Compiler warnings...

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  - 1
    - Basic Classes question hi, im using c++... if i have a project with a main cpp file and another secondery cpp and they both have header files but my problem is how can i connect them both to a new header file ive created that containes a class ive created and should be used by both main and secondery files... ive tried many options but all of them returned the following resault... " MainWnd.obj : error LNK2005: "class LFile PFile" (?PFile@@3VLFile@@A) already defined in ProtLab.obj " Tag: Compiler warnings... Tag: 255849
  - 2
    - _write Leaving Out Bytes I am using MS Visual C++ 7.1.3088 on Windows XP 5.1 I have two defined structures, struct1 and struct2 and would like to write them at the beginning of a file. I use the following approach. #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> #include <windows.h> #include <io.h> int func(char *csFileName, struct1 s1Struct, struct2 s2Struct) { int iOutputFile; int iBytes2Write, iBytesWritten; if ((iOutputFile = _open(csFileName, _O_WRONLY | _O_BINARY | _O_APPEND | _O_CREAT, _S_IWRITE)) == -1) /* Error handling*/ iBytes2Write = sizeof(struct1); // Size is 40 bytes if ((iBytesWritten = _write(iOutputFile, (void *)&s1Struct, iBytes2Write)) < iBytes2Write) { _close(iOutputFile); // Error handling } iBytes2Write = sizeof(struct2); // Size is 104 bytes if ((iBytesWritten = _write(iOutputFile, (void *)&s2Struct, iBytes2Write)) < iBytes2Write) { _close(iOutputFile); // Error handling } _close(iOutputFile); } For some reason, the first 8 bytes of the second structure are left out. I can tell this by doing an octal dump on Unix. It is quite clear. The last byte of s1Struct is immediately followed by the ninth byte of s2Struct. I could just add an extra 8 bytes before the second structure but would prefer a tidier solution. Any assistance would be greatly appreciated. Many thanks in advance, Peter. Tag: Compiler warnings... Tag: 255835
  - 3
    - For loop changes in Point structure? Hello, I am trying my first Windows program without copying Petzold's examples, however using what I have learnt, and I seem to have an unexpected result. Basically, I have successfully managed to put a square background with text at the far top right of my client area. Further more you can press the function keys F1 to change the OPAQUE option of the square, F2 for the Brush color of the square and F3 to select one of three possible text colors. How ever when I introduce a simple for loop at the end of my WM_PAINT messge rountine, I get my square being drawn at the far left. I don't know why! And if I remove the for loop it works fine. The for loop just clears an array and has nothing to do with the coordinates of my rectangle function, and yet it seems that the for loop changes these coordinates. I feel guilty having to show all this.... but I am stumped! Please, look for this code: for (j = 0; j < 3; j++) { iTemp[j] = 0; } *IF I REMOVE IT, EVERYTHING WORKS, IF I LEAVE IT IN, IT CHANGES THE POINT COODINATES OF MY RECTANGLE!!!!???!!!??? Here is the code! -------------------------------------------------Header file "HTM.h" //Words that are available struct { int iWLenght ; TCHAR * szWord ; } Words [] = { 5, TEXT ("SMILE"), 7, TEXT ("WINDOWS"), 7, TEXT ("IMPROVE"), 7, TEXT ("FASHION"), 6, TEXT ("COMPEL"), 8, TEXT ("MEDICINE"), } ; ---------------------------------------------------C program #include <windows.h> #include "HTM.h" LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); const int NUMLINES = (sizeof Words) / (sizeof Words[0]); //My functions void DrawOptions(HDC,HWND,BOOL,BOOL,int,POINT[]); int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInnstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT ("HangTheMan"); HWND hwnd; MSG msg; WNDCLASS wndclass; wndclass.style = CS_HREDRAW |CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION); wndclass.hCursor = LoadCursor (NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("xxx"),szAppName, MB_ICONERROR); return 0; } hwnd = CreateWindow (szAppName, TEXT ("HANG THE MAN ! "), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); ShowWindow(hwnd, iCmdShow); UpdateWindow (hwnd); while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return (int) msg.wParam; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { //TITLES VARIABLES static TCHAR szTop[] = TEXT ("WORDS LETTERS"); static TCHAR szUnd[] = TEXT ("_______ _________"); static TCHAR szF1[] = TEXT ("F1: OPAQUE"); static TCHAR szF2[] = TEXT ("F1: BACKGROUND BRUSH"); static TCHAR szF3[] = TEXT ("F1: TEXT COLOR"); static int iTemp[2]; //VARIABLE static int cxChar, cxCaps, cyChar, cxClient, cyClient; static int i,j,TopMargin = 32; static BOOL b_Opaque = TRUE; static BOOL b_GrayBrush = TRUE; static int ColorTYPE = 0; static POINT pts[1]; //WINDOW STRUCTURES HDC hdc; PAINTSTRUCT ps; TCHAR szBuffer[10]; TEXTMETRIC tm; switch (message) { case WM_CREATE: hdc = GetDC (hwnd); GetTextMetrics (hdc, &tm); cxChar = tm.tmAveCharWidth; cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2; cyChar = tm.tmHeight + tm.tmExternalLeading; ReleaseDC (hwnd, hdc); return 0; case WM_SIZE: cxClient = LOWORD(lParam); cyClient = HIWORD(lParam); //MESSAGE BOARD BACKGROUND RECTANGLE CO-ORDINATES pts[0].x = (cxClient - (cxChar * 26)); pts[0].y = 23; pts[1].x = cxClient; pts[1].y = 140; return 0; case WM_KEYDOWN: switch (wParam) { case VK_F1: //Set opposite value of what b_Opaque is if(b_Opaque == TRUE) {b_Opaque = FALSE;} else {b_Opaque = TRUE;} break; case VK_F2: if(b_GrayBrush == TRUE) {b_GrayBrush = FALSE;} else {b_GrayBrush = TRUE;} break; case VK_F3: //Go through the three colors. Change color every time F3 is pressed. if (ColorTYPE < 2 ) {ColorTYPE++;} else {ColorTYPE = 0;} } InvalidateRect(hwnd,NULL,TRUE); return 0; case WM_PAINT: hdc = BeginPaint (hwnd, &ps); SetBkMode(hdc,TRANSPARENT); TextOut(hdc,(cxClient - (cxChar * 25)),0,szTop,lstrlen(szTop)); TextOut(hdc,(cxClient - (cxChar * 25)),0,szUnd,lstrlen(szUnd)); //MESSAGE BOARD APPEARANCE OPTIONS DrawOptions(hdc,hwnd,b_Opaque,b_GrayBrush,ColorTYPE,pts); for (i = 0; i < NUMLINES; i++) { //DISPLAY AT CLIENT WIDTH MINUS 25 TIMES THE WIDTH OF A CHAR TextOut (hdc,(cxClient - (cxChar * 25)),(cyChar * i)+ TopMargin, Words[i].szWord,lstrlen(Words[i].szWord)); SetTextAlign (hdc, TA_RIGHT | TA_TOP); //DISPLAY AT cxClient - 15 TextOut (hdc,cxClient -15,(cyChar * i)+ TopMargin,szBuffer, wsprintf(szBuffer,TEXT("%2d"),Words[i].iWLenght)); SetTextAlign (hdc, TA_LEFT | TA_TOP); } for (j = 0; j < 3; j++) { iTemp[j] = 0; } EndPaint (hwnd, &ps); return 0; case WM_DESTROY: PostQuitMessage (0); return 0; } return DefWindowProc (hwnd, message, wParam, lParam); } //DRAW OPTIONS FOR THE RECTANGLE void DrawOptions(HDC hdc,HWND hwnd,BOOL b_OPAQUE,BOOL b_GRAYBRUSH, int i_ColorTYPE, POINT pts[]) { //Windows objects HBRUSH hBrush; //CHOICE OF OPAQUE OR TRANSPARENT if (b_OPAQUE == TRUE) {SetBkMode(hdc,OPAQUE); SetBkColor(hdc,0);} else {SetBkMode(hdc,TRANSPARENT); SetBkColor(hdc,22000);} //CHOICE OF COLOR TYPE if (i_ColorTYPE == 0) {SetTextColor(hdc,65535);} else if (i_ColorTYPE == 1) {SetTextColor(hdc,16777215);} else if (i_ColorTYPE == 2) {SetTextColor(hdc,9999);} //SELECT BRUSH COLOR if (b_GRAYBRUSH == TRUE) {hBrush = (HBRUSH) GetStockObject(GRAY_BRUSH);} else {hBrush = (HBRUSH) GetStockObject(WHITE_BRUSH);} //SELECT THE BRUSH INTO THE DEVICE CONTEXT SelectObject(hdc,hBrush); //DISPLAY RECTANGLE Rectangle(hdc,pts[0].x,pts[0].y,pts[1].x,pts[1].y); } I appreciate all help regarding this post! Thanks Ross Tag: Compiler warnings... Tag: 255829
  - 4
    - WSAStartup() in _tmain() for winsock I am porting some functions to VC++ .net, it was written to be windows compatible but in the original program it did its WSAS calls in main() but when i do them in _tmain they don't seem to be workiing. I am still getting the following type errors for the close() and write() functions access.c access.c(119) : error C2692: 'close' : fully prototyped functions required in C compiler with the '/clr' option access.c(119) : error C2197: 'close' : too many arguments for call through pointer-to-function access.c(130) : error C2197: 'close' : too many arguments for call through pointer-to-function access.c(236) : error C2692: 'write' : fully prototyped functions required in C compiler with the '/clr' option access.c(236) : error C2197: 'write' : too many arguments for call through pointer-to-function access.c(236) : error C2197: 'write' : too many arguments for call through pointer-to-function access.c(236) : error C2197: 'write' : too many arguments for call through pointer-to-function any thoughts? Tag: Compiler warnings... Tag: 255828
  - 5
    - C4311 and reinterpret_cast I'm in the unfortunate situation of needing to interface with a library that I can't change. To document the non-portable typecasts, I have been using cast operators. However, I'm unable to silence C4311 with reinterpret_cast. No other cast operator is appropriate. Is there a two-step mechanism to deal with C4311 without offending VC++ 7.1? CMsgReceiverQueueIterator itr = m_qParentReceiverList.begin (); while ( itr != m_qParentReceiverList.end () ) { CNkvMessageReceiver * thisRec = *itr; // warning C4311: 'reinterpret_cast' : pointer truncation from 'std::allocator<_Ty>::value_type' to 'ULONG' NkvMessage (reinterpret_cast <ULONG> (*itr)); itr++; } Thanks in advance, - Ashok Thirumurthi Tag: Compiler warnings... Tag: 255825
  - 6
    - function to terminate worker thread in VC++ hi Everybody, I am using postquitmessage(GetIndexThread(<thraedname>, NULL)) function to terminate the thread just below the calling function. UINT CHRS_MoleDlg::Thread_Camera(LPVOID param) { CHRS_MoleDlg *self=(CHRS_MoleDlg *)param; for(;;) self->OnCameraThread(); PostQuitMessage(GetExitCodeThread(Thread_Camera , NULL)); return 0; } but still i am facing problem , actually i dont know exactly where i should write postquitmessage() what function i should used to terminate thraed. please tell me. Tag: Compiler warnings... Tag: 255820
  - 7
    - how to terminate thread in vc++ hi Everybody, I am using postquitmessage(GetIndexThread(<thraedname>, NULL)) function to terminate the thread just below the calling function. UINT CHRS_MoleDlg::Thread_Camera(LPVOID param) { CHRS_MoleDlg *self=(CHRS_MoleDlg *)param; for(;;) self->OnCameraThread(); PostQuitMessage(GetExitCodeThread(Thread_Camera , NULL)); return 0; } but still i am facing problem , actually i dont know exactly where i should write postquitmessage() what function i should used to terminate thraed. please tell me. Tag: Compiler warnings... Tag: 255819
  - 8
    - Where to start on an error? Hi, I posted this question in comp.lang.c++ and someone said I might have better luck in this group. I am trying to build a project in VC++ Express but am getting the following errors: arena.obj : error LNK2019: unresolved external symbol ___glutInitWithExit@12 referenced in function _glutInit_ATEXIT_HACK@8 arena.obj : error LNK2019: unresolved external symbol ___glutCreateWindowWithExit@8 referenced in function _glutCreateWindow_ATEXIT_HACK@4 ../wbin/Arena.exe : fatal error LNK1120: 2 unresolved externals In general, how should one start on a seemingly obscure errors like this? (obscure to me at least) Note I am fairly new to c++ and VC -Jimmy Tag: Compiler warnings... Tag: 255809
  - 9
    - Getting file and line when using std::out_of_range Hi I have been using #define _SECURE_SCL 1 #define _SECURE_SCL_THROWS 1 combined with: catch(std::out_of_range) To find errors in my code when using vectors. It works fine but is there a way to get the file and line that throws? Since having this information will save me a lot of time. Thanks Torben Laursen Tag: Compiler warnings... Tag: 255806
  - 10
    - NTFS streams and document summary info. Can anyone point me to some information about NTFS streams and in particular what the format is for the information (author keywords etc) which you can add by right clicking on a document file in Windows Explorer, and using "Properties"? Coming into the 21st century, I thought I'd give my program some knowledge of this. I was pointed to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/ntfs5.asp which tells how to enumerate the streams associated with a file using the ::BackupRead() API. I did this with a document file to which I had added some information. The results are interesing. The streams are (1) "" (which I guess is the main stream) (2) ":DocumentSummaryInformation:$DATA" (3) ":SummaryInformation:$DATA" (4) ":{4c8cc155-6c1e-11d1-8e41-00c04fb9386d}:$DATA" Numbers 2 and 3 look promising except that the 2nd character in each is Unicode character 5 - which is a control character which I didn't expect to find there. (Lord knows what he last one is - I looked - just in case - for the ID in my registry, but it doesn't seem to be there.) Some particular questions arise: Are the stream names the same in all language versions of Windows? What is the character 5 doing there? What is the format of the information stored by the shell in these streams? There must surely be some information on this somewhere? Dave -- David Webber Author MOZART the music processor for Windows - http://www.mozart.co.uk For discussion/support see http://www.mozart.co.uk/mzusers/mailinglist.htm Tag: Compiler warnings... Tag: 255800
  - 11
    - LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; Hi What is this line stand for? LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; ^^^^^^^^^ What is a LRESULT ? Best regards, Boki. Tag: Compiler warnings... Tag: 255787
  - 12
    - File Copy Problem!!! Hi, I am creating a shell namespace extension to show FTP files. I implemented cut / copy and paste using CFSTR_FILECONTENTS and CFSTR_FILEDESCRIPTOR. I implemented IDataObject and IStream for this. After copying, when I choose to paste the files, I am getting all the files, But the problem is that, the directory structure is not retained. If I am copying a folder say "Test", which contains 2 files 1. a.txt 2. b.txt When I choose paste, I am getting 2 files ( a.txt and b.txt ) and a folder ( Test ) in the same place. In fact it should have been folder "Test" and the two files inside "Test". But that is not happening. I believe I am missing something here... Could somebody please help me in resolving this. Thanks and Kind Regards Jugs Tag: Compiler warnings... Tag: 255785
  - 13
    - function with pointer Please help! I have a class Book with private data char * ptrTitle which pointing to an memory storing the book title. I set the Title using the following function void Book::setTitle(string inTitle) { ptrBookTitle = new char[strlen(inTitle.c_str())+1]; strcpy(ptrBookTitle, inTitle.c_str()); } I don't know how to write the function that returning the book title. Please help! Tag: Compiler warnings... Tag: 255783
  - 14
    - c++ certification? Does anyone know of any certificates in C++ programming that are useful to have in the industry? (In terms of getting a job or freelancing etc) -- Best regards Mark Tag: Compiler warnings... Tag: 255777
  - 15
    - casting... at runtime? This Seems to be pattern I run into a Lot an I don't know how to fix it without a lot of "else if" statements. I have several Classes, that look something like this Class CBase : public CObject{ virtual void CopyFrom(CBase* other); } Class CDerived1 : public CBase { virtual void CopyFrom(CDerived1* other); } Class CDerived2 : public CBase { virtual void CopyFrom(CDerived2* other); } Copy From Makes a Copy of All the data in the "other" Object to this Object. Class CHelper { public: void SetObj(CBase* newVal); private: CBase* m_obj; } /////////////////////////////// // newVal could be anything // CBase, CDerived1 , CDerived2....etc void CHelper::SetObj(CBase* newVal) { CRuntimeClass* newClass = newVal->GetRuntimeClass(); CBase* newObj = (CBase*)dragClass->CreateObject(); newObj->CopyFrom(newObj); } //this does not work as one might expect //because the last line Always calls //CBase::CopyFrom(CBase* other); //regardless of the runtime class of "newVal". I can alway change the last line to something like this this if (newVal->IsKindOf(RUNTIME_CLASS(CDerived1))) newObj->CopyFrom((CDerived1*) newObj); if (newVal->IsKindOf(RUNTIME_CLASS(CDerived2))) newObj->CopyFrom((CDerived2*) newObj); if (newVal->IsKindOf(RUNTIME_CLASS(CBase))) newObj->CopyFrom((CBase*) newObj); Or I could Over ride CopyFrom(CBase* other); for all the Derived Classes. but what I REALY would like to do is cast "newVal" to its runtime class at runtime, without knowing what it will be at compile time. So how do I case a class to a class at runtime, when I don't know the class at compile time? is this possible? if not is what is the logic behind it? why is what I want to do a bad idea? thanks how Tag: Compiler warnings... Tag: 255773
  - 16
    - cannot convert from 'type' to 'type&' What is wrong with this code: class b { }; class d : public b { }; int main ( int num_args , char* args[] ) { b B; d D; b& br = B; d& dr = D; b& o = num_args == 1 ? br : dr; //error C2440: 'initializing' : cannot convert from 'b' to 'b &' } Tag: Compiler warnings... Tag: 255771
  - 17
    - VC8: streams and locales Hi, Take this code: #include <sstream> #include <cassert> #include <locale> int main() { std::istringstream iss; iss.str("{1,}"); char ch; int n; iss >> ch; iss >> n; // works on vc7.1, fail on vc8 assert(!iss.fail()); iss >> ch; } apparently the locale being used by istringstream on vc8 is using a grouping configuration of 3. On vc7.1 the configuration is 0. I solved this by doing: class my_numpunct : public std::numpunct_byname<char> { public: my_numpunct (const char *name) : std::numpunct_byname<char>(name) {} protected: virtual std::string do_grouping() const { return ""; } }; And then iss.imbue(std::locale(std::locale(""), new my_numpunct(""))); Is this the correct solution? regards, Josue Tag: Compiler warnings... Tag: 255769
  - 18
    - Are native modules subject to LTCG optimizations? The VC++ 2003 linker can perform cross-module optimizations if it has been invoked with the /LTCG option. Do such optimizations apply to native modules (.obj and .lib files compiled without /LTCG) as well? Tag: Compiler warnings... Tag: 255768
  - 19
    - ActiveX controls in MFC DLLs Dialog (solution worth mensioning) Hi NewBies, I had a crash in winocc.cpp line 301 when trying to add DLL to a MFC ATL dialog and call from a CView App. After 100 trials my friend poped me a suggestion worth a ton of Gold ! To prevent crash in DLL when hosting an activex contrl inside a MFC DLL dialog Ensure the following In InitInstance of the DLL App class Have AfxEnableControlContainer() as the first line; In your calling applications view invoke the DLL as CoInitializeEx(NULL, COINIT_MULTITHREADED); I had it working but any ideas of why it is working ? Experts please help ! Thanks Deepak Tag: Compiler warnings... Tag: 255759
  - 20
    - ActiveX controls in MFC DLLs Dialog (solution worth mensioning) Hi NewBies, I had a crash in winocc.cpp line 301 when trying to add DLL to a MFC ATL dialog and call from a CView App. After 100 trials my friend poped me a suggestion worth a ton of Gold ! To prevent crash in DLL when hosting an activex contrl inside a MFC DLL dialog Ensure the following In InitInstance of the DLL App class Have AfxEnableControlContainer() as the first line; In your calling applications view invoke the DLL as CoInitializeEx(NULL, COINIT_MULTITHREADED); I had it working but any ideas of why it is working ? Experts please help ! Thanks Deepak Tag: Compiler warnings... Tag: 255758
  - 21
    - auto_ptr struct A { int a; int b; int c; }; Now I define an auto_ptr to point to a new area of memory... auto_ptr<A> a = new char[20]; Now when I do... delete a; Does it delete 12 bytes (the size of A) or 20 bytes (the size allocated)? -- Best regards Mark Tag: Compiler warnings... Tag: 255757
  - 22
    - winsock2.h and inclusion order I get a weird problem when I include winsock2.h before my own util.h, which defines some general (templated) utility functions in it's own namespace. The compiler (embedded visual C++) gives me a few syntax errors on my util.h file when I include winsock2.h first. However, when I include them in the other order (so first util.h, then winsock.h), everything is fine. I am most puzzled. Is there some issue with winsock2.h? Actually, it behaves the same way with winsock.h. I can hardly believe there's a quirk in a header as often used as winsock, but the error can't really be in my own code, since it's really simple, clear code, which works fine in other circumstances. Any ideas? regards Mark NB: if this is not the correct newsgroup for this question, feel free to boot me to the correct one. Tag: Compiler warnings... Tag: 255756
  - 23
    - for(;;) scope Hi everyone! Revising some code I've found this: for(int i=0; i<m_aArray.GetSize(); i++) { ... if(bCondition) break; } if( i==m_aArray.GetSize()) { // The condition was not satisfied so do whatever ... } That caused an ASSERT(HowCanItBe) into my brain. If "i" is declared into the "for", how is possible to use it later? The code compile right, so Was I wrong thinking that "i" _is_declared_ into the "for"? Then, talking with the partners at work someone pointed out that in VS you can do it, but in C++Builder it wouldn't compile. The question is What is the standard? And how are declared that kinds of variables? Thank you in advance. Regards. Tag: Compiler warnings... Tag: 255750
  - 24
    - how to make my ocx like flash movie? Dear all. first.. i'm poor for english. --;; I'm write VC++ 6.0 activex control that contains shockwave flash control. I can catch fs command from flash control in my ocx(1), but how can I pass it to web page? (2) (1) (2) flash movie -> flash control -> my ocx -> web page I've thought it would be able by firing event from my ocx to web page which named 'fscommand', but it does not work. What shall I do? Tag: Compiler warnings... Tag: 255746
  - 25
    - Operator Overloading I know that you can overload objects, but can the standard data types (integers, short, long, floats, etc.) have their = operator overloaded? I am developing a client server data application in C++ and I don't want to poll to see if the data has changed. I was thinking that overlaoding the = operator would indicate when there has been a change. Ofcourse I could make my own classes, but I have tens of thousands of lines of code that use the standard data types. Bascially, I just want to know what data has been changed and update it to the server without changing my exisitng code if possible. Is it possible to have an event triggered when a variable is changed? Overloading the = operator would be the same idea. Just wondering if there is something in MFC or the C++ language that would tell me when the value of a variable changes. The catch is that it has to be efficent too since my app has 750,000 variables. Are there any low level hooks into the OS that would help? I know its asking a lot, but does anyone have any ideas? Thanks for the help. Tag: Compiler warnings... Tag: 255745
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  - 1
    - Static library problem Hi, I have a problem with static libraries in Visual Studio 2003. My problem is the following: I have project 'BaseFramework' which is a static library(.lib) project, this project uses some C functions from a vendor. I also have a project B which is an application(.exe) project, this project includes the a.lib file. The 'BaseFramework' project builds just fine, but my problem is that when I try to build project B I get a lot LNK2019 errors saing that the linker cannot resolve the C functions that the 'BaseFramework' project is using, like this: BaseFramework.lib(InetAddress.obj) : error LNK2019: unresolved external symbol _htonl@4 referenced in function "public: __thiscall BaseFramework::Wrapper::Net::InetAddress::InetAddress(unsigned short)" (??0InetAddress@Net@Wrapper@BaseFramework@@QAE@G@Z) Does anybody have clue as to what I should do? /Regards Rasmus Tag: Compiler warnings... Tag: 255741
  - 2
    - using PRINTDLGEX API call to select a printer I'm new to API calls & using Visual C++, I have tried using this code (see below) from the MSDN website, but get compile errors right at the first line: : error C2065: 'LPPRINTDLGEX' : undeclared identifier : error C2146: syntax error : missing ';' before identifier 'pPDX' : error C2065: 'pPDX' : undeclared identifier we are using VFP 6.0 and using the older PrintDLG API call but are getting an intermittent problem (which is happening more & more as more of our users are using Window XP) where selecting a printer doesn't work. With Win9X we just used to run in a loop in VFP to get the user to select the printer again and it would normally be OK. I'm trying to use 'PPRINTDLGEX' instead to see if this solves the problem. Is this the best group to post this question even?! Please help!!! Grant. HRESULT DisplayPrintPropertySheet( HWND hWnd // Window that owns the property sheet ) { HRESULT hResult; LPPRINTDLGEX pPDX = NULL; LPPRINTPAGERANGE pPageRanges = NULL; // Allocate the PRINTDLGEX structure. pPDX = (LPPRINTDLGEX)GlobalAlloc(GPTR, sizeof(PRINTDLGEX)); if (!pPDX) return E_OUTOFMEMORY; // Allocate an array of PRINTPAGERANGE structures. pPageRanges = (LPPRINTPAGERANGE) GlobalAlloc(GPTR, 10 * sizeof(PRINTPAGERANGE)); if (!pPageRanges) return E_OUTOFMEMORY; // Initialize the PRINTDLGEX structure. pPDX->lStructSize = sizeof(PRINTDLGEX); pPDX->hwndOwner = hWnd; pPDX->hDevMode = NULL; pPDX->hDevNames = NULL; pPDX->hDC = NULL; pPDX->Flags = PD_RETURNDC | PD_COLLATE; pPDX->Flags2 = 0; pPDX->ExclusionFlags = 0; pPDX->nPageRanges = 0; pPDX->nMaxPageRanges = 10; pPDX->lpPageRanges = pPageRanges; pPDX->nMinPage = 1; pPDX->nMaxPage = 1000; pPDX->nCopies = 1; pPDX->hInstance = 0; pPDX->lpPrintTemplateName = NULL; pPDX->lpCallback = NULL; pPDX->nPropertyPages = 0; pPDX->lphPropertyPages = NULL; pPDX->nStartPage = START_PAGE_GENERAL; pPDX->dwResultAction = 0; // Invoke the Print property sheet. hResult = PrintDlgEx(pPDX); if ( (hResult == S_OK) && pPDX->dwResultAction == PD_RESULT_PRINT) { // User clicked the Print button, so // use the DC and other information returned in the // PRINTDLGEX structure to print the document } if (pPDX->hDC != NULL) DeleteDC(pPDX->hDC); if (pPDX->hDevMode != NULL) GlobalFree(pPDX->hDevMode); if (pPDX->hDevNames != NULL) GlobalFree(pPDX->hDevNames); return hResult; } Tag: Compiler warnings... Tag: 255737
  - 3
    - Errors reported in VS 2005 I'm trying to move an app from VS6 to VS2005 and am getting some errors in message map: 3>.\MyApp.cpp(720) : error C2440: 'static_cast' : cannot convert from 'void (__thiscall CMyApp::* )(BOOL,HTASK)' to 'void (__thiscall CWnd::* )(BOOL,DWORD)' 3> Cast from base to derived requires dynamic_cast or static_cast on this line: ON_WM_ACTIVATEAPP() and: 3>.\MyApp.cpp(934) : error C2440: 'static_cast' : cannot convert from 'void (__thiscall CMyApp::* )(UINT)' to 'BOOL (__thiscall CCmdTarget::* )(UINT,NMHDR *,LRESULT *)' 3> None of the functions with this name in scope match the target type on this line: ON_NOTIFY_EX(TBN_DROPDOWN, ID_DISPLAY_SOMETHING, OnDisplayButtonMenu) What is the solution to this? Thanks, Drew Tag: Compiler warnings... Tag: 255733
  - 4
    - LoadLibrary("rsaenh.dll") succeeds in Debugger, fails otherwise (Win I call LoadLibrary("rsaenh.dll") from a huge MFC MDI application (which is done implicitly by CryptAcquireContext(), my actual target API call :)). On Windows 2003 Server it fails, GetLastError() yields 0x000003E6 == 998 == ERROR_NOACCESS ("Invalid access to memory location") which probably means an access violation during dll startup. But if I connect a remote debugger (msvcmon -anyuser -tcpip) just before the LoadLibrary() call, it succeeds. Also on WinXP and Win2000 Server the call succeeds (even without debugger). Calling LoadLibraryEx() with DONT_RESOLVE_DLL_REFERENCES succeeds also on Win2003 Server, but a subsequent CryptAcquireContext() fails, supposedly because the library is not fully loaded. I obtained a hot fix from Microsoft support which seems to fit my problem (see http://support.microsoft.com/default.aspx?scid=kb;en-us;899750&sd=rss&spid=3198), but unfortunately it didn't help. Anybody knows what's going on here? Thx & regards, Stephan Tag: Compiler warnings... Tag: 255732
  - 5
    - Should I use stsic class for DBAccess ? Hi I'm creating a small IS and I'm wondering if is a good idea to create one static class which will hold methods that will access the database. So I'd have only one class in the memory used for all db access. I think it is a good solution but .. maybe not. What do you think . ?? I have a class public static class DB Access { public static void InsertUse(string username) { ..... } .... } Tag: Compiler warnings... Tag: 255728
  - 6
    - catching messages for control in dialog I am creating a dialog without MFC and have run into yet another problem. When I make my call to DialogBoxParam() to create and show the dialog, I supply it with a function that will handle the messages from the dialog. This has been working fine and things are coming along, until... I wanted to catch mouse messages for my list view that is in the dialog. If I click anywhere else in the dialog, I can catch the button down message, but if I click in the list view area, the message is not sent to the function. Where is it sent? I can only supply one DLGPROC so I'm not sure what to do at this point. Anyone have any ideas? Thanks, Steve Tag: Compiler warnings... Tag: 255723
  - 7
    - explicit member template function specialization Hi, I have a problem with a template function inside a class (no template). The template parameter of the class is a policy class. But the explicit specialization of the template function does not work. Visual C++ 7.1 compiler said that the function cannot be explicitly specialized. But the same code compiles with the Comeau online compiler successfully. Here's a simplyfied version of the code (with same effect Comeau -> ok, VC++ 7.1 -> error): class Policy1 { public: typedef int type; }; class Policy2 { public: typedef long type; }; class ClassX { public: template<typename PolicyT> bool func(typename PolicyT::type arg); }; template<> bool ClassX::func<Policy1>(Policy1::type arg) { /* do something */ return true; } template<> bool ClassX::func<Policy2>(Policy2::type arg) { /* do something */ return true; } int main() { ClassX x; x.func<Policy1>(12); } Can anyone tell me, why this does not work (with VC++7.1)? Thx in advance, Georg Tag: Compiler warnings... Tag: 255719
  - 8
    - add file explorer to form Hi I am trying to add a panel to my windows form, and in it have basically a windows explorer control, which will allow users to navigate to a file that they want to use for input. I am able to add an openFileDialog but I cannot find how to make the explorer a permanent part of the form. thanks Tag: Compiler warnings... Tag: 255713
  - 9
    - Question abt VTable?? Hi, Where VTable stores? VTable creating in the run time means, before constructor or after constructor??? Thanks in advance. Regards, -- DKDS.Naidu. Tag: Compiler warnings... Tag: 255703
  - 10
    - to load a user's profile without logging in Hi everyone, Could anyone help me with the problem while unistallation. I want to delete entries from HKCU(HKUsers) corresponding to each and every user's account present on my local computer. Right now i am not able to load the ussers profile as i am using LoadUserProfile. The problem which i feel is that this function requires the token to a loggedon user(using LogonUser) , but i just want to load the profile without asking for the password. So is there any method of 1 ) Getting the user's account token without really asking for his password 2 ) Loading the users profile by any mechanism to make some changes to it without asking the user for the password. help on the above topic will be really appreciated. Thanks, Neo. Tag: Compiler warnings... Tag: 255698
  - 11
    - Property sheet behaviour OnApply In a tabbed dialogue, I make changes on various PropertySheets and press Apply. The standard recommendation at this stage seems to be to send the PropertySheet a PSM_CANCELTOCLOSE message, which (despite its name) disables the cancel button and turns the OK button into Close. This seems crazy. For if I now make any more changes in the PropertySheets, there is no going back. The "Close" button accepts them and the "Cancel" button is no longer available. A far more sensible behaviour (which is sort of suggested by the name of the message) would be to change the "Cancel" button into "Close" and leave the "OK" alone. Question: *is* this more sensible or am I missing something. Of course I can implement this behaviour with SetWindowText() on the Cancel button, but as there is no message to do it automatically, I am in danger of getting the English text "Close" on the button no matter what the language of the user. I can avoid this (I reckon) by the slightly devious method in the PropertySheet: CString sOk; CString sClose; CWnd *pWndOk = GetDlgItem( IDOK ); CWnd *pWndCancel = GetDlgItem( IDCANCEL ); if( pWndOk && pWndCancel ) { pWndOk->GetWindowText( sOk ); // Get "OK" text SendMessage(PSM_CANCELTOCLOSE); // "Ok" -> "Close" pWndOk->GetWindowText( sClose ); // Get "Close" text. pWndCancel->SetWindowText( sClose ); // "Cancel" -> "Close" pWndOk->SetWindowText( sOk ); // Reset "Ok" -> "Ok" pWndCancel->EnableWindow(TRUE); // Don't disable cancel. } but doing so makes me feel a little unclean, as I am sneakily bypassing what Mr Gates tells me to do. Someone please tell me it's ok! Dave -- David Webber Author MOZART the music processor for Windows - http://www.mozart.co.uk For discussion/support see http://www.mozart.co.uk/mzusers/mailinglist.htm Tag: Compiler warnings... Tag: 255697
  - 12
    - malloc() & page boundaries -- Difference between VC6 and VC7 CRT? I was wondering if anyone knew of any changes in the CRT that would cause malloc behavior to change between code built with VC6/VC7? We discovered a segfault bug in production code built with VC6 that was not crashing frequently at all. We fixed the bug, but in the meantime, our builds were in the process of being switched to VC7. In the VC7 built code, the same crash occurs much more frequently. This alarmed us, so we are investigating why VC7 behavior would differ so much from VC6. The nature of the bug is such that many small buffers (~16 bytes) are being malloc'd but the bug causes the code to read past the end of the buffer by 8 bytes. Straightforward, and this crashes whenever the address to the 17th byte lives on the next memory page which happens to not be allocated. The issue is in VC6 built code, this bug rarely occurs, almost as if the memory allocation never allocates that close to an invalid page, or never completely fills up an entire page. When the code is built in VC7, the crash occurs very, very frequently, as if the 16 bytes are being allocated at the end of the page prior to an invalid one. My question is if anything regarding malloc or the heap changed between VC6/VC7 that could be behind this. Do any of the compiler optimization flags affect malloc's ability to alloc up to the last available byte in a page? We have discovered the source of the bug in remote code and have fixed it, but we are questioning if it is safe to move to VC7 so quickly. Tag: Compiler warnings... Tag: 255690
  - 13
    - Implementing Log In C++, what is the correct syntax to implement the expression of "10 log e"? Tag: Compiler warnings... Tag: 255687
  - 14
    - LINK flag equivalent to -Bsymbolic I have a "C" shared library that statically links openssl and a "C" application that uses it also statically links openssl. I want to keep the two instances separate. On solaris and linux the -Bsymbolic flag to the linker for the shared library serves this purpose. Could someone let me know what the equivalent linker flag in for microsoft LINK linker. Tag: Compiler warnings... Tag: 255686
  - 15
    - The Qsort I have the following: struct Books { string bookname; int bookid; }; ... Books Library[500]; Library is then filled by user, and ofcourse in not done in alphabetic order. So, what I want to do after inserting values into Library is sort it alphabetically by Library.bookname. How can I use the Visual C++ qsort built in to accomplish that. I have read the help file in visual for qsort but to tell you the truth I couldnt make much of it. I know that before calling the qsort, I have to first write a compare function. But really, more than that I dont know. Please Help Thanks in Advance Tag: Compiler warnings... Tag: 255681
  - 16
    - inserting item into list view I have this code: <code> HWND hList = GetDlgItem(hDlg, IDC_LIST_CHARACTERS); LVCOLUMN column; // character column.mask = LVCF_TEXT|LVCF_WIDTH|LVCF_SUBITEM; column.pszText = "Character name"; column.cx = 200; column.iSubItem = 1; SendMessage(hList, LVM_INSERTCOLUMN, 0, (LPARAM)&column); // number of bones column.mask = LVCF_TEXT|LVCF_WIDTH|LVCF_SUBITEM; column.pszText = "Number of Bones"; column.cx = 90; column.iSubItem = 2; SendMessage(hList, LVM_INSERTCOLUMN, 0, (LPARAM)&column); LVITEM item; item.mask = LVIF_TEXT|LVIF_; item.pszText = "This is a test"; item.iItem = 0; item.iSubItem = 1; SendMessage(hList, LVM_INSERTITEM, 0, (LPARAM)&item); item.mask = LVIF_TEXT; item.pszText = "asdasdasdasd"; item.iItem = 1; item.iSubItem = 2; SendMessage(hList, LVM_INSERTITEM, 0, (LPARAM)&item); </code> When this finishes, there are no items listed in my list control. I have stepped through the code and everything looks fine except that the result from LVM_INSERTITEM is -1; This is weird, I can insert the columns, what would be wrong with the item? Anyone see a problem with this? Thanks for reading, Steve Tag: Compiler warnings... Tag: 255672
  - 17
    - Question on Crypto API Hi, Using the Crypto API, we wrote a progam to store our company generated certificates and associated private and public key pair under the store location CERT_SYSTEM_STORE_CURRENT_USER and under the store name MY. When we access the SSL sites via IE, we noticed that our comapny certificates shows up on the Client authentication dialog box. Is there any way to set our certificates so that our company certificates does NOT get displayed on the Client authentication dialog box?. Thank you Tag: Compiler warnings... Tag: 255669
  - 18
    - String Manipulations Can anyone provide information for how to retrieve the actual character string from a CString object? I am using the following code but it only returns the address of the string and not the literal characters of the string. I know it has to be something simple that I am overlooking but I have copied samples from MS that are supposed to work but give the same results CString strSports("Hockey is Best!"); TCHAR sz[1024]; lstrcpy(sz, strSports); cout << strSports ; If I follow documentation provided by Microsoft which states: // while this line will put the content of the string out: cout << (LPCTSTR) strSports; I still only receive the address of the CString object at the console. Please help! Tag: Compiler warnings... Tag: 255664
  - 19
    - Will the following code assert: // headers... int main () { double d = 0; ASSERT (d == 0); } ? Or is it machine/[HW/SW]floating-point processing dependent? Might 1.0E-1024 be a convenient way to store zero on some machines? Is there any certainty with doubles of floats or do we 100% of the time have to call fabs with some precision spec? Thanks in advance, - Alan Tag: Compiler warnings... Tag: 255661
  - 20
    - Dynamic allocation of 2D character array? I am trying to set up a 2D array of characters using 'new'. The following looks OK to me but is not accepted by the compiler: char *2d_array ; 2d_array = new char[10][100] ; Can anyone tell me the correct way to do this? Also, please tell me the correct syntax for deallocating the memory when it is no longer required. With thanks, Gerry Tag: Compiler warnings... Tag: 255653
  - 21
    - about runtime lib hi, all, just curious, microsoft provides these six libs: 1) MT/d multi-thread, static link release and debug 2) MD/d multi-thread, dynamic link release and debug 2) ML/d single-thread, static link release and debug why isn't the single thread dynamic lib be provided? thanks Tag: Compiler warnings... Tag: 255644
  - 22
    - Qsort not working I'm using qsort to sort an array of Doubles. However, it is not working. Does anyone know why? // Here is the compare function. int classA::compareValueByAscendOrder(const void* arg1, const void* arg2) { double* value_1 = (double*)arg1; double* value_2 = (double*)arg2; double delta_value = value_1 - value_2; if( delta_value < 0 ) { return -1; } else { if( delta_value > 0 ) { return 1; } else { return 0; } } } // Here is the calling function CArray<double, double> temp_array; temp_array.Add( 5 ); temp_array.Add( 3 ); temp_array.Add( 4 ); temp_array.Add( 2 ); qsort( temp_array.GetData(), temp_array.GetSize(), sizeof(double), compareValueByAscendOrder ); // After qsort, the array is not sorted. ===================== 5 3 4 2 after qsort 5 3 4 2 ===================== Tag: Compiler warnings... Tag: 255643
  - 23
    - How will it new/allocate memory on windows2003 when a class have string-type members? HI,all I have a class named CCC which have some members of std::string type. I declare a class pointer like this: CCC* ccc = new CCC( xml_input ); then I send the ccc to another module within the process with msg_queue. then this lead to a error on windows 2003 platform, but it's works well on Redhat Linux 9.0. In addition, I find out the same binary execute file could work well on windows XP, but It faild on my windows 2003. I debug it, and It's assert when the object pointer ccc is released. what's the reason??? the error info on windows as follows: =============================================================== --------------------------- Microsoft Visual C++ Debug Library --------------------------- Debug Assertion Failed! Program: E:\works\server\debug\configer.exe File: dbgheap.c Line: 1132 Expression: _CrtIsValidHeapPointer(pUserData) For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts. (Press Retry to debug the application) =============================================================== Tag: Compiler warnings... Tag: 255642
  - 24
    - systematic debugging of random freeze in debug mode My code contains a loop that has to perform calculations on data streamed from a circular buffer. The calculation has to be performed 50,000+ times (about 30 ms per cycle) spitting out a number after each cycle. The thing freezes in a poissonic manner (i.e. sometimes after 10 seconds of data aquizition, sometimes after 10 min of data aquizition, etc). I do have the debugger attached. The program just stops responding and I only can terminate it by "Debug->Stop debugging". There are no indiciations in the Debug output window which would warn me of the onset of the freeze. Since the freeze happens randomly, and I don't see any feedback in the debugger, I am puzzled how I can systematically debug this thing. Can anyone give a spepific advice on where I could start? Tag: Compiler warnings... Tag: 255621
  - 25
    - visual c++ / write to cout in binary mode? Visual C++: How can I write to std::cout in binary mode? Helmut Tag: Compiler warnings... Tag: 255614

I writing some software that makes extensive use of ATL but the compiler is
coming up with alot of warningswhile compiling the ATL source code!

The warning are C4996 and C4995, they complain about certain functions being
deprecated.

The question is, is there some compiler option I can switch on to stop these
warnings or is it better to go and modify the ATL source and replace the
deprecated functions calls with their newer versions?

--
Best regards
Mark

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Re: Compiler warnings... by Igor

Igor
Sat Nov 26 10:00:04 CST 2005

"Mark" <swozz_@hotmail.com> wrote in message
news:OZ4h%232p8FHA.2800@TK2MSFTNGP10.phx.gbl
> I writing some software that makes extensive use of ATL but the
> compiler is coming up with alot of warningswhile compiling the ATL
> source code!
> The warning are C4996 and C4995, they complain about certain
> functions being deprecated.
>
> The question is, is there some compiler option I can switch on to
> stop these warnings or is it better to go and modify the ATL source
> and replace the deprecated functions calls with their newer versions?

See http://msdn2.microsoft.com/en-us/library/ttcz0bys.aspx, particularly
the part about _ATL_SECURE_NO_DEPRECATE macro.
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925

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Re: Compiler warnings... by Scherbina

Scherbina
Sat Nov 26 16:10:17 CST 2005

In addition to Igor's post - to disable those warnings you can also use
#pragma warning(disable : 4996)#pragma warning(disable : 4995)--
Scherbina Vladimir

"Mark" <swozz_@hotmail.com> wrote in message
news:OZ4h%232p8FHA.2800@TK2MSFTNGP10.phx.gbl...
>I writing some software that makes extensive use of ATL but the compiler is
>coming up with alot of warningswhile compiling the ATL source code!
>
> The warning are C4996 and C4995, they complain about certain functions
> being deprecated.
>
> The question is, is there some compiler option I can switch on to stop
> these warnings or is it better to go and modify the ATL source and replace
> the deprecated functions calls with their newer versions?
>
> --
> Best regards
> Mark
>
>

Top