine in another project that uses DDK compiler and I'm getting the following error advanced.obj : error LNK2019: unresolved external symbol "int __stdcall SaveXml(struct _XmlPortParams *)" (?SaveXml@@YGHPAU_XmlPortParams@@@Z) referenced in function "int __stdcall AdvancedDlgProc(struct HWND__ *,unsigned int,unsigned int,long)" (?AdvancedDlgProc@@YGHPAUHWND__@@IIJ@Z) objchk_w2K_x86\i386\Ctibhnp.dll : fatal error LNK1120: 1 unresolved externals I've even declared the function in librarry as __stdcall but that also does not solve the problem. Any idea how to resolve this? Thanks, Hablu Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259108
  - 5
    - Help converting malloc to new Hi, I am new to c++ and I am converting a c program to c++. I changed malloc call to new and I am getting an exception violation. Here is the relevant piece of code. Compiler vc++ 7.0 (.Net 2003) SQLINTEGER nCols; SQLINTEGER cbColDataLength; PBYTE* pColumnData = NULL; === C style ==== pColumnData = (PBYTE*) malloc(nCols * sizeof(PBYTE)); pIndicators = malloc(nCols * sizeof(SQLINTEGER)); pColumnData[nCol] = (PBYTE) malloc(cbColDataLength) === C++ style ==== pColumnData = new PBYTE [nCols * sizeof(PBYTE)]; pIndicators = new SQLINTEGER [nCols * sizeof(SQLINTEGER)]; pColumnData[nCol] = *(new PBYTE [cbColDataLength]) I tried using my logical understanding of pointers but the compiler kept throwing me out. So looking at the compiler messsages I got it to compile by using the above syntax. Please help me in figuring out if this is correct. Thanks Prahalad Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259090
  - 6
    - IAsyncResult and AsyncResult anyone know the difference between the 2? Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259088
  - 7
    - Creating folder, file - writing to file I need to create a folder on "C:\", then create a text file on "C:\\NewFolder", then write data to my text file. Is there a way to do this in this environment (or perhaps a better way in standard C)? Thanks ! Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259080
  - 8
    - parameter passing between VC and VB Google is not my friend tonight. Or I am just being too impatient. Anyway can someone point me to relevant MSDN articles (or other up-to-date technical info) regarding parameter passing between C DLLs and VB programs. I haven't done that since the 16-bits days (VC1.5 & VB3). I hope to be able to use my old, trusty VC6, and the client would be VB.net. Not VB6, does that make a difference? I suppose I am really asking if VB.net is allowed to call unmanaged code. I seem to recall some special header was needed in order to be able to access (and return) VB strings from C. Has accessing non-Unicode C-style (zero-terminated) strings gotten any easier from the VB side, these last 10 years or so :-) Thanks in advance for pointers and hints, Bernard. (yes, this is cross-posted to vc.lang and vb.winapi; apologies to whomever it irks ;-) Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259079
  - 9
    - __imp_ Linking question I've looked around and tried several suggestions on this topic, but to no avail. The program is C++ and getting LNK2019 error when trying to link in C functions from a DLL. I'm using eVc++4.0. The header file of the DLL looks like this. #define VEOCAMAPI_API __declspec(dllimport) extern "C"{ VEOCAMAPI_API HRESULT CamOpen(HANDLE* phCam); } I did a DUMPBIN /imports /symbols, and found this line: 0AD 00000000 UNDEF notype () External | __imp__CamOpen So the __imp__ is being added by the __declspec(dllimport) A DUMPBIN /exports /symbols on the library shows this line 5 4 00006D04 CamOpen So the linker says: error LNK2019: unresolved external symbol __imp__CamOpen referenced in function If I remove the VEOCAMAPI, The linker gives this error error LNK2019: unresolved external symbol _CamOpen referenced in function So how do I deal with the extra _ attached to the front of the function name? Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259077
  - 10
    - VS2005 is blocking when compiling two projects simultaneously VS2005 has the possibility to start several project builds in parallel. I found it nice, because I have a dual core. But I found, that there might be problems with this feature: The two build processes might block, if they work on the same file. (or perhaps on files in the same directory) The build process can be stopped without problems but the build can't be restarted corrrectly. Temporarily I switched back to compile only one project at a time, but I would prefer this feature to work correctly. Is it already a known bug, is there a Service Pack with fix? P.S. I think the developers of VS2005 will not get any reports through WinQual/OCA because the stopping of the build process breaks the deadlock. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259067
  - 11
    - Sector reading and writing Hi All, I have problem in reading and writing to the sector beyond 6GB of data. The direct function Calls are used to deal with sector reading and writing. // First a handle is created using the following code. CreateFile(_devicename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); // Then it is made to point to sector using the following. SetFilePointerEx (hDevice, L,&L1, FILE_BEGIN) //Reading of the sector is done using the following ReadFile (hDevice, buffer, 512*numberofsectors, &bytesread, NULL); //Writing to the sector is done as follows. WriteFile (hDevice, buffer, 512*numberofsectors,&byteswrite, NULL); I got the program in MSDN to know the hard disk details, so sure with size of sector. Reading and writing is done on block of the sectors, i.e, 100 * 1024. I am creating a image file of the read sector, and using this image file I am restoring back the contents of the disk or drive. There is no problem in reading and writing of data till 6GB it is working fine with no loss of data. Beyong 6Gb, I am able to create the image, but after writing the data i am unable see the contents. No files can be seen, but the size is reflected. But after that whats actually happening, not able to track it. Program is written in VC++.Net on Windows XP. Is there any limit or restriction of the harddisk or OS(whatever dont know exactly) after certain amount of data. Kindly suggest if any idea regarding this. Regards, sumana. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259065
  - 12
    - How to control Context Menu Is there any way to control the Context Menu through programming. I created my own file type in Windows Explorer. I added my own Context menu handler in that. Now I want to Customize the menu. Is there any way to not to add a some text (types) in it. or is there any to stop displaying some text for my extension Let me know if u need some more information Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259061
  - 13
    - Why do mt.exe crash during linking??? When I am trying to build my solution, I get the following error: ------ Build started: Project: ri, Configuration: Debug Win32 ------ Embedding manifest... Project : error PRJ0002 : Error result -1073741819 returned from 'c:\Program Files\Microsoft Visual Studio 8\VC\bin\mt.exe'. Build log was saved at "file://c:\prosjekter\jobb\Laerdal\SAPS\module_ri\ri\Debug\BuildLog.htm" ri - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 45 up-to-date, 0 skipped ========== Has anyone seen this error, or found a solution to the problem? Other developers in my team has also seen this problem, but none of us knows why this happens, and why it suddenly dissapears. Hope somebody can help me, I am totally stuck! Has tried: - Rebuild - Restart Visual Studio - Restart PC. This is an unmanaged C++ application, upgrader from VC 6.0 Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259060
  - 14
    - Why does MSDN say this is c++? I did a search for semaphore c++ and came across this page: http://windowssdk.msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref22/html/T_System_Threading_Semaphore.asp I look under the sample for C++ and in part it has things like (I snipped a lot of code): #using <System.dll> public ref class Example { private: static Semaphore^ _pool; public: static void Main() { _pool = gcnew Semaphore( 0,3 ); for ( int i = 1; i <= 5; i++ ) { Thread^ t = gcnew Thread( gcnew ParameterizedThreadStart( Worker ) ); } } private: static void Worker( Object^ num ) { ... } }; AFAIK #using <System.dll> is not C++. static Semaphore^ _pool; is not C++. Thread^ t = gcnew Thread(... is not C++. Why does MSDN say this is C++ when it is obvoiusly something else? Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259055
  - 15
    - I would like to use SHXXX Functions Dear Gurus, I would like to SHXXX Functions but some of the functions could not be able to use it. I checked my shell32.dll version it is about 5.0.8 I checked in my Include folder for necessary header file but none of them i have found. Now I need is, Is there any way to use those functions in my c Program Let me know if u need some more information Eagerly waiting for ur reply Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259053
  - 16
    - Moving and copying files I'm working on a utility program to move files from one directory to another at a controlled rate and under controlled circumstances. My logic is such that if MoveFile returns an error (from/to different media) it defers to CopyFile with deletion of the original file. The problem is I can't test the logic because I can't get MoveFile to fail. Even if I'm trying to move a file from my hard drive to the network it won't fail. In general that's good but I can't guarantee what it will behave that way in all circumstances. First, could someone explain to me what it won't fail? Does MoveFile have a built in CopyFile? Second, is there a way to force it to fail so I can track the logic to make sure that I'm putting out a viable program? TIA, Lilith Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259045
  - 17
    - How to make the file undeleteable Hi, My project requires a configuration file undeleteable by a user on a Windows system. I'm wondering if any simple way to achieve it. Thanks Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259037
  - 18
    - thread-safeness and static CStrings I have some statically defined strings, as in: static CString strThisIsStatic = "Hello"; I have a thread that references my static CStrings with statements like: CString m_LocalString; m_LocalString = strThisIsStatic; if (m_LocalString.CompareNoCase(strThisIsStatic)) ... I am never modifying the strings ocntained within those staticall-defined CStrings. Is it thread-safe to do the above kind of referencing to statically defined CStrings? In general, is it thread-safe to reference statically-defined objects, as along as I never do anything to modify the statically-defined objects from with the thread? - Roger Garrett Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259034
  - 19
    - windows.h winsock.h and winsock2.h problem Hi, When compiling some program which included a header file from a library I created I got a lot of errors saying that struct etc in winsock2.h where already defined in winsock.h. Looking through the windows.h winsock2.h and winsock.h I noticed that apparently winsock2.h should always be included before winsock.h. Doing that seemed to have solved the problem. However since windows.h is normally the first file included in stdafx.h I have to remember with every project to include winsock2.h manually before it. Am I doing something wrong and or is there a better way to do this? I'd rather not have to remember this kind of stuff but just be able to include a header file when I need it. -- Regards, Ron AF Greve http://moonlit.xs4all.nl Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259032
  - 20
    - ConvertStringToBSTR Linker error Hi there, I'm having linker problems with the ConvertStringToBSTR function. I have included comsupp.lib as this thread suggests... http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=145979&SiteID=1 But it is still not working. If I run a search for comsupp.lib on my PC I come across it in the following paths, C:\Program Files\Microsoft Platform SDK\Lib\AMD64 C:\Program Files\Microsoft Platform SDK\Lib\IA64 C:\Program Files\Microsoft Visual Studio 8\VC\lib C:\Program Files\Microsoft Visual Studio 8\VC\lib\amd64 I am not including any of the AMD ones either in VC's global directories or the projects specific directories, but the following is... C:\Program Files\Microsoft Platform SDK\Lib\ Does it automatically recurse the directories? The only one out of those directories that is included is the "C:\Program Files\Microsoft Visual Studio 8\VC\lib" one. Any suggestions on this would be really helpful.. as mentioned above, I have actually included comsupp.lib in the linker inputs for the project. Thanks loads in advance Nick. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259024
  - 21
    - Why don't I get warning C4700 calling a method of an uninitialized Why, in the code below, does the line commented "no warning" fail to generate compiler warning C4700? I'm using Visual Studio.NET 2005. class CMyClass { public: CMyClass() : i(0) {} const CMyClass& func() {return *this;} int i; }; int _tmain(int argc, _TCHAR* argv[]) { CMyClass s5 = s5.func(); // no warning CMyClass s3 = s3; // warning C4700 } Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259019
  - 22
    - Create, open, and write to a text file Is there a construct in VC that can do all / any of these ? Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259014
  - 23
    - SetParent() from WS_POPUP I am creating a ListView through CreateWindowEx(). It works fine when I create it as a child window as so: hControl = CreateWindowEx(WS_EX_CLIENTEDGE, WC_LISTVIEW, NULL, WS_VISIBLE | WS_CHILD | LVS_REPORT, 300, 100, 100, 100, hWnd, NULL, NULL, NULL); However, I want to create the control with no parent, then add it to the parent form later. Something like this... hControl = CreateWindowEx(WS_EX_CLIENTEDGE, WC_LISTVIEW, NULL, LVS_REPORT, 300, 100, 100, 100, NULL, NULL, NULL, NULL); SetParent(hControl, hWnd); The drawing of the ListView in that code goofs up the window drawing. I played arround a bit and came up with this: hControl = CreateWindowEx(WS_EX_CLIENTEDGE, WC_LISTVIEW, NULL, WS_POPUP, 100, 100, 100, 100, NULL, NULL, NULL, NULL); SetParent(hControl, hWnd); dwStyle = GetWindowLong(hControl, GWL_STYLE); dwStyle &= ~(WS_CLIPSIBLINGS | WS_POPUP); dwStyle |= WS_CHILD | WS_VISIBLE | LVS_REPORT; SetWindowLong(hControl, GWL_STYLE, dwStyle); ShowWindow(hControl, SW_SHOW); This works for the drawing, but if you right click in the header area, you will get a stack error. Any ideas? Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259013
  - 24
    - stl map/set and multithreading Hi All, I've got a question regarding using STL map and set class in a multithreaded situation. I'm developing a database program. The program fetches and parses millions of records from the database and build a map/set to allow faster access to records by certain rules. The type of map/set is: map<long, set<long> > m_map; It maps "category id" to a set of "record ids". So that I can easily get a set of record IDs by accessing m_map[CATEGORY_ID] later on. The fetch-and-parsing process is very long, and it takes more than 3 minutes in usual cases. So you know, during this period, I wanted to give the user some feedback on the UI, hopefully to show some already parsed records to users. So I put the parsing process in a background thread, it's doing all the fetching job and stuff such as m_map[CATEGORY_ID].insert(RECORD_ID);. And the UI access the map every few seconds, to fetch out record IDs. Of course, first, it used map<long, set<long> >::const_iterator to remember "CATEGORY_ID", and set<long>::const_iterator to remember the current position of RECORD_ID in the set, do a little iteration, and fetch all the relevant record IDs out. (well, during this process, the background thread is still running) I noticed that if I let the background thread finish before attempting to refresh the UI, it works flawlessly. But if I do what's planned above, refresh UI every few seconds, some how lots of records were slipped out. The debug message shows 100 m_map[CATEGORY_ID].insert(RECORD_ID) insertions (of course RECORD_IDs are all different), but the size of the set is only like 40 items or 30 items, it's random. I further checked the debug message and found that the thread is running fine with no errors or exceptions, all records are parsed the way they supposed to be. Now, why is the number of set entries less than the number of insertions (again, keys are all different)? My guess would be some kind of protection, when another thread is accessing the set, all insertions are dismissed. Is that true? How do I avoid this? I even tried pausing the thread while the UI refresh process and got no luck. I don't think it's a problem with compile settings, relevant options are all checked. Any help will be much appreciated. Thanks in advance, -- He Shiming Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259001
  - 25
    - stdext::checked_array_iterator problem In Visual Studio 2005 (beta 2, we hope our company will roll out the final version soon), std::copy gives a compiler warning if you try to copy to an unchecked buffer. It wants you to use stdext::checked_array_iterator instead of a simple pointer to the buffer, so I changed: char* mBuffer; to stdext::checked_array_iterator<char*> mBuffer; and std::copy now works fine. Unfortunately, now the simple and valid line mBuffer[0] = 0; triggers a debug assert. Inspecting <iterator>, it appears that the debug check that is done in operator[] does not accept an offset of zero! The question is: Is this a bug or a feature? If it is a bug, does anybody know whether it is fixed in the final version of 2005? And is there a work-around, other than writing our own checked_array_iterator? We may do that eventually anyway, so we can use the same code on WinCE as well, which does not have the stdext::checked_array_iterator at all, but it would be a lot easier if we could use the standard stdext::checked_array_iterator on WinXP at least. Thanks for any help, regards Mark Stijnman Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 259000
- Next
  - 1
    - How to find the owner name of a file Dear Gurus, I want to get the Owner name of a file or directory. Is there any way to get it ? Waiting for ur reply Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258998
  - 2
    - Injecting code into another process hi Im looking for instructions on how to this. For exemple : some dll loaded into my process , uses GDI calls. I would like to replace THEIR call(s) to a API with my code, specificaly CreateDIBSection. is that possible ? thanks Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258996
  - 3
    - AddPrinterDriverEx Hello, I am trying to automatically install a printer driver, but I am having problems with the AddPrinterDriverEx() function on Win2000 systems. The following code works on WinXp and Win2003 but it doesn't work on Win2000, the error returned is: "file specified non found". Why? char driverPath[255], dataFile[255], configFile[255], helpFile[255]; strcpy(driverPath, "C:\\TEMP\\PSCRIPT.DLL"); strcpy(dataFile, "C:\\TEMP\\ADIST5.PPD"); strcpy(configFile, "C:\\TEMP\\PSCRPTUI.DLL"); strcpy(helpFile, "C:\\TEMP\\PSCRIPT.HLP"); DRIVER_INFO_3 info; info.cVersion = 3; info.pName = "Acrobat Distiller"; info.pEnvironment = "Windows NT x86"; info.pDriverPath = driverPath; info.pDataFile = dataFile; info.pConfigFile = configFile; info.pHelpFile = helpFile; info.pDependentFiles = NULL; info.pMonitorName = NULL; info.pDefaultDataType = NULL; bool ret; ret = (0 != AddPrinterDriverEx(NULL, 3, (unsigned char *) & info, APD_COPY_NEW_FILES | APD_INSTALL_WARNED_DRIVER)); DWORD lasterr; lasterr = GetLastError(); FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, lasterr, 0, pErrore, 255, NULL); Help me... Thanks, Luca Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258995
  - 4
    - SHFileOperation Dear all, I'm having a strange problem with SHFileOperation, I have the following function: void CopyFolder ( LPCSTR sSourceFolder , LPCSTR sDestFolder ) { SHFILEOPSTRUCT SHDirOp ; //Directory Copying ZeroMemory ( & SHDirOp , sizeof ( SHFILEOPSTRUCT ) ) ; SHDirOp.hwnd = NULL ; SHDirOp.wFunc = FO_COPY ; SHDirOp.pFrom = sSourceFolder ; SHDirOp.pTo = sDestFolder ; SHDirOp.fFlags = FOF_MULTIDESTFILES | FOF_NOCONFIRMMKDIR | FOF_NOCONFIRMATION ; //The Copying Function SHFileOperation ( & SHDirOp ) ; } and when I call this: _stprintf ( tmp , _T ( "%s\\%s\\%s" ) , csCurrDir.GetString() , OUT_PATH , IMAGE_PATH ) ; CopyFolder ( _T ( "C:\\Temp\\image\\*.*" ) , tmp ) ; it works fine, however if I tried to substitute the hard string to CopyFolder as well like: TCHAR * tmp1 = new TCHAR [ MAX_PATH ] ; // = 260 _stprintf ( tmp , _T ( "%s\\%s\\%s" ) , csCurrDir.GetString() , OUT_PATH , PDF_PATH ) ; _stprintf ( tmp1 , _T ( "%s\\%s\\*.*" ) , csCurrDir.GetString() , IMAGE_PATH ) ; CopyFolder ( tmp1 , tmp ) ; It fails miserably with an error "Cannot Copy File:" .. I have walked through this in debug and tmp1 is filled with "C:\Temp\image\*.*" in the end and I have no idea why it won't work... the project is using UNICODE for info. If you have any ideas, please enlighten me... Regards, Julius Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258990
  - 5
    - How to Get Exit status of an Unexpected End of an Exe Dear Gurus, I had written an .exe which will be running at the backend. Any User can able to stop the .exe by Choosing Endprocess in the Task Manager. I need, when the user Ends the process. I need to do some clean up so how to get the End Information of an .Exe when the user chooses End Process in Task Manager waiting for ur reply Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258984
  - 6
    - _strnicmp vs. strncmp Both _strnicmp and strncmp are documented in MSDN's Run-Time Library Reference _strnicmp, _wcsnicmp, _mbsnicmp vs. strncmp, wcsncmp, _mbsncmp What're the purposes of having both? What's the meaning of underscore for C Run-Time Library functions? Thanks in advance! Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258978
  - 7
    - Event vs. Semaphore From a CodeProject article: "I have discovered that far too many people use an Event instead of a Semaphore to do synchronization. They are intended to solve different problems, and one does not address the problem domain of the other." In what situations should use Event instead Semaphore? Thanks in advance! Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258977
  - 8
    - Question of a post The following paragraph is from a thread days ago about "thread safe vector class": Would it be safe enough to synchronize access to a single element, such that simple statements like Thread A { a = vector[i]; } Thread B { vector[i] = b; } ? That would be easy, but that would not help for statements like vector[i] = 2 * vector[i] + 1; What does the author mean by "not help for statements like vector[i] = 2 * vector[i] + 1;"? Thanks in advance! Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258976
  - 9
    - General windows c++ question The WinMain routine is defined as: INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ) { and 'INT' and 'WINAPI' is typedef which is defined in the header file windef.h I do not understand why redefine native types with upper case names? I don't see the strategic values to it. Why is this better? Thank you. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258975
  - 10
    - Is CSocket thread-safe? I'm writing an MFC C++ dialog-based application. In it I create a number of threads. Within each thread (and local to each thread) I have a CSocket object and do the Create method on it. Ocassionally the Create fails. It's at the place in the CAsyncSocket::AttachHandle() where it's doing the: if (!pWnd->CreateEx(0, AfxRegisterWndClass(0), _T("Socket Notification Sink"), WS_OVERLAPPED, 0, 0, 0, 0, NULL, NULL)) That does a call to AfxRegisterWndClass(0). Within that method, at the point near the end where it's doing the following: // otherwise we need to register a new class wndcls.style = nClassStyle; wndcls.lpfnWndProc = DefWindowProc; wndcls.cbClsExtra = wndcls.cbWndExtra = 0; wndcls.hInstance = hInst; wndcls.hIcon = hIcon; wndcls.hCursor = hCursor; wndcls.hbrBackground = hbrBackground; wndcls.lpszMenuName = NULL; wndcls.lpszClassName = lpszName; if (!AfxRegisterClass(&wndcls)) AfxThrowResourceException(); It ends up failing on the AfxRegisterClass(&wndcls) and causing it to throw the exception. When I add a mutex to assure that only one thread can call the Create to CAsyncSocket, it doesn't fail. It only fails when the threads are free to run in parallel. It appears that CAsyncSocket is not thread-safe. Is it supposed to be thread-safe? Roger Garrett Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258970
  - 11
    - Interfacing with a VC++ Class in LabView (Exporting the Class in a DLL) Hello all, I have developed a Visual C++ DLL that will be used in one of our LabView projects. The Visual C++ project has two classes that perform the duties needed. The interface methods for the class have been made public so they are accessible. There are also two function with are essentially procedural C functions for calculating the CRC for messages. When we attempt create an interface to the DLL using the "Call Library Function Node" the "Call Library Function" window only shows the two procedural C function calls that were declared as follows __declspec( dllexport ) uint16 __stdcall ComputeCRC16( uint8* dataPtr, uint32 length ); __declspec( dllexport ) bool __stdcall IsCRC16Valid( uint8* dataPtr, uint32 length ); For the class that I would like to export I declared it as follows class __declspec(dllexport) LRUInterface { // ... } I would assume that LabView would be able to access the class, instantiate an object then access the methods, but it just doesn't seem to work. How do I declare the class properly so LabView will be able to use the DLL correctly? Mark Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258964
  - 12
    - Visual Studio 2005 and ISO C++ Names (Repost) Hello The following message was posted at comp.std.c++ initially. Since its slightly OT for that group I am reposting it here. When I tried to simply forward the post here it didn't seem to work. So I am creating a new post. Apologies in advance if it causes a redundant entry. ==Message follows====== Some of the code we write at my company runs on both UNIX systems (mostly AIX) and Microsoft Windows systems. The code which was originally written on UNIX contains a number of Posix function calls, many of which compile and execute properly on Windows. We have recently begun using the Microsoft Visual Studio .net 2005 compiler and we now getting the following warning message about a number of Posix calls. .\wuu.c(790) : warning C4996: 'unlink' was declared deprecated C:\Program Files\Microsoft Visual Studio 8\VC\include\stdio.h(290) : see declaration of 'unlink' Message: 'The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _unlink. See online help for details.' Does anyone know what the reason for this is? I've read every C and C++ book I own and searched the internet trying to find an explanation for this change. For the life of me, I can't see how "_unlink" is any more ISO C++ conformant than "unlink". PS - Even after reading the charter of several newsgroups it wasn't clear to me where a question like this belongs, so I cross-posted this to a Windows newsgroup, figuring perhaps people there have heard an explanation from Microsoft which I missed, and a C++ and UNIX newsgroup, figuring you might have some insight on the issue of ISO C++ and Posix names. If there are more relevant groups, please redirect the discussion as you see fit. -- Tom Einertson E-mail: t...@siemens-emis.com SIEMENS Power Transmission & Distribution Phone: (952) 607-2244 Energy Management & Automation Division Fax: (952) 607-2018 10900 Wayzata Boulevard, Suite 400 Minnetonka, MN, 55305 =========Message ends============================== Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258963
  - 13
    - strnicmp I was getting a warning in VS 2005 about this so I changed it to _strnicmp. Now I get this pretty confusing warning: d:\nist sp 800-73 piv reference implementation 20050625\card reference implementation\code\piv\refimp\java_card_manager\java_card_manager.cpp(53) : warning C4996: '_strnicmp' was declared deprecated d:\vs2005\vc\include\string.h(150) : see declaration of '_strnicmp' Message: 'The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _strnicmp. See online help for details.' Any idea why '_strnicmp' isn't the same as '_strnicmp'? I'm baffled :-) Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258961
  - 14
    - ASCII Date time to ticks from 1970 Hi, I need to convert say Tue 19:00:23 5 March 2006 to ticks from 1970 What is the easiest way to achieve this? Thanks Jack Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258958
  - 15
    - localtime() thread-safe or not? localtime() C Runtime API is documented (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_localtime.asp) to return result in static memory, which, of course is not thread safe. However, indirect evidence (http://support.microsoft.com/default.aspx?scid=kb;en-us;104641) appears to suggest that localtime() actually uses Thread Local Store which makes it thread safe. So my question is -- is localtime() really thread safe or not? Thank you Mark. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258953
  - 16
    - request to solve my problem hello friends this is vijay,i got a problem while doing my project based on vc++ (i.e)"How to implement Fit Window feature in VC++6.0 in an MDI Application" if any of you got any idea about that please do reply me with the proceedure.i will be waiting for your reply bye with regards vijayprasadreddy Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258948
  - 17
    - While-Statement Just a quick question I'd like to ask as I've always wondered the answer to this. Suppose you have the following code... while (1) { // Some code in here that doesn't have WaitForSingleObject() // Maybe something really simple... x = 1; } Why is it that this code will consume 99% of the CPU when looking at it through task manager? However, I have other tasks running that consume approximately 0-1% or a fraction of the CPU power that are actually monitoring stuff. How do they incorporate an infinite loop that consumes very little CPU power? Is it possible to emulate their infinite loop? I've tried the following before... while (1) { // Statements Sleep(1000); } But I know that's probably not the best approach. Thank you. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258944
  - 18
    - Need Wait Cursor (IDC_WAIT) after thread complete or within thread process. In my application (in ATL/COM) for doing some lenghty processing i have created thread.This lenghty process starts with the some dialog box event OnOk(), that dialog box is appearing on the MDI form . I want to notify user that process is yet to be completed by showing wait cursor (IDC_WAIT). For that i have used these efforts:- 1.I have simpliy used :- HCURSOR hCursor; hCursor = AfxGetApp()->LoadStandardCursor( IDC_WAIT ); ::SetCursor( hCursor ); or ::SetCursor(::LoadCursor(NULL,IDC_WAIT)); but could not able to solved the problem. 2.Secondly i called called UI event by internally advising thread to Notify some events that are declared in my IDL. In that i can get WaitCursor for partially. 3.I am trying to use AfxGetApp()->RestoreWaitCursor(); and other function of that ,since in application we haven`t use MFC , so this code is run fine but could not work . I have refer http://www.codeguru.com/forum/archive/index.php/t-290461.html and http://www.codeproject.com/dialog/persistentwaitcursor.asp but could not got answer.If any one help me please send me your views and guide me. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258936
  - 19
    - HELP!! "msado15.dll" why this statement creating problem on other machine..where as it is working fine on PC where visual studio is installed #import "C:\Program Files\Common Files\System\ADO\msado15.dll" rename_namespace("ado26") _bstr_t m_Conn("Provider=MSDAOSP; Data Source=MSXML2.DSOControl.2.6;"); do i need XML driver .... if yes where can i find it... Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258934
  - 20
    - Get Rich Take advantage of a great deal Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258928
  - 21
    - what is the difference between type library and dll? Hello All, I have started learning COM recently and getting confused at each step. I have following question.. what is the difference between type libraries and dlls? as both store the COM object. Regards, Yogesh Joshi Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258924
  - 22
    - initialize array within a class by a class member I have a class date Date { public: char sDate; int nDate; Date(); virtual ~Date(); }; and a class month class Month { public: int noofdates; Date dateArray [noofdates]; lMonth(); virtual ~Month(); }; I want to define an array of class Date based on another member variable no of dates (could be 28, 29, 30, 31) in class month. How do I initialize the dateArray in without knowing no of dates? Thanks! Greg Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258921
  - 23
    - Size of array's dimensions Hi, How do I get the size of any dimension of a multidimensional array with the sizeof operator? If I have int my_array[M][N] and I use sizeof(my_array) I get the size of the whole array (all dimensions). How do I get the size of one dimension only? Thank you Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258917
  - 24
    - Direct3D and ATL window I have a project that requires us to seemlessly switch between a Direct3D window and a Flash window. My initial thought is to create the application with two main HWND's with only one visible at a time. One hosts Direct3D and the other hosts the IWebBrowser2 ActiveX control. To switch between the two, I'll just set the visibility to TRUE or FALSE on each of them. Any suggestions for alternative solutions? Is there a more elegant way to do this? Thanks! Gary. Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258911
  - 25
    - Protecting Files and Folders I have a windows application ( VC++, COM) which we distribute through an Installer. I want to ensure that nobody can delete any of the files under our install directory manually. Only legal way would be to un-install the application. I was wondering how can I get a lock on a top level folder so that nothing can be deleted from it. Any thoughts ? Thanks Sandeep Tag: Why should I code in header file [Visual studio C++ 2005]? Tag: 258904

Hi,

In VC++.Net 2005 visual studio, if I create a new winform drag and drop

a button, then double click it to write click event code, then it auto
generates the template code for the event in Form1.h file rather than
Form1.cpp file. This behaviour is against standard C++ coding
standards, where my header file is supposed to just have declarations.
I read in other topics that this is due to C# association of single
file concept with the winform.

Can someone (from MS or MS experts) explain why is this done? and how
can I avoid it to generate template code in header file and write my
code in .cpp file?

Thanks and Regards,
Shil

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Re: Why should I code in header file [Visual studio C++ 2005]? by Carl

Carl
Fri Feb 03 23:05:22 CST 2006

Shil wrote:
> Hi,

Please don't multipost (cross-post if necessary). See reply in
.dotnet.languages.vc

-cd

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