Cannot add fields at runtime to a CDaoRecordSet class

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  - 1
    - bool and == Hi, Can the == operator be used with bool? Is this valid? //////////// bool a, b; bool c = a == b; //////////// Thanks, Nelson Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231815
  - 2
    - Object properties change without reason Hi Consider an object from a child class B with the parent class A. I create an Object of class B in a function that can return a pointer to the class A, then I return the Object's pointer through the function. After examining the returned Object in debug mode, like (B *) ReturnedObject, I see that some properties has got invalid. These properties are pointers to other objects of the other classes that I had created in the function and gave their pointers to my Object. But after returning it these sub-objects are gone!! Can anyone help? Mehran Ziadloo Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231811
  - 3
    - Using C++, how can I check the existence of a directory? Hi, Using Microsoft Visual C++ ver 6.0, I need to check if a directory exists. I am using PathIsDirectory() function and I included <shlwapi.h> in my file. I am calling PathIsDirectory() inside a class virtual member function. When I try to build the program I am getting these 2 errors: error LNK2001: unresolved external symbol __imp__PathIsDirectoryA@4 fatal error LNK1120: 1 unresolved externals How can I fix these errors? Is there any other function that I can use? Thank you Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231806
  - 4
    - Can someone explain why Intellisense does not wotk here? - VC6 struct projectStructure { int mgrItem; int buyrItem; int decisionItem; int artItem; int cpyItem; int advItem; int lstItem; int lblItem; int prnItem; int afixItem; int delvrItem; }; typedef struct projectStructure project; //This is in a c source file. When I type: int main() { project july4sale; july4sale.artItem=20 .... } I do not get intellisense at this point july4sale. Nothing happens = after I type the period. I know it works the code seems correct but = intellisense doesn't work. What have I done wrong? Thanks. Visual C++ = 6 SP5 Windows 2000. --=20 George Hester __________________________________ Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231801
  - 5
    - Perhaps a VC++ compiler error Well I'm not sure who's fault is it, me or VC++ compiler!! I wrote a program which works with files in hard disk and it just reads them through "ifstream". This program of mine acts so strange, when I compile it as a release version, it works perfectly but when I compile it as a debug version, it cuases error and abnormal termination!! Can I do anything wrong to make such an error? I'm using VC++ 7.0 in visual studio .Net but without .Net framework. Please help... Mehran Ziadloo Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231798
  - 6
    - C++ Object size Hello all, I want to find out is how much memory is being used by each class (and thus the object) in my application. This includes differentiating between the memory allocated for functions and memory allocated for static data (like arrays, constants etc.) Does anyone know of any utility that will allow me to obtain this information AFTER linking my application with other libraries? I tried to interpret the linker generated MAP file for this, but there seems to be no documentation on MSDN to interpret the keywords in the MAP file. If not another utility, does anyone know how to interpret the MAP file for individual objects/classes? Thanks, Adwait Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231790
  - 7
    - class constructor error Hi, I have a stupid error message from VC++.NET. I did a mistake but i don't see where :( here is my class : class Book { public: int Pages; Book(int Arg_Pages) : Pages(Arg_Pages) { } }; error message is : error C2512: 'Book::Book' : no appropriate default constructor available where is the error ? thx, Maileen Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231789
  - 8
    - LogonUser and ImpersonateLoggedOnUser Hi! I'm developing the setup of an application. It needs to write in registry and extract files on certain directories. The files are extracted using scripting interface (JScript) processed in my setup using odl to define new functions. The setup evaluate if current user have administrator privileges and, if he doesn't have them, it let you introduce username and password and change the current user with LogonUser and ImpersonateLoggedOnUser. This actions are done at the beginning and goes well (I can write in local machine entry of registry), but, when I extract files, the administrator privileges are lost. Does anyone knows how to resolve this? Does the scripting machine have their own privileges or is it multithread or something? Thanks at all Jordi Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231783
  - 9
    - How to catch "integer division by zero" exception In VC7, Division by zero will cause system to throw an exception, I do not konw the exception type, I can only catch it by catch(...){} but, it's no use, because I do not know what the exception really was. Other run time exceptions, such as access violation, have the same problem. I can not find the exception types in the document. Dose some one know the exception type or know how to catch those exceptions? Thanks a lot. Tao Bo Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231780
  - 10
    - Convert String to Variable I have a form which has a series of TextBoxes on it which are named bin0, bin1, bin2, ... On the form I have an array defined called bin[20] which holds integer values and the contents are changed by other code which returns the variable npod. If npod = 1 then I increment bin[1] and then on the form I changed bin1->Text = bin[1].ToString() I started with just a few bin variable an didn't use an array so I performed the update with a case statement and hard coded each TextBox update with the name like above. What I want to do know is create a string which hold the name of the TextBox and use this value to change the text in the box. So my question is how do I code the program, so that once I have a string which holds the TextBox name, it will know that this is the TextBox name and now just a string? Here's an example of what I want to do: Old Code ======= bin1->Text = bin1.ToString(); New Code Which Doesn't Work ====================== String* thebin = String::Concat(S"Bin", npod.ToString()); thebin.ToString()->Text = bin[npod].ToString(); Thanks!!! Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231778
  - 11
    - crash occuring when linking to a DLL I created a DLL and compiled it in release mode and under code generation Multithreaded DLL. My exe that calls my DLL is compiled in debug mode and under code generation Debug Multithreaded DLL in my dll the function i'm calling is string IESettings::GetFTPAddrLAN() { return ftpaddrLAN; } In my exe i'm running this code but i keep getting a messagebox "User breakpoint called from code at 0x77f75a58" and it pulls up assembler code. if (IEobj.GetFTPAddrLAN().empty()) In another part of my code i was getting the same crash due to passing a string to a dll function. Apparently when the function exited it died i believe in the deconstructor of the string. I changed it to a char* and everything worked fine. My question is do i have to change my all my classes in my dll to not have strings at all or is there a way to get strings to work from exes across to dlls? Thank you very much in advance for any help you can provide. Kenji Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231775
  - 12
    - New(nothrow) Problems Hi All, I've been experimenting with the use of (nothrow) with operator new but I can't seem to get it to compile. I've done a bunch of reading and everything I've read seems to indicate that I'm doing it properly but still no luck. If anyone can shed some light on the problem, it would be greatly appreciated. I am using VC++ .Net (7.1.3088) if it helps. The Code ======= #include <new> using std::nothrow; ... int* piMyInt = new(std::nothrow) int; The Compile Error ============= error C2061: syntax error : identifier 'nothrow' Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231774
  - 13
    - Strange COLEDateTime Compile Issues Hi All, I am experiencing a very odd problem compiling a block of code that uses the GetAsDBTIMESTAMP member function from the COLEDateTime class. The compiler is stating that GetAsDBTIMESTAMP is not a member of the COLEDateTime class even though it clearly is (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html /_mfc_coledatetime_class_members.asp). Other member functions from the COLEDateTime class seem to be working correctly (see code below). I've included the relevant portions of code and the actual error below. If anyone out there has any clue what is causing the problem, your assistance would be greatly appreciated. Thanks in advance! The Code ======== COleDateTime theTime; SYSTEMTIME sysTime; DBTIMESTAMP dbTime; theTime.GetAsSystemTime(sysTime); theTime.GetAsDBTIMESTAMP(dbTime); The Error ======== error C2039: 'GetAsDBTIMESTAMP' : is not a member of 'ATL::COleDateTime' Additional Notes ============= The code include the following libraries, as per MS's instructions on the aforementioned page. The include statements are: #include "oledb.h" #include "ATLComTime.h" Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231768
  - 14
    - How does the linker work? Hi, I'm pretty new to C++ and decided it might be a good idea to create a library of reusable code for me. With Visual Studio .NET 2003 I gave my library 4 different configurations Debug Release DebugUnicode ReleaseUnicode (Debug & Release is the default stuff... DebugUnicode & ReleaseUnicode is the same switched to Unicode characters). Building these 4 configs is pretty easy. I named the resulting libs differently and VS can find them in the lib path somewhere. Now I create a new project and want to use the library. I create the same 4 configs for my project and for some reason VS links to the correct lib file. Is there any information on which lib is chosen by the linker and why? Is there any useful documentation out there that explains the process of linking? (So far I only found documentation on many different options that modify that process in some way, but that's pretty meaningless until I get an idea of that process). I'm targetting Win32. Greetings from Bonn, Germany Meikel Weber http://www.meikel.com Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231760
  - 15
    - Linker error C2732 This is a multi-part message in MIME format. ------=_NextPart_000_00E8_01C4553A.0CC97550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi,=20 who can help me on this. what error can cause the linkage error: string.h(130): error C2732: linkage specification contradicts earlier = specification for 'strerror' Thanks Bill ------=_NextPart_000_00E8_01C4553A.0CC97550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hi, </FONT></DIV> <DIV><FONT face=3DArial size=3D2>who can help me on this.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>what error can cause the linkage=20 error:</FONT></DIV> <DIV><FONT face=3DArial size=3D2>string.h(130): error C2732: linkage = specification=20 contradicts earlier specification for 'strerror'</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>Bill</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2> </DIV> <DIV><BR></DIV></FONT> <DIV><FONT face=3DArial size=3D2> </DIV></FONT></BODY></HTML> ------=_NextPart_000_00E8_01C4553A.0CC97550-- Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231753
  - 16
    - Basic security question Hi there. I'm very familiar with the basic Windows security model in general, but can someone set me straight on what account is used to process a (non-COM) call to a remote machine? For instance, if I call any given API function that takes a machine name argument, such as "RegConnectRegistry()" or "OpenSCManager()" among others, what account does this processing actually occur under on that machine? Also, how am I authenticated? Any links would be appreciated as well. Thanks. Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231750
  - 17
    - What do you use with Visual Studio 6.0 I'm interested in putting together a web page with some good tips on what one should use with Visual Studio 6.0. Why? For many different reasons, a lot of developers out there still continue to use 6.0 and I imagine that this will continue for a few more years. So, why not try to share the tricks we've all gathered over the years. Some of this might apply to the later VS.NET systems as well. The page is at: http://www.redwoodsoft.com/~dru/tech/msvc.html There are no ads or pop-ups etc. What I want to capture is: *I'm specifically focused on C++ development* What addins/tools do you use? Does XYZ really work? I'm more of an ATL/WTL developer (no MFC). Here are the things I'm looking into: The problems with the STL have gotten me looking at the different options there. STLPort looks good and I'm looking at that since it gets around the DLL requirement. I'm starting to get some of the Boost libs into my projects. (regex, smart ptrs, etc.) I use it at work, and the smart ptrs work well. What stuff doesn't work well with 6.0? On a rainy day, I'm also going to look at the new free Visual Studio C++ 2003 Toolkit. Can that be made to work inside our old 6.0? I have listed my useful info on the site. (What add-ins, etc.) What tools do you use? Is there a great blog/place on the net for 6.0? <Note: I posted this once yesterday, but I'm cross posting today to get more feedback, hopefully positive :-) > Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231738
  - 18
    - ADO Example Hello.! i do not find any clear example of using ado in VC++. all of them are confuse. i'v looking for one week and nothig clear. i use Access databases Do you have any example of opening database, adding records, deleting records, editing records?? all i could do with ADO and access thanks to all. Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231736
  - 19
    - Set up a member function pointer to another class's public functio Hi all, My appologies for the length of this posting. Problem: I am getting a compiler error "C2440: '=' : cannot convert from 'int (__thiscall CDigitalIO::*)(int)' to 'int (__cdecl *)(int)'" for the line "m_fnRunKOMotor = m_digitalIO.SetFirstKOMotorRun;" in Knockout.cpp. Data: // Knockout.cpp: #include "Knockout.h" #include "DigitalIO.h" extern CDigitalIO m_digitalIO; BOOL TestFunction(BOOL state) { return m_digitalIO.SetFirstKOMotorRun(state); } CKnockout::CKnockout(BOOL firstKO) { if (firstKO) { m_fnRunKOMotor = TestFunction; m_fnRunKOMotor = m_digitalIO.SetFirstKOMotorRun; } else { m_fnRunKOMotor = m_digitalIO.SetSecondKOMotorRun; } } void CKnockout::StartKnockout() { m_fnRunKOMotor(TRUE); //or is it: (*m_fnRunKOMotor)(TRUE); } //End Knockout.cpp // Knockout.h: class CKnockout { public: CKnockout(BOOL firstKO=TRUE); virtual ~CKnockout(); public: void StartKnockout(void); private: BOOL (*m_fnRunKOMotor)(BOOL firstKO); }; //End Knockout.h: Background: I read the posting from Dieter Duwe from 6/7/2004 and sure enough I need to choose the funtion to be called at runtime. I started out by storing the value of firstKO passed into the contstructor into a member variable to be used in an if statement by the function StartKO to determine whether m_digitalIO.SetFirstKOMotorRun or m_digitalIO.SetSecondKOMotorRun is called. This solution clutters up the code too much when this test is applied to the 25 other functions not listed here. Second attempt involves "m_fnRunKOMotor = TestFunction;" which is a small compiler successful step to where I want to go. Thus, I have arrived at the question of how to set up a member function pointer to a public function in an external class? Thanks, Dan Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231734
  - 20
    - std::string Why this doesn't work and what alternative is: std::string doc; doc << "MyText"; Error: C:\Projects\VS\TM.cpp(76) : error C2784: 'class std::basic_ostream<_E,_Tr> &__cdecl std::operator <<(class std::basic_ostream<_E,_Tr> &,const short *)' : could not deduce template argument for 'class std::basic_ostream<_E,_Tr> &' from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231720
  - 21
    - std::ifstream() I've just noticed that ifstrwam.read() function replaces al $0D$0A pairs with $0A. Is there any way to disable this? I'm only trying to read bytes from file into char*. Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231714
  - 22
    - question about unnamed temporary If I have a type T whose only constructor needs an object of type S, how does the compiler parse the line(s): S someS; // ... T(someS); The right statement should be: "T someT(someS)" but I cannot figure why the compiler says "error: T: no default constructor available" here's an example: struct TEST1 { template <typename T> TEST1(T*) { } }; struct TEST2 { double data[5]; TEST2() { TEST1(data); // this should have been: // TEST1 t(data); } }; -- The set of solutions is never empty. Two solutions together form a new problem. -- Mycroft Holmes Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231710
  - 23
    - MFC71/CR9.2 Deployment Hell... Please Help We are trying to deploy an application built using MFC71.DLL VS.NET 2003 (C++) and using Crystal Reports 9.2.2.xxx. The application runs fine when in the development environment but we are unable to deploy it to the Client's machine, the application breaks after viewing the reports. When we install Visual Studio .Net 2003 on the client's machine it works fine. We have tried different sets of merge modules from both the Crystal Report sites and the VS.NET/MFC/ATL merge modules found on the VS.NET CD. Apart from using the following Merge Modules: as well as the merge modules found at the crystal site. Are there any other Merge modules/DLL that we need to consider? The fact that the application runs without error when we install the entire VS.NET seems to suggest that we are missing something Crystal needs and the merge modules are not providing. vc_user_atl71_rtl_x86_---.msm vc_user_crt71_rtl_x86_---.msm vc_user_mfc71_rtl_x86_---.msm vc_user_mfc71_loc_rtl_x86_---.msm vc_user_stl71_rtl_x86_---.msm GDIPlus.msm crnetruntime.msm license.msm mapping.msm reportengine.msm Thank You all in Advance Andy Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231705
  - 24
    - Q: Creating an NT Service in VC++ 6.0 Newbie Alert! (You could tell by the subject, right?) Could someone point me to a good source of basic guidance on how to build an NT Service in VC++ 6.0? People must have been doing it before dotnet came to town, and they must have left records before their civilization crumbled. I'm trying to learn from material in the platform sdk docs. Is it any easier with the ATL COM Wizard, and if so, is there any good instruction on what you do after the Wizard generates the framework code for a service? If it really is pointless to do it any other way than the dotnet way, why? And BTW, can VC++ 6.0 be set up to produce dotnet code? If so, I again need a pointer to some good documentation (or any documentation, for that matter). adTHANKSvance, Chris Gray ----- Please avoid sending me Word or PowerPoint attachments. See http://www.fsf.org/philosophy/no-word-attachments.html Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231703
  - 25
    - About Decorated Names Dear all, I have read a previous post from Simon, and wondering about decorated names... do all static libraries use decorated function names in their export sections? But how does VC++ find out the true name of the original functions? If function name = printf@asdfoiash@.... then when called in a C++ program printf(....) without the decorated part. Thanks. PS: Sorry if any information inaccurate, please correct me if you find anything contradicting. Thanks Thanks Jack Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231702
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  - 1
    - Het zal toch niet zijn wie ik denk dat het is? Is het die Ear Youth weer? Nee, het is Arjen Jongeling! Het is een kwestie van geduld voor heel usenet Hollands lult Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231699
  - 2
    - AMD Developer Forums. Hey All, Just an FYI. If you are developing for AMD64 and looking for resources, AMD just launched some forums for developers. http://devforums.amd.com Thought you guys might want to know. Regards, Java Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231694
  - 3
    - Forcing A Symbol Into A DLL While building a DLL, I need to force a symbol defined in a static library into the linked image presumably using the link option /INCLUDE:symbolname briefly explained in the MS documentation, however, true to the typical MS documentation, no examples are provided that demonstrate how such a symbol name should be constructed, and nothing I have tried works. Can someone explain how a valid symbol name is constructed from C++ function names in a library that link will accept? -- ====================================================================== ====================================================================== == == Bob Riedel == Beckman Coulter, Incorporated == PO Box 8000 W-529 == 200 S Kraemer Blvd == Brea CA 92822-8000 == == Email 1: rariedel@beckman.com == Email 2: rariedel@mindspring.com == == == The opinions expressed are my own, and do not necessarily represent == those of Beckman Coulter, Inc. == ====================================================================== ====================================================================== == == "Effective education is the key to successful democracy." == == "Criticizing the actions of others offers so little risk, and == requires so little effort that it is, without exception, the tool == of the lazy and of the foolish -- who have neither the intelligence == to discover, nor the discipline to pursue, a realistic == alternative." == ====================================================================== ====================================================================== Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231693
  - 4
    - Multiple Language App VC++ Hi! I am looking for possibilities how to write an app with VC++ .net which supports multiple user interface languages. e.g. my app should automatically support the language which is configured within the OS (WINDOWS 2000/XP) I read about language-specific resource-dlls, another question is if/how I could use UNICODE for this task ? any help with this would be greatly appreciated, thanx in advance! best regards, Hans ------------------------------------------------------ My eMail-address has been changed due to spam. eMail-replies can be sent to hpesata@chello.at Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231688
  - 5
    - Avoiding decorated names in C++ DLL export?? hi, I'm writing an application that needs to load plugins provided by users in c++ dlls. These dll's have to follow certain conventions, that is: they must implement two mandatory methods. (each User plugins is derived from a plugin base class that declares these two methods as virtual). So I tried to write a sample plugin for testing that will export a class. Here's what I have in the .h file: extern "C" { class ExamplePlugin : public Plugin { public: __declspec(dllexport) ExamplePlugin(); __declspec(dllexport) ~ExamplePlugin(); __declspec(dllexport) void run(YAIL::YAILDataType<int>& f_input, YAIL::YAILDataType<int>& f_output, std::string f_parms); __declspec(dllexport) bool setMyMember(std::string name, std::string value); private: int m_memberA; char* m_memberB; }; }//end extern "C" The c++ looks like this #include "ExamplePlugin.h" extern "C" __declspec(dllexport) ExamplePlugin::ExamplePlugin() { int m_memberA = 0; char* m_memberB = "YAILExamplePlugin"; } extern "C" __declspec(dllexport) ExamplePlugin::~ExamplePlugin() { } extern "C" __declspec(dllexport) void ExamplePlugin::run(YAIL::YAILDataType<int>& f_input, YAIL::YAILDataType<int>& f_output, std::string f_parms) { } extern "C" __declspec(dllexport) bool ExamplePlugin::setMyMember(std::string name, std::string value) { return true; } Now, I'd like to load the Plugin on my main program using LoadLibrary (which works fine) and then try to see if my mandatory plugin functions (i.e 'run') do exist: MYPROC ProcAdd = (MYPROC) GetProcAddress(hInst, "run"); However, this doesnt work, and I figured out why: When I take a look at the dll in a tool like the dependecy walker, it is showing me decorated names like ?run@YAILExamplePlugin@@UAEXAAV?$YAILDataType@H@YAIL@@0V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z although I use extern "C" calling convention. so the question is: What am I doing wrong ?! Of course, If I do MYPROC ProcAdd = (MYPROC) GetProcAddress(hInst, "?run@YAILExamplePlugin@@UAEXAAV?$YAILDataType@H@YAIL@@0V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z "); it works, but I need to do it in a generic way and just use getProcAddr(hInst, "run"). Any idead anyone what I need to change in the DLL that no decorated names will get generated? And what about the Constructor/Destructor of my class ? Do I need to treat them in a special way when I'd like to export then? Thanks in advance Simon Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231684
  - 6
    - Win32_PhysicalMedia class Is there any way to make this class available on Windows 2000, maybe by installing an update to the .Net framework? Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231677
  - 7
    - Really late binding I use VC++ as a tool not as a primary focus of my professional life. I am trying to think of a way to write an application, e.g., an equation solver, that will allow it to run and accept as input VC valid statement (literally) in a edit box that would then be incorporated in a function and when "the button is pushed" will execute that code. I think there is a straight forward way to do that, but I have my mind locked on path that is not producing results, i.e., it would not compile without that code in place. Thomas -- Three stages of truth for scientists: (1) It's not true. (2) If it is true, it's not very important. (3) We knew it all along. Leo Szilard, (1898-1964, Key figure in the Manhattan Project) Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231676
  - 8
    - HowTo make individual EventLog Categories Sorry Problem solved! > SeverityNames=(Verbose=0x0 Success=0x1 Warning=0x2 Error=0x3) > #snip# > MessageId=1 > Facility=Application > Severity=Success > #snip# I just had to set 'Severity' to 'Verbose' and everything was fine! Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231675
  - 9
    - HowTo make individual EventLog Categories Hi all Can I use a message in my messages DLL as EventLog category name? I set the registry value of 'CategoryMessageFile' to the one of 'EventMessageFile'. The MC.EXE writes a messages.h with all values greater 0x4000000, but event log categories are just WORD(<=0xFFFF)! Any hints welcome Many thanks in advance Joerg M-T ;//BEGIN message.mc MessageIdTypedef=DWORD SeverityNames=(Verbose=0x0 Success=0x1 Warning=0x2 Error=0x3) LanguageNames=(Deutsch=0x407:messages0x407) OutputBase=16 MessageId=1 Facility=Application Severity=Success SymbolicName=EVMSG_CATEGORY_1 Language=Deutsch CatName 1%0 . ;//END message.mc Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231673
  - 10
    - New Message Fro Edit Box Hi; I want to make a new message for the edit box this new message acts as a doubleclick message Can any one help me thanks Monther Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231671
  - 11
    - vc60.pdb problems Hi, can anyone explain to me why the failure to find vc60.pdb is a fatal error in one of my workspaces and only a warning under a different workspace? As far as I can see, this should NEVER be a fatal error. All it means is that you get no debugging information for the library in question. Under one workspace, the error is: CVPACK: fatal error CK1022: cannot open program database c:\... Under the other workspace, the warning is: LNK 4099: PDB "vc60.pdb" was not found with c:\..... or at c:......, linking object as if no debug info. In both cases the pdb file does NOT exist. totally puzzled Russell Thamm Tag: Cannot add fields at runtime to a CDaoRecordSet class Tag: 231654
  - 12
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I solved this once before using VC++ and CDaoRecordSet, but I am looking for
a better solution - even though I have the sinking feeling that what I am
attempting to accomplish is not possible.

Here is the issue (at least a pared down version of it):

My VC++ MFC application has a Microsoft Access file Networks.mdb which
currently has six fields.

The problem arises when I want to add another (or seventh) field.

There is no problem updating the CPP (or class file) for this file -
Networks.mdb. I am able to successfully bind a new variable for the new
field.

But of course this means I can no longer read the old MDB file without
throwing an exception. Which is not unexpected since the number of elements
(6) no longer matches the new class file where m_nFields is now set to 7.

So my question is there a way to open this mismatched MDB file at runtime so
that I can retrieve the records and safe them in the new MDB file. Of course
the added problem is both MDB files have the same name.

TIA.

Michael T.

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Re: Cannot add fields at runtime to a CDaoRecordSet class by Scott

Scott
Sat Jun 19 10:02:47 CDT 2004

Michael_99 wrote:
> I solved this once before using VC++ and CDaoRecordSet, but I am looking for
> a better solution - even though I have the sinking feeling that what I am
> attempting to accomplish is not possible.
>
> Here is the issue (at least a pared down version of it):
>
> My VC++ MFC application has a Microsoft Access file Networks.mdb which
> currently has six fields.
>
> The problem arises when I want to add another (or seventh) field.
>
> There is no problem updating the CPP (or class file) for this file -
> Networks.mdb. I am able to successfully bind a new variable for the new
> field.
>
> But of course this means I can no longer read the old MDB file without
> throwing an exception. Which is not unexpected since the number of elements
> (6) no longer matches the new class file where m_nFields is now set to 7.
>
> So my question is there a way to open this mismatched MDB file at runtime so
> that I can retrieve the records and safe them in the new MDB file. Of course
> the added problem is both MDB files have the same name.
>
> TIA.
>
> Michael T.
>
>
>

See "DAO Recordset: Binding Records Dynamically" in MSDN.

--
Scott McPhillips [VC++ MVP]

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