temporary objects in VC++ 6.0 vs VC++ 7.1

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  - 1
    - How to supress the compile error on STL code? Hi, I am using VC7 compiler, my code uses STL a lot. I find that, if there are some code error, the compiler prints out a lot of error messages, most of them are about STL, for example, c:\STL\export\stdexcept(74) : see reference to class template instantiation '_STL::basic_s ring<_CharT,_Traits,_Alloc>' being compiled with [ _CharT=char, _Traits=_STL::char_traits<char>, _Alloc=_STL::allocator<char> ] While the real problem is in my code, even though VC compiler correctly indentifies the error line, with so many STL messages, it is hard to look for the real error message. I wonder if there are some way to supress them? Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265794
  - 2
    - rs232-[B] Success! rs232 communications between VC++ and a PIC microcontroller have been established! What a relief! I *must* be very thankfull to the news groups for this ! You guys were great, and I would of never of made it without your help! Although all was constructive, I ran into one last but simple question! As I have been learning VC++ and some of all of its vast world of programming, Windows data types have creeped back, and as I looked at posts on this from 6 months ago, I feel I would still need some guidence regarding this particular issue. So here is my question: As VC++ is the software that I am using on the PC end, as you may know, one of the methods of the serial class is : MySerial.Write("x"); Therefore as you know, the first parameter of the "Write" function takes a LPCSTR. You see.... at the microcontroller end, the C code reads this byte by the following line: c=getc(); in the code fragment below: ===================== void get_string(char* s) { int len; char c; len = 0; do { c=getc(); //getc is a ready made function by the compiler which waits // for a character to be received. So until VC++ doesn't // send something, the controller stays at this line! if ((c>=' ')&&(c<='~')) //if 'c' is within range, then append to array s[len++]=c; } while(c!=13); //Wait for enter key! ...other code... ====================== In the above code, I have only included the pertaining lines to my question, but its pretty much representative of what the function consists of. So, in the above code, it waits for a character and once recieved, it appends it to "s". So, if VC++ sends a "B", then a "B" will be appended in the string array "s". This continues until VC++ sends a ascii code for "enter key", which is ascii code 13. My question is, given the code shown above for the *PC end*, how would VC++ , by using code, send an "enter" or a "13" in this case? I tried, MySerial.Write("13"); //The controller only reads: "1" instead of 13 The next line doesn't work either: MySerial.Write(13); And before I try all kinds of type castings, I would prefer to get some understanding of what needs to be done. I mean, if MySetrial.Write() takes a LPCSTR and the C language at the controller end needs to see a 13 to understand that VC++ sent the 'enter key' code, then I need to convert 13 to "13"... right? What's happens now, is that the controller doesn't recognize 13, no matter which of the following commands I do: MySerial.Write(13); or MySerial.Write("13"); or int x; x=13; MySerial.Write((WCHAR)x); //Which makes no sence, since it expects a LPCSTR If I may be excused on this one, its been a while since I have been set straight on Windows data types, even though given the fact that the news groups have done more than great job at explaining me this stuff months ago! All help much appreciated! And again, thankyou all fellow newsgroups! -- Kind regards Roberto Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265790
  - 3
    - #pragma ( default : 4061) not working I want to enable warning C4061 in VC6 SP5 (for some reason, my company isn't approving SP6), which alerts you if a switch statement on an enumerated type doesn't handle all of the enum's members. Even in the simplest case, it does not work for me: --------------- #pragma warning (default : 4061) enum prag{ALPHA, BETA, GAMMA}; void f(prag p) { switch(p) { case ALPHA : case GAMMA : break; } } void main() {} --------------- I have cleaned and rebuilt many times on every warning level. Does anyone have any insight into why it isn't working? I also tried C4062 and had the same problem. Thank you very much. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265782
  - 4
    - exhaustive switch bound checking See the program fragment below. I have tried it on VC8 x64. //-------------------------------------------- extern unsigned char fetch_byte(); void dispatch() { while(true) { switch(fetch_byte()) { case 0: ...; break; case 1: ...; break; ... case 255: ...; break; } } } //--------------------------------------------- VC generates a jump table for the switch statement. The case is exhaustive with respect to the unsigned char type. However, VC generates a bound check before indexing in the jump table: movzx r11d, al cmp r11d, 255 ; 000000ffH ja SHORT $LL260@dispatch_c mov edx, DWORD PTR $LN776@dispatch_c[rdi+r11*4] add rdx, rdi jmp rdx The first three lines here can be ommitted. The question is: how do I make the compiler to omit the checks? Note, that the same problem appears with an exhausinve switch for an enum type. Thanks in advance, Artem Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265778
  - 5
    - CToolbarCtrl problem I have created a class derived from CToolbarCtrl. in this class i have added some push buttons and some dropdown buttons.In which one of them is setting button.when i click this button a property sheet is displayed in which i can select and deselect a lot of options about to display a specif button on the toolbar or not. Suppose when the user selects the checkbox of "Mails" and then apply button pressed ,i want to appear that button on the toolbar and if S/He Uncheck the "Mails" checkbox i want to disappear the toolbar Mails button. to solve this problem i have send a user defined message from the propertyPage class to the toolbar so that in this message handler i could place my code to Appear/Disappear my "mails" button. I m trying to use the function HideButton() of CToolbarCtrl class in my user defined message handler but this is not working.i want that when user press the apply button the button should be reflect the changes. another way i have tried is that the buttons which i have added into the toolbar ,itried to set their "fsState" to TBSTATE_ENABLE or TBSTATE_HIDDEN, these techniques work but when i close the IE instance and start it again.i just want to reflect the changes the user have made in the Option page of propertysheet class. plz help me where i m making a mistake. Another thing is that i have make a funtion "Create" in the CToolbarCtrl derived class in which i m adding the buttons in the toolbar.and this is used as a Dll. plz tell me . Thanks in advance. CrimeMaster Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265777
  - 6
    - CToolbarCtrl problem I have created a class derived from CToolbarCtrl. in this class i have added some push buttons and some dropdown buttons.In which one of them is setting button.when i click this button a property sheet is displayed in which i can select and deselect a lot of options about to display a specif button on the toolbar or not. Suppose when the user selects the checkbox of "Mails" and then apply button pressed ,i want to appear that button on the toolbar and if S/He Uncheck the "Mails" checkbox i want to disappear the toolbar Mails button. to solve this problem i have send a user defined message from the propertyPage class to the toolbar so that in this message handler i could place my code to Appear/Disappear my "mails" button. I m trying to use the function HideButton() of CToolbarCtrl class in my user defined message handler but this is not working.i want that when user press the apply button the button should be reflect the changes. another way i have tried is that the buttons which i have added into the toolbar ,itried to set their "fsState" to TBSTATE_ENABLE or TBSTATE_HIDDEN, these techniques work but when i close the IE instance and start it again.i just want to reflect the changes the user have made in the Option page of propertysheet class. plz help me where i m making a mistake. Another thing is that i have make a funtion "Create" in the CToolbarCtrl derived class in which i m adding the buttons in the toolbar.and this is used as a Dll. plz tell me . Thanks in advance. CrimeMaster Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265776
  - 7
    - VB6 compatible Dll created with VC++6 problems using afxsock functions Hi I've got a problem using send() function (defined in afxsock.h) in a VB6 compatible DLL that I've made. Let me explain the situation : I'm coding a Server-Client application. - The server runs on a XPEmbedded Windows, and is programmed with VC++6. Sockets declarations and recv() & send() function are defined in afxsock.h. - The client runs on a Windows XP Fammily edition and is programmed in VB6. I had some problems in making the both communicate beacause of the limited size of paquets that can be send with winsock SendData in VB. More over I had already written the Client program in VC++6 using afxsock, that worked very well. So I had written a VB6 compatible DLL with VC++ that I've included in my VB code. The Dll launches well as I can display some MsgBox, but the characters send to the server aren't received altough the code is hardly the same to my VC++ client program. Are there some cautions to use send() in a Dll ? Here are some pieces of my codes: ///////////////////////////////////////// ///// Client Dll ///////////////////// ///////////////////////////////////////// #define TRANSF_DTF 20 void __stdcall Transfert_DTF(LPSTR string) { WSADATA initialisation_win32; SOCKET socketID; SOCKADDR_IN Sock_addr; unsigned char buffer[PAQUETETH]; unsigned char buffer_ack[4]; HANDLE hFile; char temp[30]; int packetnbr, packetnbr_ack; int size; MessageBox(NULL,"Enter the DLL","Message",MB_OK); hFile =3D CreateFile( string, // open file GENERIC_READ, // open for reading FILE_SHARE_READ, // share for reading NULL, // no security OPEN_EXISTING, // existing file only FILE_ATTRIBUTE_NORMAL, // normal file NULL); // no attr. template if (hFile =3D=3D INVALID_HANDLE_VALUE) { MessageBox(NULL, "Error", "Message", MB_OK); } size =3D GetFileSize(hFile,NULL); sprintf(temp, "size : %d", size); MessageBox(NULL,temp,"Message",MB_OK); // ******************************************************** // Winsock Initialization erreur=3DWSAStartup(MAKEWORD(2,2),&initialisation_win32); socketID=3Dsocket(AF_INET,SOCK_STREAM,0); Sock_addr.sin_family=3DAF_INET; Sock_addr.sin_addr.s_addr=3Dinet_addr("192.168.0.2"); Sock_addr.sin_port=3Dhtons(8686); connect(socketID,(struct sockaddr*)&Sock_addr,sizeof(Sock_addr)); buffer_ack[3] =3D TRANSF_DTF; compt =3D send(socketID, (char*)buffer_ack, 4, 0); sprintf(temp, "Send : %d", compt); MessageBox(NULL,temp,"Message",MB_OK); compt =3D recv(socketID,(char*)buffer_ack,4,0); sprintf(temp, "Recv : %d", compt); MessageBox(NULL,temp,"Message",MB_OK); ///////////////////////////////////////////////////////////// ////////////////////////// ///// Server/////////// ////////////////////////// // Same initialisations, then : // transf_sock =3D accept(socketID,(struct sockaddr*)&Socket_addr.sin_addr,NULL); popup(hWnd, "accepted", 40, NOIR); // display function if(transf_sock =3D=3D INVALID_SOCKET) { sprintf(temp,"error invalid transf_sock n=B0 %d", WSAGetLastError()); popup(hWnd, temp, 10, NOIR); } recv(transf_sock,(char*)buffer_ack,4,NULL); sprintf(temp, "interception : % d\n", (UCHAR)buffer_ack[3]); popup(hWnd, temp, 70, NOIR); ///////////////////////////////////////////////////////////// Both programs are blocked as the server don't receive the first 4 bytes...=20 Someone can help me ?=20 Thanks.=20 Matthieu. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265775
  - 8
    - coderwiki.com is starting and needs you! i'm starting a wiki on coding, keeping everything seperate. anyone who wants to help check out the site. i want to document every function for every language ever www.coderwiki.com Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265769
  - 9
    - InternetOpenURL but with password Ok, I use InternetOpen, followed by InternetOpenURL, followed by InternetReadFile to read certain files off of my server. Now I want to use it, to open a file that is in some admin section of the server. When I open that URL using IE, IE asks me for the name and password. As a test I tried that URL on my current app, and the file that came back as authorization required, no prompt anywhere for a password or username. How can I do this in C (not C++ mind you)? And how can I do it safely? Or does wininet.lib handle this? Thanks ahead. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265768
  - 10
    - Can all functions of a static library be compiled in without any calls Can a static library be linked in as a resource or something so that all functions inside are available even if they are not called by the executable? Thanks, Drew Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265763
  - 11
    - Message Compiler - specify customer bit per message Iâ??m very new to C++ (three weeks of learning on my own) so please bear with me. Iâ??m creating my first message file to be compiled with the mc.exe message compiler and I want to turn on the customer bit for certain error codes and not others. It looks like the only way to turn on the customer bit is by using the â??c switch on mc.exe. Unfortunately that causes ALL error codes to use the customer bit. Is there a way to do this without creating two separate message files? (One with the customer bit and one without) Hereâ??s the specific scenario in case the question wasnâ??t clear. Iâ??m creating a message file contains event messages/error codes and event categories/codes. Turning the customer bit (bit 29) on for ALL the messages means that you need 32bits to reference any of the messages. But since the ReportEvent function uses a 16bit variable for the category code, you have no way to reference the 32bit category codes. Thanks in advance for your help. -- I''m a very intelligent person... unfortunately I lack the vocabulary to express my ideas. :) Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265761
  - 12
    - SOME THING ABOUT MESSAGE PASSING Hi i have CToolbarCtrl drived class.this tool bar has a lot of buttons,in which one button call's a Dialog. I Want to send a message from my dialog class to the toolbar class when a specific button is clickd.the problem is that when we send a message to any control class we need its HWND.I have a problem here that how i can got the HWND of toolbar in dialog class to send the messge. the structure of mt program like this this is just an example. class mytoolbar { dialog is a member of this class which is called when a specific button of toolbar is called. | class { this is the dialog class,i want to now send a message to the mytoolbar class when a specific message of this dialog is pressed. } plz tell me some one about that i m just confused. Thanks in advance. CrimeMaster Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265751
  - 13
    - Changes to the C4244 warning? We compile our code under warning level 4 and want to have the C4244 warning enabled as it sometimes catch problems in the code. However, consider the following code: unsigned char a, b; a += b; // Generates warning a = a + b; // Does not generate warning The problem is that C++ will expand the type of the + expression to int and then implicitly convert the int to unsigned char, which should generate a warning. We dunno if the compiler folks at Microsoft thought "hey thats silly to warn here" and disabled the warning for the regular assigment but forgot to disable it for the += assignment or if they made an error not reporting the implicit conversion of the type in the regular assignment with the C4244 warning. We would very much like VC would not warn for either assignment operators when types are implicitly expanded and then implicitly reduced as this is never a warning you care about. Currently, we have to use the second form to avoid the warning but if the VC teams decides to warn here also we really need to write: a = (unsigned char)(a + b); And this kinda sucks. (Although it is really C++ that sucks here) Regards Ulf Johansen Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265746
  - 14
    - Barcode generator how to generate Barcode ? any Algorithm, codes i have read barcode reader .. but yet to come across the barcode genarator ... waiting for ur response, thanks, Jayender Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265742
  - 15
    - Detecting beep sound on a m/c Hi, My application needs to detect when a system sound (beep) occurs on the m/c. The platforms to be supported are Win XP and 2K. How do I detect these beeps? Are there any examples available? TIA, SD Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265741
  - 16
    - Access Violation in Unicode Debug. The following problem occurs in unicode debug config: A socket connection handler class CMclSocket has a derived class CHttpProtoFile. A function Send() of the base class is called in the derived class in the OnConnect handler. Untill this function is called in the derived class the member variables of the base class r acessible. Once this function is called, accessing the member variables inside this function in the base class throws '0xC0000005: Access Violation.' error while running the application. This application works fine in debug config. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265740
  - 17
    - Help!! %n is diabled in sprintf in VS 2005 Hi, We have some code that uses %n as a conversion specifier in sprintf. That used to work fine in VC 6.0 and also in UNIX. But now, in VS 2005 that sprintf statement crashes. During the debugging I found that %n support is disabled in the source file output.c. I do need to use the dll version of the C run time library. Is there any way I can continue to link to the C run time library without any source code change? Do I have to change all my existing code to use sprintf_s which requires an additional argument? If that is the case it is a pain. What happens to the portability? Unix does not have sprintf_s. Thanks, Vnm Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265730
  - 18
    - VC6 SP6 I have installed SP6 for VC6. This was done to deal with a problem with the ios destructor issue referred to in KB814308. After installing the service pack the file _ios.cpp was still the same that was in previous service packs (date on the file, 2000-06-13). If you refer to the individual knowledge base article it shows a file with the date of 2003-02-05. I was wondering does anyone have the hot fix that is referred to in the knowledge base article. I have asked a support person at Microsoft as we have an outstanding issue with named pipes and when he looked into finding the hotfix he said that he was unable to locate it. Thanks for any help Allan McLellan Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265725
  - 19
    - rs232 - [A] Hello, As per reference to my prvious post "rs232", (I have continued it here for a fresh start on my prblem) Thanks! I have added 6 serial cpp files and their headers to my project. Please see errors at bottom of this post! Please consider the following code: ================================================== #include <windows.h> #include "WndProc_CW1.h" //#define STRICT #include <tchar.h> #include "Serial.h" #include "Serial.cpp" #include "SerialEx.h" #include "SerialEx.cpp" #include "SerialWnd.h" #include "SerialWnd.cpp" LRESULT CALLBACK WndProc_CW1 (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { CSerialWnd MySerial; ...other code.... } =================================================== here are the errors: c:\_DTS_PROGRAMMING\C_PROGRAMMING\vc++\MY_APPS_LAB\RS232Test_XPPLC\Serial.cpp(23): warning C4005: 'STRICT' : macro redefinition -Considering this error, I have tried to remove the define macro in other "Serial.x" files and it was catastrophic! I don't beleive I would have to do some "preprocessor conditional compilations" (#if #else) stuff do I? c:\_DTS_PROGRAMMING\C_PROGRAMMING\vc++\MY_APPS_LAB\RS232Test_XPPLC\SerialEx.cpp(51): error C2370: 'THIS_FILE' : redefinition; different storage class c:\_DTS_PROGRAMMING\C_PROGRAMMING\vc++\MY_APPS_LAB\RS232Test_XPPLC\SerialWnd.cpp(51): error C2370: 'THIS_FILE' : redefinition; different storage class Thanking you in advance for your feedback. -- Best regards Robert Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265722
  - 20
    - Band with fixed size?! Hello, I implemented a DeskBand. I want to make it fixed, so that the user cannot resize it in the taskbar. the minimum size works fine, but the maximum size not: #define DB_SIZE_X 100 #define DB_SIZE_Y 25 STDMETHODIMP CDeskBand::GetBandInfo(DWORD dwBandID, DWORD dwViewMode, DESKBANDINFO* pdbi) { if(pdbi) { m_dwBandID = dwBandID; m_dwViewMode = dwViewMode; if(pdbi->dwMask & DBIM_MINSIZE) { if(DBIF_VIEWMODE_FLOATING & dwViewMode) { pdbi->ptMinSize.x = DB_SIZE_X; pdbi->ptMinSize.y = DB_SIZE_Y; } else { pdbi->ptMinSize.x = DB_SIZE_X; pdbi->ptMinSize.y = DB_SIZE_Y; } } if(pdbi->dwMask & DBIM_MAXSIZE) { pdbi->ptMaxSize.x = DB_SIZE_X; <<<< pdbi->ptMaxSize.y = DB_SIZE_Y; <<<< } if(pdbi->dwMask & DBIM_INTEGRAL) { pdbi->ptIntegral.x = DB_SIZE_X; pdbi->ptIntegral.y = DB_SIZE_Y; } if(pdbi->dwMask & DBIM_ACTUAL) { pdbi->ptActual.x = DB_SIZE_X; pdbi->ptActual.y = DB_SIZE_Y; } if(pdbi->dwMask & DBIM_TITLE) { StringCchCopyW(pdbi->wszTitle, 256, L"band"); } if(pdbi->dwMask & DBIM_MODEFLAGS) { pdbi->dwModeFlags = DBIMF_NORMAL; pdbi->dwModeFlags |= DBIMF_VARIABLEHEIGHT; } if(pdbi->dwMask & DBIM_BKCOLOR) { pdbi->dwMask &= ~DBIM_BKCOLOR; } return S_OK; } return E_INVALIDARG; } Thanks Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265721
  - 21
    - Can We Read Text data From an EXE HI I have an Exe file when it runs ,there are just two controls on the window.One is a ListBox and another is a Multi line Rich Edit control.When i click on an item in the list some text is displayed in the Edit control.Exe have a Hunderds of items in the List controls,which display some text in edit control against an item selection. I want to read that data which is displayed in edit control against the selection of an item in list controls .and want to place that data in a Word file.Can any body tell me how i can do that.is there any API's available to read that data.plz tell me. Crime Master Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265716
  - 22
    - LNK 4210 comes when i migrate from VC6.0 to VC8.0 Hi, I had a DLL build using VC 6.0. I migrated the Source to VC8.0. Now I am getting the linker error "LNK4210: .CRT section exists; there may be unhandled static initializers or terminators". Please note that I have my own DLL Entry point specified in the make file for the DLL. I have checked documentation. I have tried to call _CRT_INIT function in my entry point funtion but then i get the LNK2001 unresolved external symbol CRT_INIT. Can anybody tell me the exact problem and fix for it. As far as I can figure out the constructors for global members is called by run time library. but in this case i am not able to initialize the run time library (_CRT_INIT ??) Thanks Programmer_2004 Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265715
  - 23
    - difference between debug and release Hello, I wrote a DLL which doesn't use MFC and is plain C and C++ (not .net). The debug version is working well, but when I am trying to compile for release, it comes with the following linker error: libcpmtd.lib(xdebug.obj) : error LNK2019: unresolved external symbol __malloc_dbg referenced in function "void * __cdecl operator new(unsigned int,struct std::_DebugHeapTag_t const &,char *,int)" (??2@YAPAXIABU_DebugHeapTag_t@std@@PADH@Z) libcpmtd.lib(xdebug.obj) : error LNK2019: unresolved external symbol __free_dbg referenced in function "void __cdecl operator delete(void *,struct std::_DebugHeapTag_t const &,char *,int)" (??3@YAXPAXABU_DebugHeapTag_t@std@@PADH@Z) What is the problem and how cam I solve it? Best regards Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265711
  - 24
    - IE toolbar ,How i can reflect the Settings Hi My IE toolbar is based on the Microsoft sample KKBar. I have draw a lot of buttons on it in which some are simply pushDown buttons and some are dropdowns.Beside this I have Made a Setting button.By which user can Customize the Buttons on toolbar,means S/He can select the buttons and deselect the buttons from a Property page. This information i have placed in Windows registry.When I create the toolbar i Create the toolbar based on the registry data that which button i have to appear and to which Button i have to HIde . I have completely Done it.they appear and disappear properly. But the trouble starts when i Create the toolbar i can decide From the registry data that which button i have to make appear and which button i have to make disappear. If the user Selects the setting and change the options (suppose he want to display one more button from the setting),How i can refresh my toolbar to show that button on the same instance of IE. Plz if some one knows tell me .i will be thankful to him.Buttons are displayed when i start another instance of IE,this is just bcoz the Data in the registry has been changed by the previous instance,But i want also to be on the instance that is changing the options. Crime Master Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265706
  - 25
    - setup.exe bug for VC6 (and VB6) Am am attempting to install VC6 and VB6 on a new "XP Media Edition" machine, and for both the setup.exe posts a fatal error and closes immediately. Anyone have solution? Much appreciated, Beau, beau@omatrix.com Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265698
- Next
  - 1
    - Visual Basic / C++ What is the best way to have a Visual Basic program interface with a C++ class? Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265691
  - 2
    - MOVDQA generates exception <also accidently posted in vs.dotnet.languages> Using Visual Studio 2005 C++ compiler, I am getting a MOVDQA(in x64 mode) generated on an unaligned stack address. I actually have a debug screen shot showing RSP being set correctly at the start of the function. Here is the code: ; RSP = FFFB00 here, all numbers are in hex mov qword ptr [rsp+18], r8 mov qword ptr [rsp+10], rdx mov qword ptr [rsp+8], rcx push rbx push rbp push rsi push rdi mov rax, rsp sub rsp, 00000978 xor ebp, ebp movdqa [rax-18], xmm6 ; exception generated here -- Tim Lewis System Firmware Architect Phoenix Technologies Ltd. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265688
  - 3
    - InterlockedCompareExchange64 under VC++ 6.0: in-line assembly using cmpxchg8b ?? I am trying to implement an atomic compare-and-exchange of a "double" type, under VC++ 6.0 for WinXP. The Windows API function of InterlockedCompareExchange64 is not available for WinXP (it's only available for Vista, see http://msdn.microsoft.com/library/en-us/dllproc/base/interlockedcompareexchange64.asp ) . There is a compiler intrinsic function of _InterlockedCompareExchange64 (see http://msdn2.microsoft.com/en-us/library/ttk2z1ws(VS.80).aspx ), but this intrinsic seems to be available only for more recent versions of VC++ (such as VC++ 2005), and it's not available as an intrinsic for VC++ 6.0. So, I think that I need an in-line assembly function which, like the 2005 compiler intrinsic, uses the cmpxchg8b instruction. In-line assembly, however, is beyond my capability. I found user-mode code that uses in-line assembly and the cmpxchg8b instruction at this thread in microsoft.public.win32.programmer.kernel (see the next-to-last post): http://groups.google.com/group/microsoft.public.win32.programmer.kernel/browse_thread/thread/ecc0a35d9fcef3b5/0e3b6a23d301a62a . The code doesn't work for me. Here's what I mean by "doesn't work": I implemented the function in a singly-threaded environment, simply to test whether the function properly stores the correct double value at the destination location. As expected (since we're in a singly-threaded environment), the function's return value indicates that the current value of the destination agrees with the comparand's value, and that the exchange was successful. However, the value that actually gets stored at the destination address is bizarrely corrupted, and does not agree with the exchange value. Can anyone offer any insights (other than a suggestion to upgrade to VC++ 2005)? Maybe someone knows of the assembly code used by the current compiler's intrinsic? Best, Mike Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265685
  - 4
    - Send/Post Messages on Vista Hi all, There're two apps, A and B on Vista. Using FindWindow() with caption of a window, it proves that B can find the window of A. However when B calling PostMessage() to shot down A of the window, it doesn't work. My understanding is that both A and B are in the same session since they are running under the same user login. Does this mean that both SendMessage() or PostMessage() will not work anymore even in the same session on Vista? If not, there's a way to implement this, better off without any dialog pop-up for user's interaction? Thanks, DH Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265681
  - 5
    - rs232! Hello, As I read the following document a few times at: http://www.codeproject.com/system/serial.asp given to me by fellow friend Jochen in my previous post I am ready to give rs232 a crack at it! :) I am using the "Windows messages" option of rs232 interfacing (See document). In spite of me using VC++ for 9 months now, I still consider myself a beginer when it comes to much of the language and especially the VC++ GUI. Here is my first problem. I have started to code for the rs232 as indicated in the above link's web document as so: #define STRICT #include <tchar.h> #include <windows.h> #include "CSerialWnd.h" I still don't know what the "#define STRICT" statement is doing there? But I am just copying the sample. Given the above include statements I get the following error at build time: c:\_DTS_PROGRAMMING\C_PROGRAMMING\vc++\MY_APPS_LAB\RS232Test_XPPLC\WndProc_CW1.cpp(20): fatal error C1083: Cannot open include file: 'CSerialWnd.h': No such file or directory In the document, it clearly states that I need to include the serial class header file, in which I did, and I must make sure that the header-files of this library are in my compiler's include path. Up to now all I am used to is including windows.h and some odd header file that I created. I don't know how to include the header files of CSerialWnd library in my compiler's include path. I didn't get very far, but its a start and I don't know what to do, I tried to look at the project properties to see if there is a field that requires include paths, or something like this.... I would appreciate any guidence or direction towards this! Any help is very appreciated! Thanks -- Best regards Robert Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265672
  - 6
    - Porting a DOS application to W32. I need to port a DOS application to W32. The old application wrote and read the hardware directly. I know I need to use W32 SDK to access COM ports connected to USB Devices. What sould I download to solve the problem? I suppose I don't have to download the complete SDK. Links will be very appreciated. Thanks H. Martins Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265664
  - 7
    - SetWindowPos, HWND_TOP will reduce speed? Hi All, I put SetWindowPos in InitInstance, is that correct? and I feel when I use HWND_TOP, it will decrease the app speed... and the task monitor become very busy... Best regards, Boki. ///////////////////////////////////////////////////////////////////////////////// BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) { HWND hWnd; hInst = hInstance; // Store instance handle in our global variable ghWnd = hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); if (!hWnd) { return FALSE; } :: SetWindowPos( ghWnd, HWND_TOP, 800, 450, 160, 175, SWP_SHOWWINDOW ); ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return TRUE; } Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265656
  - 8
    - Help on Application Desktop Toolbars Hi Recently I have wrote a program that display the AppBar on top of the screen. The Appbar window will not overlap other maximized windows, which means the windows title bar will not be blocked by the appbar window. However, when I run the appbar program within a service program (execute the exe file using CreateProcess API), the AppBar window will overlap other windows and block their titlebar. Anyone know how to solve this issue? Appreciate your help. Tham Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265652
  - 9
    - Need VB str() to show debug msg. Hi All, I use TextOut (hdc, 10, 250, psText, 9) ; to output msg. But I want to output integer/long not only char, Does it mean I have to use str(variable) first? Thank you very much! Best regards, Boki. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265651
  - 10
    - Graphic API, stretch Hi All, I have a picture, I want to it be repaint as stretch not original size. I know how to use stretch API. but I remember that is copy from a HDC, how to do that in my app? Best regards, Boki. /////////////////////////////////////////////////////////////////////////////// case WM_PAINT: hdc = BeginPaint(hWnd, &ps); // TextOut (hdc, 10, 250, psText, 9) ; if (gpPicture) { // get width and height of picture long hmWidth; long hmHeight; gpPicture->get_Width(&hmWidth); gpPicture->get_Height(&hmHeight); // convert himetric to pixels int nWidth = MulDiv(hmWidth, GetDeviceCaps(hdc, LOGPIXELSX), HIMETRIC_INCH); int nHeight = MulDiv(hmHeight, GetDeviceCaps(hdc, LOGPIXELSY), HIMETRIC_INCH); RECT rc; GetClientRect(hWnd, &rc); // display picture using IPicture::Render gpPicture->Render(hdc, 0, 0, nWidth, nHeight, 0, hmHeight, hmWidth, -hmHeight, &rc); } EndPaint(hWnd, &ps); break; /////////////////////////////////////////////////////////////////////////////// Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265650
  - 11
    - debug run-time down.. Hi All, When program down in run-time, does it possible where down? Best regards, Boki. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265646
  - 12
    - How to set the form size (WIN32) Hi All, Could you please advice that how to set the form size (WIN32)? My form is a litte bigger than I want. and I want to it can be dynamic adjustable. Best regards, Boki. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265639
  - 13
    - Finding dependencies I'm moving a project from VS6 to VS2005 and am having a problem linking: cannot open file 'mfc42.lib' Is there a way to determine what file has this dependency? Thanks, Drew Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265631
  - 14
    - How to make an app elevated silently? Hi all, Regarding UAC on Vista, an app needs to run with Administrator Privileges (full, or not-full-but-higher than Standard User's). The app will be installed by an Installer. Is there a way to elevate the app silent when it's installed or it's starting running, without prompt of a dialog box? Like digital signning the app to indicate it's safe to Vista, etc. Thanks, DH Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265629
  - 15
    - rs232? Hello, I find myself faced with the need to do some serial communications from VC++ to the rs232 port of my computer. Can someone directme to the pertinant commands in C or in C++ in order to do this. Thankying you for your feedback, It is much appreciated! Best regards Roberto -- Best regards Robert Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265618
  - 16
    - Linker Error when compling to debug versus release version. This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C693B0.B98005A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Using VS .Net 2003 compiling and linking a windows dll project.=20 When doing release build, the build and link function succeed. If I then = try to do a Debug build I get 737 unresolved links of the type shown = below: General Components error LNK2001: unresolved external symbol "bool = __cdecl IdentSyntax(class ATL::CStringT<char,class = StrTraitMFC<char,class ATL::ChTraitsCRT<char> > > *)" = (?IdentSyntax@@YA_NPAV?$CStringT@DV?$StrTraitMFC@DV?$ChTraitsCRT@D@ATL@@@= @@ATL@@@Z) AFAIK, the settings are correct but then maybe I'm just to close to the = project. Any input would be appreciated. Thanks, Mike ------=_NextPart_000_0006_01C693B0.B98005A0 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 6.00.5346.5" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Using VS .Net 2003 compiling and = linking a windows=20 dll project. </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>When doing release build, the build and = link=20 function succeed. If I then try to do a Debug build I get 737 unresolved = links=20 of the type shown below:</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>General Components error LNK2001: = unresolved=20 external symbol "bool __cdecl IdentSyntax(class = ATL::CStringT<char,class=20 StrTraitMFC<char,class ATL::ChTraitsCRT<char> > > *)" (<A = href=3D"mailto:?IdentSyntax@@YA_NPAV?$CStringT@DV?$StrTraitMFC@DV?$ChTrai= tsCRT@D@ATL@@@@@ATL@@@Z">?IdentSyntax@@YA_NPAV?$CStringT@DV?$StrTraitMFC@= DV?$ChTraitsCRT@D@ATL@@@@@ATL@@@Z</A>)<BR></FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>AFAIK, the settings are correct but = then maybe I'm=20 just to close to the project. Any input would be = appreciated.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Mike</DIV></FONT></BODY></HTML> ------=_NextPart_000_0006_01C693B0.B98005A0-- Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265616
  - 17
    - 13 bit bitfield I'm trying to define the IPv4 header using bitfields. The fragment flags and offset look like this: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Identification |Flags| Fragment Offset | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ I tried this:typedef struct IPV4_HDR{...uint16_t ip_id; /* identification */uint16_t ip_mf:1; /* more fragments flag */uint16_t ip_df:1; /* dont fragment flag */uint16_t ip_evil:1; /* evil bit */uint16_t ip_fo:13; /* fragment offset */...} IPV4_HDR;Which results in this packing:|OOOOOOOO|FFFOOOOO|Where the Os are the fragment offset and the Fs are the flag bits. As you can see,the 13 bit field is byte swapped, as you'd expect if the 13 bit field reallywas an unsigned short. But this isn't how the field is layed out on the wire.Is there any way to do this using bitfields on the Microsoft compiler? Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265612
  - 18
    - App Settings in Vista Hello, How do I get acces to the registry for my application settings when user account controll is active in vista?! If it's disabled, it's no problem to write my app settings to the registry. if enabled, it's blocked. I need to write to HKLM\Software\... Thanks Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265609
  - 19
    - Monitor a directory using WaitForMultipleObjects Platform : Windows2000, XP, Microsoft Visual C++ .NET (Version 7.1), Hello, I need to process the files in a directory immediately the moment it gets deposited in a directory. I am trying to achieve this by running WaitForMultipleObjects , FindFirstChangeNotificationAPI, FindNextChangeNotification in a While loop in the Run() of one of my worker threads of my multithread application. I get the events for the files that were deposited after the WaitForMultipleObjects was invoked in the while loop. However those files that get deposited in the folder in the split of second before the WaitForMultipleObjects is invoked are not getting reported i.e. I am not getting their handles. Is there any other API or code that can help em achieve the same without losing the notification of the files deposited? Any eveident problem that you see as to why this should happen? Any poitners would be of great help Thanks and Regards Ganga (Please see excerpts of code below:) int CMyWorkThread::Run() { ASSERT_VALID(GetWork()); CDirEventReceiverWork* dirWrk = dynamic_cast<CDirEventReceiverWork*>(GetWork()); try { DWORD timeout = GetCycleTime(); BOOL waitAll = FALSE; DWORD dwWaitStatus; while (TRUE) { try { dirWrk->GetEventDirectoryList(con); dwChangeHandle= FindFirstChangeNotification( lpDir, // directory to watch subDirState, // do not watch subtree FILE_NOTIFY_CHANGE_CREATION |FILE_NOTIFY_CHANGE_LAST_WRITE); // watch file name changes AddToHandleMap(dwChangeHandle, &ci); dwChangeHandles = GetHandleList(); int nHandles = m_pDirEventServer.GetHandleMap().size()+ 2; dwWaitStatus = WaitForMultipleObjects(nHandles, dwChangeHandles, waitAll, timeout); if(dwWaitStatus == WAIT_TIMEOUT ) { //Refresh receiver list continue; } if((dwWaitStatus == WAIT_OBJECT_0 + 0) || (dwWaitStatus == WAIT_OBJECT_0 + 1) ) { //signalled kill event break; } if((dwWaitStatus <= (WAIT_OBJECT_0 +1)) || (dwWaitStatus >= nHandles)) { ASSERT(false); ostringstream ost; ost << "Invalid wait return value [" << dwWaitStatus << "]"; CABIException(PROGRAM_ERROR, ost.str(), __FILE__, __LINE__); continue; } if(dwWaitStatus == m_pDirEventServer.GetHandleMap().size()) { //signalled kill event break; } //Process the files } ..................... Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265605
  - 20
    - Didn't use directX the output is flashing. Hi All, I am drawing some continus jpeg picture to screen, but the screen is flashing, not like a video .... I mean sometimes I can see some white area in the screen not all the jpeg picture..., it seems the speed is very fast, become flash... Best regards, Boki. PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE); while (msg.message!=WM_QUIT) { if (PeekMessage( &msg, NULL, 0, 0, PM_REMOVE)) { // dispatch the message TranslateMessage(&msg); DispatchMessage(&msg); } else { if (idle_load_jpg==1) { idle_load_jpg=0; LoadPictureFileI(UART_Read_Stream(4097,ImageBfr)); ////////////////// should I add it here ? InvalidateRect(ghWnd, NULL, TRUE); idle_load_jpg=1; } } } Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265598
  - 21
    - when to use virtual class xxx { public: xxx() { } int m_a; }; class yyy : public xxx { yyy() : xxx() { } }; Are there any applicable places in this code snippet that I can use the virtual operator? or pure virtual Thanks Jack Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265597
  - 22
    - Visual C/C++ 6.0. Using SEH I'm facing a problem in using SEH (structured exceptions handling) in VC 6.0. Please, create (using Visual C/C++ 6.0) an Empty Console application. Use following source to build the application: -------------------------------- class A { public: operator const __int64() const { return 33i64; // random number } }; inline bool operator!=(const A& val1, const __int64& val2) { return false; // doesnt matter what it returns } static A g_a; bool func() { __try { return (g_a != 0i64); } __finally { } return 0; } void main(void) { // Check the returned value bool bRetVal = func(); } // Place a breakpoint here and check the value of bRetVal -------------------------------- Run the application and check the value returned by func(). In my case it is 24, but it should be false <zero>. Actually (after number of tests) I found that it is a random number. Can somebody, please, explain what is going on? This code should be working, or I should get a compiler error. I'm not looking for workaround. I just want to understand - am I wrong, or there is something with the compiler. Thank you !!! * I've tried the same source using VC 2003 and it works fine. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265596
  - 23
    - Minimize app to system tray Hi, I have been googling, but no good results. So I want to know if there is a way to minimize my application to system tray and animate it like detecting processor temperature and checking battery levels... Thanks Jack Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265593
  - 24
    - When can I use operator '==' to compare two float? when can I use operator '==' to compare two float? thanks in advance. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265591
  - 25
    - Need mod operator as VB Hi All, Could you please the operator as "mod" in VB? Thank you very much! Best regards, Boki. Tag: temporary objects in VC++ 6.0 vs VC++ 7.1 Tag: 265589

Hi,
My organization recently migrated from VC++ 6.0 to VC++ 7.1. We have
found that the temporary objects created in VC++ 6.0 were not destroyed
after the end of the expression or statement, thus temporary objects
are available with in the scope where they were created. However in
VC++7.1, temporary objects are being destroyed after the statement in
which they was created. Thou C++ standard says that the temporary
objects are destroyed at the end of the statement, I am not sure why
VC++ 6.0 and 7.1 exhibit different behaviours, I would like to know if
VC++7.1 includes this new feature or it is an undefined behaviour? Also
where can I find the features/differences for 6.0 and 7.1?

thanks a lot
jk

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Re: temporary objects in VC++ 6.0 vs VC++ 7.1 by Carl

Carl
Fri Jun 23 19:33:06 CDT 2006

"JK" <JKwaits@gmail.com> wrote in message
news:1151101051.539922.273210@p79g2000cwp.googlegroups.com...
> Hi,
> My organization recently migrated from VC++ 6.0 to VC++ 7.1. We have
> found that the temporary objects created in VC++ 6.0 were not destroyed
> after the end of the expression or statement, thus temporary objects
> are available with in the scope where they were created. However in
> VC++7.1, temporary objects are being destroyed after the statement in
> which they was created. Thou C++ standard says that the temporary
> objects are destroyed at the end of the statement, I am not sure why
> VC++ 6.0 and 7.1 exhibit different behaviours, I would like to know if
> VC++7.1 includes this new feature or it is an undefined behaviour? Also
> where can I find the features/differences for 6.0 and 7.1?

VC7.1 improved C++ standards compliance in many areas, including this one.

You can find differences between VC6 and VC7.1 here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcedit/html/vcoriwhatsnewinvisualcnet2003.asp

-cd

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