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- Previous
  - 1
    - Change background colour in SDI I'm using the code below to try and change teh color of an SDI I am using to help me learn at the moment. It changes teh background to the color I want but soon as I type the lines typed are in white. Now I've got to admit I'm way over my depth here, but it is driving me a bit nuts trying to work this out. (Maybe I should have waited a bit longer) If this is the wrong group please direct me to a one more suited. Thanks in advance.... Wayne... CODE: -------- BOOL Cnotepad_testView::OnEraseBkgnd(CDC* pDC) { CBrush brNew(RGB(255,255,204)); //Creates a blue brush CBrush* pOldBrush = (CBrush*)pDC->SelectObject(&brNew); CRect rc; pDC->GetClipBox(rc); // Gets the co-ordinates of the client // area to repaint. pDC->PatBlt(rc.left,rc.top,rc.Width(),rc.Height(),PATCOPY); //pDC->PatBlt(0,0,rc.Width(),rc.Height(),PATCOPY); // Repaints client area with current brush. pDC->SelectObject(pOldBrush); return TRUE; // Prevents the execution of return // CView::OnEraseBkgnd(pDC) statement } Tag: global Tag: 236343
  - 2
    - How to find the exact dll which cause 100% CPU usage? If a process loads a lots of dll & if that process took 100% CPU Usage, is there any way to find out which dll(or module) eating the CPU resource. Is there any thing like CPU time taken by the process for dlls or modules? Thanks & Regards, Muthu Nivas.H Tag: global Tag: 236341
  - 3
    - External API Function I'm in C++, can anyone tell me how to declare external API function ? some short sample code will be very helpful. Thanks in advance. Tag: global Tag: 236335
  - 4
    - #pragma warning has no effect Hello everyone, There is a strange situation with my project now. In the stdafx.h file I have a following #pragma directive: #pragma warning( disable : 4786 ) Since it is in stdafx.h, this directive is global. It worked fine for a long time, but after the latest changes (there are a lot of them actually so I would be reluctant to roll back) I receive dozens of warnings C4786 during compilation. It does not prevent the program from being built but I am still curious - how could it be? And of course it is pretty annoying :( Any ideas? Thank you! Mike Tag: global Tag: 236331
  - 5
    - type case question! Hello, Within a loop which adds data into a list-ctrl; I've used UpdateWinodw function (after m_listctrl.Invalidate() function) to avoid having a fuzy view. The m_listctrl belong to a class called "XCtrlList". The recent class (XCtrlList) is derived from "public CListCtrl , virtual public VCControlBase". The question is how can I type cast m_listctrl ? since compiler complaining "m_listctrl is not a memeber of XCtrlList" Thanks in advance Tag: global Tag: 236325
  - 6
    - reference to static class member from different dlls How can I reference an instance of a static class member accross all translation units? I don't want to pass a reference between dlls. Lib1.dll PROJECT 1 A.h class A { public: A(); ~A(); static CString UserName; // static member }; A.cpp A:A() : Number(_T("")) { } B.h #include A.h class B { public: B(); ~B(); void Login(); } Extern CString _cdecspec(dllexport) A:UserName how do I export this static member ???????????????????????????????? B.cpp CString A::UserName = ""; B::B() { } B::Login() { A::UserName = "michael"; // this works good } ------------------------------------------------------------------ translation units Lib2.dll PROJECT 2 C.h #include A.h class C () { public: C(); ~C(); CString GetStaticUserName(); } C.cpp C::C() { } CString C::GetStaticUserName() { return A:UserName; } error LNK2001: unresolved external symbol "public: static class ATL::CStringT<char,class StrTraitMFC_DLL<char,class ATL::ChTraitsCRT<char> > > CGlobals::UserName" (?gstrREFDB@CGlobals@@2V?$CStringT@DV?$StrTraitMFC_DLL@DV?$ChTraitsCRT@D@ATL @@@@@ATL@@A) Tag: global Tag: 236322
  - 7
    - Deriving from CSplitterWnd Hello all, For some reason, I am unable in VC++ 6.0 (using class wizard) to create a new class derived from CSplitterWnd. CSplitterWnd is simply not presented as a choice for base class. What do I need to do so that class wizard will allow this? Thanks, Dave Tag: global Tag: 236313
  - 8
    - Program crashes with ODBC call Any helpful advice is appreciated I am having a program with ODBC call to insert a record using the ExecuteSQL statement. The code is as follows //----------------------------------------------- CDatabase db; if(db.OpenEx(DSNName,0)== 0) { AfxMessageBox("Error opening database"); return; } try { db.ExecuteSQL("INSERT INTO XYZ VALUES(x1,x2,x3)"); } catch(CDBException *pExc) { AfxMessageBox(pExc->m_StrError); } //------------------------------------------------ The program raises an exception when I am trying to insert a duplicate record. However when I am trying to handle the exception of type CDBException the program crashes in the exception handler or sometime afterward. Sometimes the error message is access violation and sometimes the program just hangs. The program also crashes at some other times. After checking the program thoroughly I've come here. Please give advice. D.Ramesh Tag: global Tag: 236298
  - 9
    - Can't open compiler immediate file What the h*ll is this? Does a...x mean 'athrax'? fatal error C1083: Cannot open compiler intermediate file: 'C:\DOCUME~1 \luckie\LOCALS~1\Temp\a01488ex': Permission denied Sorry for being rude.... really p*ssed off as it last for many hours in my machine now.... Many thanks Jack Tag: global Tag: 236297
  - 10
    - how to create a precompiled head file in VC hi, all: how to create a precompiled head file in VC? Thanks so much for answering. win Tag: global Tag: 236296
  - 11
    - what is forwarding function Hi all: I read a document. it says "Forwarding functions are to be inline.". what is forwarding function. thanks so much for answering. win Tag: global Tag: 236294
  - 12
    - Link time error Linking... msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "class std::basic_ostream <char,struct std::char_traits<char> > & __cdecl std::endl(class std::basic_ostream<char,struct std::char_traits<char> > &)" (? endl@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@ @1@AAV21@@Z) already defined in neoengine_static_debug.lib(core.obj) (more but truncated) Look like there is a conflict between threading models selected in my application... does anyone know which switch I have to set? Thanks Jack Tag: global Tag: 236293
  - 13
    - Complete Tutorial or Sample of MSLU Dear All, I wrote a Unicode Program with VC2003 on WinXP, I want my program to support Win98 also. So, I find document and I know that MSLU can be my solution. But I think it is not so easy for me. Therefore, I am seeking tutorial document to teach me. Does anyone know where can I get it? Thanks. Kevin Tang. Tag: global Tag: 236291
  - 14
    - Size of int (once again, sorry) Hi, sorry about the multiple posting, technical difficulties.... ----- What does exactly the size of the int datatype depends in C++? Recenlty I've heard that it depends on the machine's type, i.e. on 16-bit machines it's 16 bit, on 32-bit machines it's 32 etc. Is this true? Is this true for _all_ C++ compilers? Tag: global Tag: 236288
  - 15
    - typeid problem hi, all: I have a piece code like following: list<Primitive*> m_primitiveList; //declared in head file list<Primitive*>::iterator iter; I have 2 classes inherited from primitive: Ellipse and Rectangle. then I displayed primitive information from this list. for(iter = m_primitiveList.begin(); iter != m_primitiveList.end(); iter++) { cout << "Primitive " << pos++ << ": " << typeid(**iter).name() << endl; } the output of these piece of code as follows: Primitive 1: 7Ellipse Primitive 2: 9Rectangle I don't know why there is the number in the front of the class name? thanks so much for answering. win Tag: global Tag: 236287
  - 16
    - 'foo2' is correct in C++ Hello all, I need to code a program where a function pointer '*fun1' is delivered as input of function 'foo1'. In standard C, 'foo1' is correct but foo2 gives the same result without syntax error. I don't know whether 'foo2' is correct in C++. Thank you for reading through it all and trying to help! Gang-Gyoo JIN ----------------------------------------- #include <stdio.h> #include <math.h> void foo1(float &x, float (*fun)(float x)){ x= x+(*fun)(x); } void foo2(float &x, float fun(float x)){ x= x+fun(x); } float fun1(float x){ return exp(-x); } void main(){ float x1= 0.0, x2= 0.0; for(int j= 0; j < 10; j++) { foo1(x1, fun1); foo2(x2, fun1); x1+= 0.1; x2+= 0.1; printf("%f %f\n",x1,x2); } } Tag: global Tag: 236274
  - 17
    - combo box default value I am using a combo box . It functions except it does not come up with the top value of the list to be inside the visible rectangle area, that area is blank. Can someone tell me how to have the top value appear in the combo box? Tag: global Tag: 236272
  - 18
    - Minimum pane size in a CSplitterWnd Hello all, I am using a CSplitterWnd. I would like to prevent the user from dragging the splitter any closer than a certain distance from the edge of the window. I found that CSplitterWnd::SetRowInfo() and CSplitterWnd::SetColInfo() allow you to set a "minimum" size. However, it's not the case that the user can't drag the splitter past this minimum. It's just that if he does so drag the splitter, the window size will become 0. Is there a way to do what I wish and pysically disallow the splitter to move past a certain point? Thanks, Dave Tag: global Tag: 236263
  - 19
    - problem with link list Hello, I'm using a CList in order to hold structure into a list. When I need to read the very next node (next structure within the list) I see pointer value changes but l I still see same information in previous node or stucture. Any suggestions? Thanks, Smith here is sample: typedef struct pMyStruct{ LONG field0; CString field1; CString field2; CString field3; CString field4; } pMyStruct; POSITION pos = MyList.GetHeadPosition(); while(pos) { MyList.GetNext(pos); AfxMessageBox(pMyStruct->field2); } Tag: global Tag: 236248
  - 20
    - Multiple threads using COM I'm writing an ATL service which creates a COM object that is accessed from two separate threads. I call CoInitialize before I call CreateInstance, when I call CoInitializeEx and pass MULTITHREADED, I am unable to use the COM object although CreateInstance returns S_OK. The problem is when I create the second thread and try to use the shared COM object (using critical sections), it fails, and I donâ??t know how to fix it. How can I have two threads use the COM object? Thanks Mark Tag: global Tag: 236243
  - 21
    - Unsatisfied forward declaration? If I BUILD the code below, all works fine. But if I REBUILD the solution at any time, the following errors are found in the WrapperCOMEXE.idl: 1) error MIDL2337 : unsatisfied forward declaration : IQBEventCallBack [Coclass 'MyWrapper' ] --> This error occurs within the MyWrapper Coclass definition at the line that reads: "[default] interface IQBEventCallBack;" 2) warning MIDL2015 : failed to load tlb in importlib: : sdkevent.dll --> This warning occurs in the importlib statement that reads: "importlib("sdkevent.dll");". Here's the WrapperCOMEXE.idl code: // EventWrapperCOMEXE.idl : IDL source for EventWrapperCOMEXE // // This file will be processed by the MIDL tool to // produce the type library (EventWrapperCOMEXE.tlb) and marshalling code. import "oaidl.idl"; import "ocidl.idl"; [ uuid(EFA60AF9-9F1E-4F2F-9AE2-1DFDCF7721F5), version(1.0), helpstring("EventWrapperCOMEXE 1.0 Type Library") ] library EventWrapperCOMEXELib { importlib("stdole32.tlb"); importlib("stdole2.tlb"); importlib("sdkevent.dll"); [ uuid(3892EADE-FB47-4C18-B296-F91035CE95BF), helpstring("EventWrapperCOM Class") ] coclass EventWrapperCOM { [default] interface IEventWrapperCOM; }; }; Please help! Mervin Williams Tag: global Tag: 236242
  - 22
    - Binary searching Hi, I try to implement the following in C: My application receives a buffer that is of type BYTE* and is filled with both ANSI strings and binary content in between. Now, the problem is, that I want to search for specific patterns in this buffer - _lsearch does this just perfectly well. Now, as the buffer also 'contains' strings (of course not in that format, but by content) I want to do both case sensitive and case insensitive searching on that. As the buffer might contain NULL values I cannot use any typical string function. Any ideas how to do that in a different way? Thanks a lot Peter Tag: global Tag: 236239
  - 23
    - Ternary Search Trees In making a ternary search tree to identify as fast as possible the type of word passed in to the algorithm, for instance sp_help -> 1 (procedures), select -> 2 (keywords), sysobjects -> 3 (system tables), I'm stuck on deciding what type of comparison happens at each node. Has anyone got any suggestions? Do you think for the first level I could compare just the first characters of the word passed in and the word at the 'current' node, or would it be more likely to be a whole word comparison for each node? If it would be a whole word comparison, what form would this take for best performance? Bearing in mind that each word will only ever return the same type, but more than one word will have a certain type (i.e. the type will not be unique, but the word will.) Tag: global Tag: 236236
  - 24
    - sqrt() not working Hi, I have the following code sample: t = sqrt(discrim); where discrim is equal 4. However, instead of returning 2 it will return an incredibly large number or -1.n#IND00000000... Any help would be greatly appreciated. Sincerley, Keith La Force Tag: global Tag: 236235
  - 25
    - who has the EBook <undocumented windows NT>? please send to : sjtuhuang@163.com thanks Tag: global Tag: 236234
- Next
  - 1
    - who has the EBook <windows internals>? please send to : sjtuhuang@163.com I was look for it's pdf for a long time thanks Tag: global Tag: 236233
  - 2
    - Can't determine cause of heap corruption or orphaned lock using cdb Greetings, I posted on this issue before, in a more complex environment, and thought I had resolved what appeared to be an orphaned lock or heap corruption in my application by removing a call to TerminateThread(). You can see the original thread here: http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&c2coff=1&safe=off&threadm=f867e9d7.0407151302.7f0882eb%40posting.google.com&rnum=2&prev=/groups%3Fq%3Dmarc%2Belliott%2Bpush%2Bdirection%26hl%3Den%26lr%3D%26ie%3DUTF-8%26c2coff%3D1%26safe%3Doff%26selm%3Df867e9d7.0407151302.7f0882eb%2540posting.google.com%26rnum%3D2 However, I am still experiencing this issue. When I launch my app (particularly one which does a high number of calls to CreateProcess() and creates runner threads for stdin/stdout/stderr the process hangs or (more rarely) faults on closing Invalid Handle or something similar. Sometimes I will get this problem after a single call to CreateProcess(). I've been through the process spawning code a million times, but I don't see anything untoward. I've enabled full page heap and the lock verification layer, and although app verifier throws exceptions in places that appear to be during access to invalid handles, etc, I don't see anything otherwise meaningful and there are times where the process still hangs and AppVerifier doesn't seem to notice anything's wrong at all. Question: What can I do to better isolate the problem using these tools? I am able to repro on Win2K3, so I have access to the latest AppVerifier switches, but am at a loss as to what usefulness I can get out of them at this point. Further details: This issue only appears on SMP boxes, and I have only had success repro'ing it when multiple instances of the process are running simultaenously. Whether that indicates some resource contention or simply increases the statistical likelihood of the error appearing is unclear. Any suggestions from the cdb/windbg masters are heartily welcomed! Regards, Marc Tag: global Tag: 236231
  - 3
    - Which memory allocator to use? Hello all, needing to allocate a large number of buffers (let's say 20.000 buffers of sizes between 8 and 200 bytes), which method would you recommend: 1. malloc (slow from my tests) 2. dlmalloc (Doug Lea's malloc replacement) 3. other Since there are so many ways to alloc buffers, which is the one you would recommend in terms of performance (e.g. GlobalAlloc, LocalAlloc, IMalloc, malloc etc.) If your solution is a custom memory allocator, I need it to work on Win32 (e.g. Win9x included). I've done tests with dlmalloc and it seems pretty fast. Perhaps an experience/advice of using it in the real-world would help. Thanks. Regards, George Ionescu Tag: global Tag: 236229
  - 4
    - Error parser for running make I have an 'Extern Tool' that I use to run a gcc makefile from inside of MSDEV 7.0 I am able to click on an error line and have the offending file brought up in the editor, but I would like to be able to show the errors in red. Is there a way to modify this in msdev? Tag: global Tag: 236228
  - 5
    - Toolbar button Text is not appearing I have am MDI application I added a CToolBar object . I addd buttons to it . but the SetButtonText function does not place the caption on that buttons.. the code is below m_wndToolBar.ModifyStyle(0, TBSTYLE_FLAT | TBSTYLE_TRANSPARENT); m_wndToolBar.SetButtons(NULL, 9); m_wndToolBar.SetButtonInfo(0, ID_TOOLBAR_TXTCHAT , TBSTYLE_BUTTON, 0); m_wndToolBar.SetButtonText(0, LPCSTR("Test")); Regards Tony Tag: global Tag: 236226
  - 6
    - __event fail when in precompiled header In native C++ here is stdafx.h #pragma once #include <iostream> #include <tchar.h> [ event_source( native, optimize = speed, decorate = false ) ] class CSourceToto { public: __event void MyEvent(int nValue); }; and main.cpp using precompiled header #include "stdafx.h" [event_source(native)] class CSource { public: __event void MyEvent(int nValue); }; int _tmain(int argc, _TCHAR* argv[]) { return 0; } I got these errors ! main.cpp(11) : error C2011: '__EventingCriticalSectionStub' : 'struct' type redefinition main.cpp(11) : see declaration of '__EventingCriticalSectionStub' main.cpp(11) : error C2953: '__eventingGetAddr' : template class has already been defined etc... Anyone know how to solve this ? Tag: global Tag: 236225
  - 7
    - accesing low level routines disk with vc++2005 express Hello! I've done a small application in tasm, but I would like to migrate it to VC++ 2005. I've got a problem, could I read/write in the floppy disk using BIOS routines? And how? I think something like: asm { mov ax,?? int ?? bios function } Could I do that with vc++ 2005 express ed.? Thanks. Tag: global Tag: 236221
  - 8
    - array of struct Hi, how can I create a array of struct? Thanks in advance, JSmith Tag: global Tag: 236216
  - 9
    - array of struct Hello, How can I create an array of structure ? the struct will be holding the results of a query. any link or example ? Thanks, Smith Tag: global Tag: 236215
  - 10
    - SetTimer / static pointer Hi All, Two questions.. one about SetTimer and the other one about a static pointer.... I have a problem w/ the CWnd::SetTimer function. Maybe someone can give me an insight. This question regards a Windows CE [3.0] device: Let's say I have a timer running in my main dialog window started by "SetTimer(ID, .. etc)" .. then, I display modally a new window on top of the main one. In this one, I start a new timer by the same function "SetTimer(ID, ...") where the ID of this timer in this newly displayed window is different than the ID from the main window (even though the documentation says that the IDs can be the same given that these timers are ran in two different windows... but just to make sure.) What happens is that sometimes the timer from the second window quits working (no WM_TIMER message is generated for that window) IF the timeout values of the two timers are the same. If they are different by even 2ms, the problem never occurs but if they are the same, the problem can almost always be reproduced. The weird thing is that if I start a 3rd timer, on a 3rd window displayed modally, then the 2nd timer may start firing as well (this 3rd timer would have a different timeout value than the other two), but as soon as I kill this third timer, then the 2nd timer dies again...Note that the SetTimer functions return success in all cases [for all 3 timers.]... Has anyone experienced a problem like this ? The second questions is this: In a certain class, in the header file I have: static CSomeObject* c_pTheObject(); Implemented as: CSomeObject* TheClass::c_pTheObject() { static CSomeObject* pKeyPad = new CSomeObject; return pKeyPad; } This is really simulating a "static" object which I want to make sure it is actually created before I use it so whenever I need it (maybe in different translation unit) I do something like: TheClass::c_pTheObject()->SomeMethod(); this way, if the object is not already created, then it is created before being used... if it is, it just returns a pointer to the already existing object so everything is ok... When deallocating it, I do something like: delete TheClass::c_pTheObject(); Is this correct ? I am thinking that using c_pTheObject() will return me a pointer to the already existing object (as described above) and the delete statement will delete the object that the pointer points to... I tested this approach by checking if the destructor of the CSomeObject is being called when calling the delete TheClass::c_pTheObject() and indeed it is called... Thanks for any tips/suggestions. Tag: global Tag: 236211
  - 11
    - HOWTO?: Function Pointer to Instance Member Hello, I need to form a function pointer to a function in an instance of a class. The docs say that the way to call a member function from outside the class is: void (A::*p4)() = &A::f; But doesn't that require the function to be Static? I would like to be able to use an instance function. Further, is it possible to make the function pointer so that its declaration does not have to specify the class of the function I wish to call - can it specify only the return type and parameter list? I know this is complicated, thank you for reading through it all and trying to help! Thanks, Rich PS. The reason I want to make a pointer to an instance member is so that I can call this function in a variety of different objects, generically. Tag: global Tag: 236204
  - 12
    - Errors rebuilding solution I am running into errors when I attempt to rebuild a project. To test, download and unzip this zip file (download DotNetEvents.zip to your PC from this link: https://developer.intuit.com/QuickBooksSDK/Resources/Samples.asp?id=96#DotNetEvents%20(VB.NET)%20(qbfc)%20(desktop) to your machine (say to your Desktop) and add the solution file to VS.NET 2003. If you BUILD the solution, all works fine. But if you REBUILD the solution at any time, the following errors are found in the WrapperCOMEXE.idl: 1) error MIDL2337 : unsatisfied forward declaration : IQBEventCallBack [Coclass 'MyWrapper' ] --> This error occurs within the MyWrapper Coclass definition at the line that reads: "[default] interface IQBEventCallBack;" 2) warning MIDL2015 : failed to load tlb in importlib: : sdkevent.dll --> This warning occurs in the importlib statement that reads: "importlib("sdkevent.dll");". Any help would be greatly appreciated! Thanks, Mervin Williams Tag: global Tag: 236199
  - 13
    - Problem returning string from DLL function I have a function in a DLL which returns a std::string - When I call it from my main program I'm getting exceptions after the call to the function saying that the heap is broken. I seem to remember a long time ago reading that there were problems sharing STL objects between a main program and a DLL but I though this had been fixed in vc.net 2003. Is it likely that having a std::string as the return type of my function in the DLL is the problem, and if so is there anything I can do to make it work? Tag: global Tag: 236186
  - 14
    - newbee: trouble w/ try{} catch{} There is a tool that we use here at work. The guy that wrote it has since quit and I was asked if I would like to take it over (I'm learning to program and the co. supports that) with that said, the code is really messy and rather than fix ir "correct" i have started to design a new version from the ground up, I am still responsible for keeping the old one running until I roll out the new one. OK, so I have a crash that happens randomly and I have asked the people here to send me their logs when they crash, I have narrowed it down to one operation and I don't understand why it's happening. I just thought I could wrap it in a try/catch and handle it from there. Here is the code: inline byte GetRecordTypeId(void* pV) { if(pV) { try { return *(byte*)pV; } catch(char* e) { theLog.WriteError(e, __FILE__, __LINE__); } } return kRecordTypeUndefined; } However, this appears to do nothing. It still crashes just the same as if there was no try block. From what I understand, the above code should have worked fine. What am I missing? For testing purpose I forced a crash in the code by setting the void* to an int (pV = (void*)someInt;) Any help or suggestions would be great. Thanks! Tag: global Tag: 236167
  - 15
    - Pixel location utility needed Hello all, Can anybody point me to a utility that will tell me the (x, y) coordinates of the pixel pointed to by my mouse? Thanks, Dave Tag: global Tag: 236166
  - 16
    - Visual C++ 6 and API Hello. Im from Chile and speak a little english, my question is how insert a progressbar in an item of list-view using only API of Windows (CreateWindowEx()...etc.). Show me the source code or link to the page with the source code. Thank you. PD: I post this question in the LATAM Newsgroup, but without answers Tag: global Tag: 236163
  - 17
    - method hiding This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C4A53A.DFC9D850 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The 4th line in my main method in the code below does not compile. Isn't there a way to overload a base class method in the derived class = in C++? I know C#, java and VB.NET allow this. TIA Sankar Nemani class B { public: void foo(){} =20 }; class D: public B { public: void foo(int i){} }; void main() { B *b =3D new B(); D *d =3D new D(); b->foo(); d->foo(); //does not compile } ------=_NextPart_000_0008_01C4A53A.DFC9D850 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 6.00.3790.186" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>The 4th line in my main method in the = code below=20 does not compile.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Isn't there a way to overload a base = class method=20 in the derived class in C++?</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I know C#, java and VB.NET allow=20 this.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>TIA</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Sankar Nemani</FONT></DIV> <DIV><FONT face=3DArial size=3D2>class B<BR>{<BR>public:<BR> void=20 foo(){}<BR> <BR>};</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>class D: public = B<BR>{<BR>public:<BR> void=20 foo(int i){}<BR>};</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>void main()<BR>{<BR> B *b =3D new=20 B();<BR> D *d =3D new=20 D();<BR> b->foo();<BR> <STRONG>d->foo(); //does not=20 compile<BR></STRONG>}</FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C4A53A.DFC9D850-- Tag: global Tag: 236159
  - 18
    - forcing malloc to use high addresses Is there a way to force the malloc in VC++ 2003 to use addresses above 0x12000000 for virtual memory ? You dont want to know why. It has to do with fortran common blocks. Thanks, Lynn Tag: global Tag: 236153
  - 19
    - integer pointer values..convert to char This is a multi-part message in MIME format. ------=_NextPart_000_0345_01C4A597.F923BC50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable i have a doubt.. if i have a integer pointer of 2 bytes and i want to fetch values of 1 = byte 1 byte pointer incrementation is=20 possible??? ie operating like the character pointer?? -- ------=_NextPart_000_0345_01C4A597.F923BC50 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 size=3D2>i have a doubt..</FONT></DIV> <DIV><FONT size=3D2>if i have a integer pointer of 2 bytes and i want to = fetch=20 values of 1 byte 1 byte pointer incrementation is </FONT></DIV> <DIV><FONT size=3D2>possible???</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>ie operating like the character = pointer??</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2><BR>--  = </FONT></DIV></BODY></HTML> ------=_NextPart_000_0345_01C4A597.F923BC50-- Tag: global Tag: 236150
  - 20
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  - 21
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  - 22
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  - 23
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  - 24
    - how to export this function? hi, all I wrote a dll, but , it does not work correctly. I created a Regular DLL using shared MFC DLL in vc6 and exprots one function // in mydll.cpp CString __cdecl GetStringCode(CString str1, CString str2); CString __cdecl GetStringCode(CString str1, CString str2) { //code..... CString strRet = ........ return strRet; } // in mydll.def file EXPORTS ; Explicit exports can go here GetStringCode @1 // ----- Use it in another Dialog Based app typedef CString (FAR __cdecl *PGetStringCode)(CString str1,CString str2); HMODULE hLibrary; hLibrary = LoadLibrary("win98type.dll"); if(hLibrary != NULL) { PGetStringCode pGetSC = (PGetStringCode)GetProcAddress(hLibrary, "GetStringCode"); if(pGetSC != NULL) { CString str = pGetSC("1","2"); //Here, I debugged into the mydll, int function GetStringCode(str1, str2), the str1="2" , str2="", this is not right. FreeLibrary(hLibrary); } } So how to export this function? What is wrong here? Thanks Tag: global Tag: 236124
  - 25
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I have a control in class A. How can I make it accessible in Class B?

thanks

Re: global by James

James
Fri Oct 01 15:33:02 CDT 2004

"JSmith" <jsmithmitra@yahoo.com> wrote in message
news:u29exf%23pEHA.1152@TK2MSFTNGP11.phx.gbl...
> I have a control in class A. How can I make it accessible in Class B?

There are many ways. Most are bad design. Choosing among the rest
would require know more about how you plan on using the control.

--
Truth,
James Curran
Home: www.noveltheory.com Work: www.njtheater.com
Blog: www.honestillusion.com Day Job: www.partsearch.com
(note new day job!)

Re: global by JSmith

JSmith
Fri Oct 01 19:22:16 CDT 2004

Ok, there is link list defined and populated into a CPP file but now I need
to have access to that link list thru another CPP file to get a pointer to
it. How can I make this happen?
I tried some basic commands which works for ansi c++ but MFC doesn't accept
them.

Any suggestions on this?
Thanks in advnace

"James Curran" <JamesCurran@mvps.org> wrote in message
news:uz9F0X$pEHA.3868@TK2MSFTNGP15.phx.gbl...
> "JSmith" <jsmithmitra@yahoo.com> wrote in message
> news:u29exf%23pEHA.1152@TK2MSFTNGP11.phx.gbl...
> > I have a control in class A. How can I make it accessible in Class B?
>
> There are many ways. Most are bad design. Choosing among the rest
> would require know more about how you plan on using the control.
>
> --
> Truth,
> James Curran
> Home: www.noveltheory.com Work: www.njtheater.com
> Blog: www.honestillusion.com Day Job: www.partsearch.com
> (note new day job!)
>
>

Re: global by James

James
Sun Oct 03 09:59:18 CDT 2004

JSmith wrote:
> Ok, there is link list defined and populated into a CPP file but now
> I need to have access to that link list thru another CPP file to get
> a pointer to it. How can I make this happen?

What is class B planning on doing with the list? Does it need access to
the list itself or just to the elements of it.

> I tried some basic commands which works for ansi c++ but MFC doesn't
> accept them.

What have you tried?
--
Truth,
James Curran [erstwhile-MVP]
Home: www.noveltheory.com Work: www.njtheater.com
Blog: www.honestillusion.com Day Job: www.partsearch.com