os with vc

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- Previous
  - 1
    - problems calling a function contained in a dll Good afternoon, I'm having difficulties loading a dll in Microsoft Visual Studio 2003, that was supplied to me by another company. They have supplied me with test code, which causes my program to crash, see below: #include "stdafx.h" #include "stdio.h" #include "stdlib.h" #include <windows.h> typedef bool (__fastcall* _ANT_Init)(unsigned char ucUSB_, unsigned short usBaud_); int _tmain(int argc, _TCHAR* argv[]) { HINSTANCE hDLLInstance; _ANT_Init ANT_Init; printf("Attempting to load DLL\n"); hDLLInstance = LoadLibraryA("ANT_DLL.dll"); if (hDLLInstance == NULL) { fprintf(stderr, "ERROR: Unable to load DLL\n"); return 1; } else { printf("Success: Loaded ANT_DLL.dll\n"); } ANT_Init = (_ANT_Init)GetProcAddress(hDLLInstance, "_ANT_Init"); if (ANT_Init(0, 50000) == true) { printf("Success: ANT Initialized Properly\n"); } else { printf("Fail: ANT Interface not found\n"); } FreeLibrary(hDLLInstance); printf("ANT DLL Freed\n"); return 0; } Whenever my program crashes, I get the following error message "Unhandled exception at 0x00000000 in program.exe: 0xC0000005: Access violation reading location 0x00000000." The company that supplied me, with the dll, say that they compiled it, with Borland C++. They also told me that to get my program to link the windows.h file in properly, that I need to have Windows PSDK installed . I've downloaded the latter of the Microsoft web site, but I still get the same error. From the following screen shot, you can see, that SDK seems to be installed correctly on my computer. Do you have any suggestions? Thanks in advance for your help, Regards, Alan Tag: os with vc Tag: 270544
  - 2
    - msdev - command line - stderr if I run something like msdev MyProgram.dsp /MAKE "ALL" /REBUILD > myBuild.log 2> myBuild.err from the command line. I would expect any build errors be put in myBuild.err. but regardless of if MyProgram.dsp compiles myBuild.err is empty. Is there an easy way to get just if the program compiled? and not have to wade through miles of log files. using Visual C++ 6. Thanks How Tag: os with vc Tag: 270538
  - 3
    - STATUS_SXS_EARLY_DEACTIVATION with VS2005 I have an app (out-of-proc inplace server) written with VS2003 (C++/MFC), which works fine. Now it has been recompiled with VS2005 C++ compiler and I get STATUS_SXS_EARLY_DEACTIVATION. The libraries in the new 2005 compiler supports activation contexts and it seems that this now causes the problem. No code has been changed. Any suggestions? ///JÃ¸rn Tag: os with vc Tag: 270532
  - 4
    - Problem in Auto detecting Codepage Hi, I am trying to Auto Detect the codepage for a txt file (containing English and other language characters as well). The txt file is saved in UTF-8 format. For this i tried using IMultiLanguage2::DetectInputCodepage using MLDETECTCP_NONE. In this, i am facing a problem that for certain files it is able to detect the actual codepage wheras for others it simply return English Codepage as output. Here is the relevant piece of code that i am using (CoCreateInstace being already done). if(S_OK == mycodePageRecognizer.GetIMultiLanguage2(&pMultiLanguage2)) { XInterface<IMultiLanguage2> xMultiLanguage2; xMultiLanguage2.Set(pMultiLanguage2); pMultiLanguage2 = 0; INT pcSrcSize = myserialStream.GetNewFileSize(); DetectEncodingInfo myEncodings[1]; INT cEncodings = sizeof(myEncodings) / sizeof(DetectEncodingInfo); HRESULT hr = xMultiLanguage2.GetPointer()->DetectInputCodepage(MLDETECTCP_NONE, 0, pSrcStr, &pSrcSize, myEncodings, &cEncodings); if (SUCCEEDED(hr) && cEncodings > 0) { myulCodePage = myEncodings[0].nCodePage; } } Taking an example, if i am having a text file with English and Japanese characters, it worked fine if the file consisted of 199 character but was not working for 200+ characters. On increasing it to around 250 it again started working fine (Returned the correct codepage). I know it is not having any co-relation with the size but still giving it as an example. **** Again i am telling that the file is saved in UTF-8 format (Also it worked fine for any number of characters if saved in UTF_16 BE or LE formats). Please help me in finding where exactly am i going wrong. Thanks and Regards, Shreshth Luthra Tag: os with vc Tag: 270522
  - 5
    - Bug in x64 strncpy() in PSDK msvcrt.dll The following test case will cause GP fault when run using the PSDK x64 compiler. The x86 library seems to handle this case just fine. The issue is having a string without a null terminator that aligns itself onto the very end of an allocates region such that strncpy() will run right off the end looking for the terminating '\0'. This problem persists in Vista x64 RC2. The test case does not verify that the next page is unallocated and you could be unlucky and have the test case work if that were to happen. I have not tried this with VS2005 x64 library. The workaround is to use memcpy() since I know the exact length of the string. #include <windows.h> #include <stdio.h> void main(void) { char *buffer; char *ptr; int len = 8; char Str[30]; SYSTEM_INFO info; register int ii; // Figure out the page size GetSystemInfo(&info); // Allocate a chunk of memory // Exactly one page in length buffer = VirtualAlloc(0, info.dwPageSize, MEM_COMMIT, PAGE_READWRITE); // Get a pointer to the last 8 bytes ptr = buffer + info.dwPageSize - len; for (ii=0;ii<len;ii++) { ptr[ii] = 'a' + ii; } // pass that to strncpy(); strncpy(Str, ptr, len); Str[len] = '\0'; } Tag: os with vc Tag: 270501
  - 6
    - Lengthy algorithm in a thread Hi Gurus, I am writing a lengthy algorithm in my thread and notice that its execution time is about 4 secs. The issue I am having my CPU consumtion goes upto 90% when this algo is executed. In other words, when message for processing is posted to my thread it takes about 4 secs but also causes CPU to be 90%. I see in task manager spikes of around 80-90% marks indicating the time my thread processed the algorithm. I have tried to optimize my algorithm but can't avoid some loops (none of which are endless). Is there a way to get around this issue? How can bring down the CPU consupmtion although I am running my algorithm in a worker thread? Thanks Tag: os with vc Tag: 270487
  - 7
    - Need sample to read from db Hello, I need a sample code in order to read/write from oracle database 9i, by using the ADO engine. (Visual Studio 6.0 - Visual C++). Something like : 1) connect to db 2) make sql query (with / without parameters). 3) run the sql query 4) fetch the results 5) close query 6) run update query. 7) close connection. Thanks :) Tag: os with vc Tag: 270485
  - 8
    - Need sample to read from db Hello, I need a sample code in order to read/write from oracle database 9i, by using the ADO engine. (Visual Studio 6.0 - Visual C++). Something like : 1) connect to db 2) make sql query (with / without parameters). 3) run the sql query 4) fetch the results 5) close query 6) run update query. 7) close connection. Thanks :) Tag: os with vc Tag: 270481
  - 9
    - static variables cannot be used in multithread functions? Hi, all Recently I am playing with multithread programming, and I find that we cannot use static variables in thread function.The first thread can start but the second just freeze. Could anybody tell me why? #include "stdafx.h" #include "process.h" #include "windows.h" void func(void* szName) { // if this static is removed, then everything goes OK. static int a = 1; while(a<10) { printf("%s:%d\n", szName, a++); } } int main(int argc, char* argv[]) { printf("thread1 starts\n"); _beginthread(func, 0, "t1"); printf("thread2 starts\n"); _beginthread(func, 0, "t2"); Sleep(5000); return 0; } this is the output: thread1 starts thread2 starts t1:1 t1:2 t1:3 t1:4 t1:5 t1:6 t1:7 t1:8 t1:9 Press any key to continue Tag: os with vc Tag: 270476
  - 10
    - Multi thread Hello, I need a sample of code of Visual C++ (Visual studio version 6.0) for : A server that get clients commands (i.e sql strings), and run each command on a separated thread. (The server waits for requests from clients). Thanks :) Tag: os with vc Tag: 270474
  - 11
    - Multi thread Hello, I need a sample of code of Visual C++ (Visual studio version 6.0) for : A server that get clients commands (i.e sql strings), and run each command on a separated thread. (The server waits for requests from clients). Thanks :) Tag: os with vc Tag: 270473
  - 12
    - Addressing Physical memory in XP using C++ I am using XP as an OS and I am using C++ programming language and need to write data to a physical address between 0xD0000 and 0xDFFFF I am aware that this OS used virtual memory so I may need to create a driver. I have download the windows DDK but have no experience with this and would like to get up and running very quickly can any one point me in the direction of an example that I could modify. I found a reference to an example program called GENPORT but can't seem to find any similar example in the latest DDK. I have also found an already written and complied driver called portTalk but this only allows you to talk to an addresses between 0x0000 and 0xFFFF. If anyone has any experience with this any help would be most appreciated. Thanks, Grant Tag: os with vc Tag: 270468
  - 13
    - Annoying compiler error ? Hi guys, I have compiler error: "c:\components\in-process\connectablecomponent\stdafx.cpp(5) : error C2850: 'PCH header file' : only allowed at file scope; may not be in a nested construct" It points to stdafx.cpp. How to solve this ? thank you Vilius Tag: os with vc Tag: 270458
  - 14
    - Stack frame incorrect on stack unwinding during exception I'm tracking down a problem where we're running into an access violation while unwinding the stack after throwing a C++ exception. From my investigation it appears the stack frame is not correctly setup. Below is an example of what I've observed. When I enter my function Validate() (shown below) esp = 0x4d6f62c and ebp = 0x4d6fbf4. Then it does: push ebp lea bp, [esp - 0x894] At which point esp = 0x4d6f628 and ebp = 0x4d6ed94. So the stack frame for Validate's locals should be ebp = 0x4d6ed94. And in fact [ebp + 0x830] is the 'this' pointer for Validate's STL string 'x' (when ebp = 0x4d6ed94). However, when I throw an exception in Validate() it ends up in a little piece of thunk code shown below: lea ecx, [ebp + 0x830] jmp std::basic_string::~basic_string() The offset from ebp is correct, but the value of ebp is 0x4d6f628 which is not correct. What happened? I did notice that this it the value of esp after the locals were accounted for in Validate(). Snippets of code: =========== #define T_OLEDB_ERR_DEADLY_STR(STR) do { Exception::raiseException(false, STR, __FILE__, __LINE__); } while(0) class TException { public: TException(const char *, int iExceptionCode = 0, DWORD dwIP = 0); TException(const char * pszMessage, const char * pszFileName, int iLineNumber, const char * pszHostName, int iExceptionCode = 0); virtual ~TException(); const char * GetMessage(); const char * GetFileName(); const char * GetHostName(); const int GetLineNumber(); const int GetExecptionCode(); const DWORD GetInstructionPointer(); static void InstallSEHandler(LPCTSTR sDir = NULL); private: static TCHAR s_sDir[MAX_PATH]; static void translate_SE(unsigned int u, _EXCEPTION_POINTERS* pExp); CStdString m_strMessage; CStdString m_strFileName; int m_iLineNumber; CStdString m_strHostName; int m_iExceptionCode; DWORD m_dwIP; }; class Exception : public TException { public: Exception(HRESULT hr, bool bRetryable, const char * pszMessage, const char * pszFileName, int iLineNumber, const char * pszHostName) : TException(pszMessage, pszFileName, iLineNumber, pszHostName), m_hr(hr), m_bRetryable(bRetryable) { } void SetDBInfo(HRESULT hr, CComPtr<IUnknown> &m_spUnk); static void raiseException(bool bRetryAble, const char*pszMessage, const char *pszFileName, int iLineNumber, HRESULT hr, CComPtr<IUnknown> m_spUnk, CComPtr<IUnknown> pFI, CDynamicAccessor &acc); static void raiseException(bool bRetryAble, const char*pszMessage, const char *pszFileName, int iLineNumber, HRESULT hr, IUnknown* m_spUnk, IUnknown* pFI); static void raiseException(bool bRetryAble, const char*pszMessage, const char *pszFileName, int iLineNumber, HRESULT hr, CComPtr<IUnknown> m_spUnk); static void raiseException(bool bRetryAble, const char*pszMessage, const char *pszFileName, int iLineNumber, HRESULT hr); static void raiseException(bool bRetryAble, const char*pszMessage, const char *pszFileName, int iLineNumber); HRESULT GetHR() { return m_hr; } bool GetRetry() { return m_bRetryable; } private: HRESULT m_hr; bool m_bRetryable; }; void Validate() { std::string x; . . . if (x.length != 0) T_OLEDB_ERR_DEADLY_STR(x.c_str()); } -- Thanks, Nick Tag: os with vc Tag: 270453
  - 15
    - _ttoi() family portable 32-bit and 64-bit Hi, Is there a more cute way to use the string conversion functions then this : CString szCategories; ... #if defined(WIN64) INT_PTR nCategories = _ttoi64(szCategories) #else int nCategories = _ttoi(szCategories) #endif Is there a function like this exist _ttoi_ptr() ? Regards, Eric Tag: os with vc Tag: 270450
  - 16
    - syntax error in INSERT INTO statement Hi all, I am trying to create, and write data into microsoft access file using CDaoDatabase and CDaoRecordset in Microsoft visual studio 8.0. I am new to working with databases. It is actually a example code from a website. The code is, CDaoDatabase database; CDaoRecordset recordset(&database); CString lpszFile = "C:\\Database.mdb"; database.Create(lpszFile); //database.Open(lpszFile); _ASSERTE( _CrtCheckMemory( ) ); CString SqlCmd ="CREATE TABLE MINECOORDINATES (X VARCHAR(10)" ", Y VARCHAR(10)" ", Z VARCHAR(10))" ; database.Execute(SqlCmd); recordset.Open(AFX_DAO_USE_DEFAULT_TYPE, "SELECT * FROM MineCoordinates", 0); database.Execute("INSERT INTO MineCoordinates(X);"); database.Execute("INSERT INTO MineCoordinates(Y);"); database.Execute("INSERT INTO MineCoordinates(Z);"); recordset.AddNew(); recordset.SetFieldValue("X","10"); recordset.SetFieldValue("Y","13"); recordset.SetFieldValue("Z","13"); recordset.Update(); recordset.MoveNext(); recordset.AddNew(); recordset.SetFieldValue("X","11"); recordset.SetFieldValue("Y","1"); recordset.SetFieldValue("Z","3"); recordset.Update(); */ COleVariant olevar; while(!recordset.IsEOF()); { olevar.ChangeType(VT_BSTR, NULL); recordset.GetFieldValue("X",olevar); CString strData = (LPCSTR)olevar.pbstrVal; // Code for inserting data into a listbox, for example recordset.MoveNext(); } At the run time i get an error stating, syntax error in INSERT INTO statement. Could anyone please let me know, what is the error here? Thank you, Priya Tag: os with vc Tag: 270445
  - 17
    - Debug version works but release crashes Hi, my console application works well if debug settings are used. Even if I build a release version and run it in the IDE everything is fine. If I execute the release version of the file, however, it crashes. If I trace the error using the debugger, it marks the following lines: ... struct Value { int var; int mv; }; ... vector<Value>::iterator iter_test; vector<Value>::iterator iter_cur; ... vector<Value> vTestVar; vector<Value> vCurVar; iter_cur = vCurVar.begin(); iter_test = vTestVar.begin(); ... // this section of the code tests if // vector A (vTestVar) is equal to vector B (vCurVar) if ((*iter_test).var == (*iter_cur).var) // same? { for(; iter_cur != vCurVar.end(); ++iter_cur) { iter_test = vTestVar.begin(); // test if (*iter_cur).mv is member in iter_test while ( ((*iter_test).mv != (*iter_cur).mv) && (iter_test != vTestVar.end())) ++iter_test; ... Any suggestion why it crashes? Why is it running with debug settings? Greetings, Arno Tag: os with vc Tag: 270440
  - 18
    - i'm a C++ beginer and i have a question. CLR Class Library In my head file: using namespace System; using namespace System::Xml; using namespace System::Net::Mail; namespace CPTest { public ref class clsSendMail { public: void getMailMessage(String^ v_Content); void doSendMail(); private: String^ v_MailContent; MailMessage objMailMessage; }; } In my cpp File: #include "stdafx.h" #include "CPTest.h" void getMailMessage(String^ v_Content) { objMailMessage= gcnew MailMessage("aa@aa.aa","aa@aa.aa","test mail",v_Content); return ; } .............. my question is : 1.why compiler told me "'objMailMessage' : undeclared identifier"? 2.In .Net class, when define an object of System::String. i have a problem just like this below. (for example: "String^ a;" is correct. But why "String a;" is wrong.) thanks. Tag: os with vc Tag: 270435
  - 19
    - GUI Feedback when positioning windows I'm using Visual Studio .net 2002 and C++/MFC: This question is along similar lines to mylast post - GUI improvement... Anyone know a good code sample I could read to help with the problem of feedback when dragging windows around. I have a number of floating/dockable windows in my application and dragging windows around is almost a random activity - more than 3 or 4 windows already docked, it is never clear where they will actually dock. There is some automatic feedback - the outline of the window is thick when it will land as a floating window and the border is thin when it is about to dock, but as I said already, this doesn't really help! How do I override and improve the feedback when moving docked windows? Also, a second question along similar lines - how do I force toolbars to dock in their own area around the outside of all windows. I don't want to be allowed to put any windows in the same frame (if it is a frame for toolbars?) as my toolbars. Thanks Tag: os with vc Tag: 270417
  - 20
    - Restrict toolbar locations... I'm using Visual Studio .net 2002 and C++/MFC: I would like to restrict my application GUI such that I prevent toolbars and floating/dockable windows from existing in the same 'frame'. I have 3 floating toolbars which can float and dock around the outside of my application. I also have several floating/dockable windows which at present are allowed to dock in the same area as a toolbar. For example if I have a window called "Project Browser Tree" docked on the left of my mainframe, then when the user drags a toolbar into the same area, the toolbar should dock on the extreme left of the application and the "Project Browser Tree" window should take up a space to the right of the toolbar and not be allowed to exist to the left, or even in the same area as the toolbar. At the moment, the toolbar docks above the "Project Browser Tree" window and squshes it down. Does this question make sense? And how do I achieve this restriction? Tag: os with vc Tag: 270416
  - 21
    - Managed class to unmanaged hi, I have a managed object from typr ref CX and i want to get is address to CX^ p How can i do that Tag: os with vc Tag: 270415
  - 22
    - warning LNK4221 with VS2005 but not with VS2003 Hi, I get this warning yywcsskp.obj : warning LNK4221: no public symbols found; archive member will be inaccessible when I compile a static library with VS2005. But the same project with VS2003 doesn't give this warning. And this warning seem to cause me problem when I want to link an application with this library. I got some unresolved external symbol like this my_lexer.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall yl::yywlexer::yyerror(unsigned short const *)" (?yyerror@yywlexer@yl@@UAEXPBG@Z) Can somebody help me ? Is it a VS2005 known bug ? Eric Tag: os with vc Tag: 270414
  - 23
    - How to hide other programme when it startup? i wanna hide the appointed programme when it startup,I used the APIHOOK to catch bitblt()showwindow() etc. functions,but can't realized. Is there a way to make this work ? Thanks for your tips. Tag: os with vc Tag: 270403
  - 24
    - EUC encoding with Visual C++? How would one go about reading a Japanese EUC encoded file in Visual C++? In MSDN, I looked up EUC and it said it was 51932, in the 932 family with JIS and SJIS. I tried opening my file like this: std::wifstream src; src.imbue(std::locale("ja_JP.euc-jp")); src.open(L"post.euc"); but it gave me a runtime error. So I inserted the code family instead, like below: std::wifstream src; src.imbue(std::locale(".932")); src.open(L"post.euc"); The program now runs, but the Japanese text is garbled. if I look at the file in Internet Explorer, the browser defaults on SJIS and I get the same garbled text. But if I manually change the display encoding to EUC, the files displays correclty. Is it not possible to use C++ do this? Will I need Win32 API file I/O functions instead? Tag: os with vc Tag: 270398
  - 25
    - strcat problem This is a multi-part message in MIME format. ------=_NextPart_000_0042_01C6F5F5.F257F0C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Is there a way to make this work ? char pszString[80]; pszString[0] =3D 0x00; ::strcat( pszString, "Set objXL =3D = WScript.CreateObject("Excel.Application")\n\n" ); I can't make the 3rd line work because of the double quotation marks ------=_NextPart_000_0042_01C6F5F5.F257F0C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1491" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Is there a way to make this work = ?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT color=3D#0000ff> <P><FONT face=3DArial size=3D2>char</FONT></FONT><FONT face=3DArial = size=3D2>=20 pszString[80];</FONT></P> <P><FONT face=3DArial size=3D2>pszString[0] =3D 0x00;</FONT></P> <P><FONT face=3DArial size=3D2>::strcat( pszString, "Set objXL =3D=20 WScript.CreateObject("Excel.Application")\n\n" );</FONT></P> <P><FONT face=3DArial size=3D2></FONT> </P> <P><FONT face=3DArial size=3D2>I can't make the 3rd line work because of = the double=20 quotation marks</FONT></P></DIV></BODY></HTML> ------=_NextPart_000_0042_01C6F5F5.F257F0C0-- Tag: os with vc Tag: 270385
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  - 1
    - How to init array of strings member by a constructor? I have tried the following: struct X{ string s[3]; ............. X(): s[0]("a"), s[1]("b"), s[2]("c") {}; // failes: C2059 }; 1. I hope it is clear that s is an array of 3 strings and not a string of 3 chars. 2. How to init such an array. Thanks, David Tag: os with vc Tag: 270384
  - 2
    - How do I hi-light menu item? How do you hi-light a menu(TrackPopupMenuEx) item? Note: HiliteMenuItem(...) works...sortof. It hi-lights the item but then when you use the arrow keys you see two hilights(yours and the real one). Tag: os with vc Tag: 270374
  - 3
    - How to adjust the font size in visual C++? The font in the editor is so small, I want to adjust it, but don't know how. Thanks for your tips. Tag: os with vc Tag: 270369
  - 4
    - checked iterators and /MD I'm tying to disable checked iterators in release builds defining _SECURE_SCL=0. On the other hand I'm using the multithreaded DLL runtime. This seems to have been built with _SECURE_SCL=1 defined. It also seems that it contains an instantiation of std::string. The net result is that the following code uses checked iterator which I would like to avoid in release builds. bool foo( const std::string& sstr ) { for ( std::string::const_iterator n = sstr.begin() ; n != sstr.end() ; ++n ) if ( ! isdigit( *n ) ) return false; return true; } Is there a workaround for this? Can I define something to force the compiler to use the STL headers instead of the code in the DLL runtime for std::string? Thanks in advance. -- Please remove "sam_" from email address. Tag: os with vc Tag: 270364
  - 5
    - vc7 to vc8 and back to vc7 vc8 converts vc7 files, but vc7 will not read vc8 files after conversion and vc8 leaves nothing behind for vc7 (same file names used). So, what is a person supposed to do when thier employer liscensed vc 7 at work and they have vc8 at home? I really don't see any logic in buying vc7 just to work on the same solution and projects I did at work, from home, when I already own 2005 professional. Tag: os with vc Tag: 270353
  - 6
    - Debug Build fails, Release Build OK - VC++ 6.0 to VS2005 port I'm trying to upgrade a large project from VS 6.0 to VS 2005. After fixing a lot of things that changed (mostly sloppy coding in the original project that VS2005 didn't allow), I got the release version to build successfully. Unfortunately, it crashes right away when I start it. So now I need to build the debug version. Unfortunately, the compiler gives innumerable error messages of the sort shown below. The #include file referenced here is included by way of <fstream> and its subsidiary files. The original project used <fstream.h> which no longer exists. Apparently the code syntax of my fixes satisfies the compiler, since the release version builds successfully. So maybe there is a switch I need to throw? But I can't find it. Searching MSDN, these newsgroups, etc., didn't turn up anything, but I'll be this is something that has been discussed in the past. Thanks in advance. -- C Gregory Tecmag, Inc. Compiling... AcqPropsDialog.cpp d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : warning C4229: anachronism used : modifiers on data are ignored d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2365: 'operator new' : redefinition; previous definition was 'function' d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2491: 'new' : definition of dllimport data not allowed d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2078: too many initializers d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2440: 'initializing' : cannot convert from 'int' to 'void *' Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2143: syntax error : missing ';' before '(' d:\program files\microsoft visual studio 8\vc\include\xdebug(32) : error C2226: syntax error : unexpected type 'size_t' d:\program files\microsoft visual studio 8\vc\include\xdebug(33) : error C2059: syntax error : ')' d:\program files\microsoft visual studio 8\vc\include\xdebug(36) : warning C4229: anachronism used : modifiers on data are ignored ....etc..... Tag: os with vc Tag: 270352
  - 7
    - Iterators are much slower than pointers The following code copies the contents of a string into a vector of chars a million times. The problem is that the version that uses begin() and end() iterators is much slower than the version that uses the begin and end pointers under Visual C++ 2005. (see comments) Is there a way to make both versions equal fast? I tried to define _SECURE_SCL to 0 before including the headers, but it doesn't make it faster. #include <iostream> #include <vector> #include <string> int main() { std::string s(2000, '\0'); for(int i = 0; i < 1000000; ++i) { // comment out one of the two lines before testing the code //std::vector<char> v(s.begin(), s.end()); // slow version, takes ~14 seconds //std::vector<char> v(s.data(), s.data() + s.length()); // fast version, takes ~1 second } } Tag: os with vc Tag: 270350
  - 8
    - compiling a dependancy .dll, where did the import library go? I did this before no problem, but for some reason when I complile my project as a .dll the output (in the debug directory) is only the .dll file and there is no corresponding .lib Everything on msdn claims that the compiler will generate this lib for you, but does not explain where the settings are to look at if it does not generate this lib. My executable needs this lib in order to use the .dll (implicit linking) Any ideas on what settings to look at? Tag: os with vc Tag: 270349
  - 9
    - Platform (native) development With each appearance of new version of .NET Framework I wonder if there is point in being stubborn in terms of native (Win32) development. So, the question for all experts is: Is there point in continuing use of Visual C++ or I/we should migrate to .NET (VC.NET). I am asking primarily because I am about to start developing application dealing with AVI (and other) files including some graphics. .NET in its current version(s) has no adequate support for this kind of files. On the other hand, native Win32 API is loaded with routines for this purpose. Again, the question is: Win32 or stop being stubborn and migrate to .NET? (I apologize if I picked wrong group to post this question) Tag: os with vc Tag: 270347
  - 10
    - Platform SDK new version ? Hi, After new release of IE7, I'm wondering when new version of platformSDK will be released ? thank you Vilius Tag: os with vc Tag: 270345
  - 11
    - Compiler bug with aligned members in virtuals + alloca() in VS2003 Hi there, I believe I've found an issue with a specific combination of object instantiations and the alloca() function. It appears that the compiler miscalculates the placement of ESI on the stack, so in a debug build, the __RTC_CheckEsp() stack checker function throws up the following warning: "Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention." I've attached the code below and it should be reproducible by creating a new win32 c++ project and just running and building it in debug. Thanks for your attention. If you can confirm my results, please let me know. I've tested it against the original VC++ 2003 and similar code causes the same issue with SP1. I'll update when I get to try it on VS2005. Rich ///////////////////////// #include <malloc.h> #include <windows.h> class ClassWithDestructor { public: ~ClassWithDestructor() {} // Destructor needed }; class AlignedMember { __declspec(align(32)) int a; // Needs an aligned member public: AlignedMember() {} // Constructor needed }; class Application { public: virtual bool Application::render() // Needs to be virtual { ClassWithDestructor classWithDestructor; int *myInt = (int *)alloca(sizeof(int)); AlignedMember alignedMember; return true; } bool callRender() { return render(); } // Needs a wrapper to the virtual virtual ~Application() {} }; int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int) { Application application; return application.callRender(); } Tag: os with vc Tag: 270340
  - 12
    - Virtual Memory growing seemingly independent of Private Bytes We have an application that receives network packets and writes them to files on disk. This application will run along nicely with about 85M of private bytes and 200M of virtual bytes in use. After about 6-12 hours of running, the virtual bytes will take off to over 1.7 G and bad allocs will start occurring. We have been examining this behavior from every which way and can't really explain it. The private bytes never grows appreciably. Any ideas what can cause this? The app does have several dynamically loaded dlls and we us the dll version of the runtime library to help consolidate memory allocations. The network communications use completion ports and the app is heavily multi-threaded. We are considering going down the road of using separate heaps with the hopes of trying to figure out what is going wild. Any ideas of what could be going on? joe Tag: os with vc Tag: 270338
  - 13
    - _bstr_t Whenever, I look at a _bstr_t in the VC++ 6.0 debugger, it only shows part of it and indicates that there is more by placing "{1}" at the end. Anyone know how to see all of a _bstr_t in the debugger? Tag: os with vc Tag: 270334
  - 14
    - VS 2005 re-compile whole project each time Hi. I have some win32 project where I have about 20 .cpp files. When I make change in one of them, VS re-compile each .cpp source each time. I've tried almost every project option but without result. Is there any known trodden way to check where I'm wrong? Thanks in advance. Tag: os with vc Tag: 270318
  - 15
    - MIDL link problem - upgrade to VC8 Hello, I am upgrading the VC++6.0 project to 2005. In the project I have 2 idl files. I get the next errors: LssSsc_s.obj : error LNK2005: "struct _MIDL_PROC_FORMAT_STRING const __MIDL_ProcFormatString" (?__MIDL_ProcFormatString@@3U_MIDL_PROC_FORMAT_STRING@@B) already defined in LssPsc_s.obj LssSsc_s.obj : error LNK2005: "struct _MIDL_TYPE_FORMAT_STRING const __MIDL_TypeFormatString" (?__MIDL_TypeFormatString@@3U_MIDL_TYPE_FORMAT_STRING@@B) already defined in LssPsc_s.obj 111.exe : fatal error LNK1169: one or more multiply defined symbols found When I look at .c generated files I see the declaration in 2 files: typedef struct _MIDL_TYPE_FORMAT_STRING { short Pad; unsigned char Format[ TYPE_FORMAT_STRING_SIZE ]; } MIDL_TYPE_FORMAT_STRING; typedef struct _MIDL_PROC_FORMAT_STRING { short Pad; unsigned char Format[ PROC_FORMAT_STRING_SIZE ]; } MIDL_PROC_FORMAT_STRING; Any idea how to avoid it? Why is the problem in VC2005? Thanks Tag: os with vc Tag: 270316
  - 16
    - _mbscpy_s confusion Hi All! I'm new to cpp and getting severely beat up by some pointer stuff. I have an unsigned char array buffer with some data including the length of a string followed by the chars of the string. This byte array is received from a client via socket - all that works fine. I am trying to call _mbscpy_s to get the string out of the buffer: BYTE buf[BUF_SIZE]; // 1024 // buf bytes look like this buf[0] = 0 next four are length of 'name' buf[0] = 9 buf[0] = 0 buf[0] = 0 buf[0] = 0 'name' starts here buf[5] = 112 'p' buf[6] = 97 'a' buf[7] = 114 'r' etc. Now, the code: unsigned char* name = new unsigned char [iNameLen]; // length is 9 errno_t err = _mbscpy_s( name, iNameLen, &buf[5] ); throws a 'Buffer too small' exception but errno_t err = _mbscpy_s( name, iNameLen, &buf[4] ); doesn't throw, although *name = 0, which is as expected. How do I get my multi-byte string out of the buffer? Please help me make the pain go away! Thank you!!! Kevin Montreal, QC Tag: os with vc Tag: 270315
  - 17
    - Pls--Need help with Hellow World! with MS Visual C++ 6.0 For some reason I cannot get my HelloWorld program to display "Hello World!" on the output window. My program compiles, links, and executes without errors. After executing this program a window appears with a white background and no text. I am running MS Visual C++ 6.0 Professional Edition. TIA Here's my program: // The Hello World #include<stdafx.h> #include<iostream.h> #include<conio.h> int main() { cout << "Hello World!" << endl; getch(); return 0; } --------------------- I tried // The Hello World #include<stdafx.h> #include<iostream.h> #include<conio.h> int main() { cout << "Hello World!" << endl; /*** getch(); ***/ return 0; } ---------------------- And I still get a blank window to appear when I execute the program. I would expect a window to quickly flash on the screen and go away, but the window remains until I close it. I created this with Win32 Console selected. Another question I have is why do I need stdafx.h? Tag: os with vc Tag: 270304
  - 18
    - about stderr May I use in Microsoft C++ the following statement or I will get an error? #include <cstdio> ...... std::fputs( msg.c_str(), std::stderr ); .... Vladimir Grigoriev Tag: os with vc Tag: 270289
  - 19
    - More than StringCchPrintf is broken Since some of the source code for Windows CE is public, I tried to see if I could find just where StringCchPrintf breaks programs. I haven't found it yet but I found the following gem. void WideToAnsi (const WCHAR *wcs, char *sz, DWORD cch) { #ifdef TARGET_BUILD DWORD i = 0; cch--; while (i < cch && wcs[i]) { sz[i] = (char) wcs[i]; i++; } sz[i] = 0; #endif } Even when the device's code page is 932 or a Chinese or Korean character set. Brillant. Tag: os with vc Tag: 270282
  - 20
    - Change cursor - Windows mobile 5.0 Hi folks, I am trying to change the default cursor to custom or a standard hand cursor on a windows mobile 5.0 application. I tried different things but I keep getting error 6 (invalid handle) when loading the cursor. 1. First I tried LoadCursor() with standard and custom cursors HCURSOR hCursor = LoadCursor(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDC_MYCURSOR)); 2. The wait cursor is the only one to work on my app. SetCursor(LoadCursor(NULL, IDC_WAIT)); The hand cursor does not work SetCursor(LoadCursor(NULL, IDC_HAND)); 3. Then I tried LoadImage() HANDLE hCursor = LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDC_CURSOR1), IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE); But the identifier "LR_DEFAULTSIZE" is not defined even if I include "Winuser.h". I read that the LR_MONOCHROME might help but once again this is not defined. Now the documentation talks about linking to "Cursor.lib" and "Mcursor.lib". I do not have those libs and I did not find them on the web either...? So is it really possible to do what I need? What did I miss? Thanks in advance, -- ST --------------------------- stopin@nospam.nospam Tag: os with vc Tag: 270281
  - 21
    - StringCchPrintf is broken StringCchPrintf is broken, verified with the debugger in Visual Studio 2005 on Windows XP Pro, target running on a Windows Mobile 5 Pocket PC. All machines, Windows versions, and Visual Studio 2005 are the same language version, Japanese. The Windows Mobile 5 Pocket PC SDK is US-English. char devnm[50]; // ANSI because gethostname doesn't handle Unicode char *mdlnm = "Pocket PC"; // ANSI for no reason at the moment gethostname(devnm, sizeof devnm); #ifdef _UNICODE StringCchPrintf(szTraceInfo, ARRAYSIZE(szTraceInfo), _T("device type \"%S\", hostname \"%S\""), mdlnm, devnm); #else StringCchPrintf(szTraceInfo, ARRAYSIZE(szTraceInfo), _T("device type \"%s\", hostname \"%s\""), mdlnm, devnm); #endif // breakpoint on the next line of code ... The Unicode version of StringCchPrintf was executed, as expected in Windows CE. mdlnm was a constant this time as shown: Pocket PC devnm was an ANSI string 15 bytes long including the NUL terminator: $B%=%U%H3+H/(BiPaq The result: device type "Pocket PC", hostname "" StringCchPrintf really can't handle conversion between ANSI and Unicode, so maybe that's why MSDN doesn't say it can. (Except that StringCchPrintf managed to handle one conversion, where a string only used a small subset of all the characters that exist in the default and current code page.) Tag: os with vc Tag: 270274
  - 22
    - Problems with boost::threads and C++/CLI using VS 2005 SP1 Beta If I link my /clr application to the boost::thread library when using the new SP1 I get the following error when running my application The application failed to initialize properly (0xc000007b). Click on OK to terminate the application. If I run it in the debugger it gives the same error and never breaks into something I can step through. This worked fine pre-SP1 so I'm guessing something's changed. I have made sure that I've recompiled the boost libraries afer SP1. I've posted to the boost newsgroup and they've said they're not doing anything 'CLI hostile' and they would expect it to work. Is this the proper place to report issues with the service pack? Here's a simple example which will fail when compiled with /clr. Note that including the boost::thread header automatically links with the library. #include <boost/thread/thread.hpp> int main( int argc, const char* * argv ) { return 1; } Any help would be appreciated. John Dunn Tag: os with vc Tag: 270267
  - 23
    - One spin control works, one doesn't!!! Hey All! I'm stumped! I have two dialogs, both dealing with Hours:Minutes. In the first dialog the spin control is defined in the .rc as: CTEXT "",ST_HOUR,15,11,18,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_HOUR,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS | WS_TABSTOP,33,11,10,10 CTEXT "",ST_MINUTE,43,11,18,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin2",SB_MINUTE,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS | WS_TABSTOP,61,11,10,10 LTEXT "AM",TX_AMPM,76,13,12,12,NOT WS_GROUP And the setup code is: // setup spin buttons SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_SETRANGE, 0, MAKELONG(23, 0)); SendDlgItemMessage(hWndDlg, SB_MINUTE, UDM_SETRANGE, 0, MAKELONG(59, 0)); SetDlgItemText(hWndDlg, ST_HOUR, "12"); SetDlgItemText(hWndDlg, TX_AMPM, szAm); SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_SETPOS, 0, MAKELONG((short) 0, 0)); And the reading code is: int nValue = (int)SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_GETPOS, 0, 0L); if (nValue >= 12) { SetDlgItemText(hWndDlg, TX_AMPM, szPm); wsprintf(szWorkBuf, "%02d", (nValue>12)?nValue-12:12); SetDlgItemText(hWndDlg, ST_HOUR, szWorkBuf); } Now, in the above the dialog is loaded, the spin control is initialized and the displayed value is 12:00am. When the user presses the down arrow for the HOUR the spin control is read and returns nValue == 23 which is CORRECT! I have another dialog which uses almost the exact same code which behaves VERY badly! Here is the control definition in the .rc file: CTEXT "",ST_START_HOUR,14,19,16,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_START_HOUR,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS,29,19,10,10 CTEXT "",ST_START_MIN,39,19,16,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_START_MIN,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS,55,19,10,10 LTEXT "am",ST_START_AMPM,66,20,12,9,NOT WS_GROUP Here is the code which initializes the spin control: // setup spin buttons SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_SETRANGE, 0, MAKELONG(23, 0)); SendDlgItemMessage(hWndDlg, SB_START_MIN, UDM_SETRANGE, 0, MAKELONG(59, 0)); SetDlgItemText(hWndDlg, ST_START_HOUR, "12"); SetDlgItemText(hWndDlg, ST_START_AMPM, szAm); SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_SETPOS, 0, MAKELONG((short) 0, 0)); Here is the code which reads the dialog control: int nValue = (int)SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_GETPOS, 0, 0L); if (nValue >= 12) { SetDlgItemText(hWndDlg, ST_START_AMPM, szPm); wsprintf(szWorkBuf, "%02d", (nValue>12)?nValue-12:12); } SetDlgItemText(hWndDlg, ST_START_HOUR, szWorkBuf); OK, now here's where the problem surfaces. First, when this control is displayed its starting value is set to ZERO (not 12). Second, and this is BIG, if the user clicks the down arrow on this control the nValue is set to 11 which is WRONG, it should be 23!!! The only other piece of information I can share is that the 2nd spin control is in a separate dialog which is called by the dialog containing the first spin control. I've looked at this until my eyes have crossed... help please! Phil =============================================== half frog half prince at oohay dot com =============================================== Tag: os with vc Tag: 270254
  - 24
    - transmitFile() function How can transmit memory-mapped files using transmitFiles() function?. Tag: os with vc Tag: 270249
  - 25
    - Command line cross-compile X86, X64 and IA64 Visual Studio 2005 Hi, I want to builds several librairies (lib and dll) by using the command line (cl.exe, link.exe, ...) with VS2005. I know the option /MACHINE:{X86, X64, IA64} for the linking but is there a similar option for the compiler? All librairies that I build are the same size witch is impossible. Here are the command line that I use : cl.exe @" /c /Wp64 /O2 /D _WIN64 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _CRT_NON_CONFORMING_SWPRINTFS /D NDEBUG /D _WINDOWS /D _MBCS /Z7 /Zc:wchar_t " and link.exe " /MACHINE:IA64 /implib:" kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /incremental:no libpath:"PATH" " So, I think the link go to the right target but the problem is cl.exe. How to specify to target machine ? /bin/amd64/cl.exe can execute /bin/ia64/cl.exe can't execute Regards Eric Tag: os with vc Tag: 270248

is it possible to write a simple os using vc++ 6? What is the start-point?

Re: os with vc by Mark

Mark
Thu Oct 26 13:48:58 CDT 2006

"kocha" <kocha@discussions.microsoft.com> wrote in message
news:DFAB05C2-F10C-4943-AD5C-3A9896EAE312@microsoft.com...
> is it possible to write a simple os using vc++ 6? What is the
> start-point?

__asm {

^^ start point

--
- Mark Randall
http://www.temporal-solutions.co.uk
http://www.awportals.com

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Re: os with vc by Brian

Brian
Thu Oct 26 14:53:58 CDT 2006

http://www.google.com/Top/Computers/Programming/Operating_Systems/

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Re: os with vc by Bruno

Bruno
Fri Oct 27 05:59:03 CDT 2006

> is it possible to write a simple os using vc++ 6? What is the
> start-point?

You could take a look at E.g. Minix, and see how tanenbaum has designed his
OS.
Note that the hardest part is not the OS itself, but getting it to boot.
That involves all sorts of black magic and blood of goats.
Your best chance there would be to adapt lilo or Grub to boot your OS.

Minix was built for educational purposes, so it should be a good help when
you start.

--

Kind regards,
Bruno van Dooren
bruno_nos_pam_van_dooren@hotmail.com
Remove only "_nos_pam"

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