2002 Vs. 2003

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- Previous
  - 1
    - reference to pointer void foo( std::string& rs ) { // There is no way to obtain the real address of object, referenced by rs. // Isn't it? } Tag: 2002 Vs. 2003 Tag: 222104
  - 2
    - Template member functions syntax Hi. Does anybody can help me understand the syntax for defining members templates out of classes (please see below an example)? Thanks Regards. Fabio *************************************************** The following compiles and runs fine. template <int N> struct X { template <int M> int foo( int z ) { return M+N+z; }; }; int testTemplate( int z ) { X<4> x; return x.foo<5>( z); } However, I would like to define the body of foo outside the class declaration. Do you know what is the syntax to do that? I have tried many different possibilities, but the compiler (VC7) doesn't like any of them. For example, this doesn't work... template <int N> struct X { template <int M> int foo( int z );// { return M+N+z; }; }; template <int N> template <int M> int X<N>::foo<M>( int z ) { return M*N*z; } int __cdecl main(int argc, char* argv[]) { int y = X<4>().foo<5>( 10); return y; } Tag: 2002 Vs. 2003 Tag: 222096
  - 3
    - Cannot create a key uder HKEY_USERS ! Hi, I want to make a new key under HKEY_USERS. I use RegCreateKeyEx(HKEY_USERS, "Test\\SOFTWARE", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKey, &dw); However the function always returns - "The parameter is incorrect." . If I change HKEY_USERS to HKEY_CURRENT_USER the key gets created. I can not add a new key under HKEY_USERS even when I use Regedit.exe . I am testing on a Windows XP professional PC . Can anyone tell me what is wrong? Thanks! Tag: 2002 Vs. 2003 Tag: 222074
  - 4
    - name of variable Hi all, How can i assing the name of a CString variable to another CString? I mean, CString xxx;yyy; xxx=NameOfVar(yyy); is there any function or something similar to do this. Thanks... Ilter Suat Tag: 2002 Vs. 2003 Tag: 222072
  - 5
    - Is Decimal a basic data type in VB6? I wanna declare a variable with the type of Decimal. However, when I typed the key word As and had the IntelliSense listbox popped up, I could not find the Decimal item. Does this means that Decimal is unavailable in VB6, or it is defined in another Library that I have to get it included into my project? Any reply would be appreciated! -- Best regards, Laser Lu Tag: 2002 Vs. 2003 Tag: 222069
  - 6
    - CFile class newbie question - file handle invalid? Hi I've got the following code for the constructor of a class that I've derived from CFile. It is in a project that I've created using ATL COM AppWizard, with MFC support. So it's using ATL *and* MFC. However when I try to write to the file, it asserts in the first line of the CFile::Write class, on the line: ASSERT (m_hFile != hFileNull) so I decided to put this test in my own class so I could check for it - my code is as follows: CBMPFileInternal::CBMPFileInternal(LPCTSTR lpszFilename) { try { CFile::CFile(lpszFilename, CFile::modeCreate | CFile::modeWrite | CFile::typeBinary); if(m_hFile != hFileNull) OpenedOK = true; else OpenedOK = false; //<-this occurs. } catch(CFileException e) { afxDump << "File could not be opened " << e.m_cause << "\n"; OpenedOK = false; } } However I checked in windows explorer and the file IS being created. How can I get the file handle to be non- null, and thus enable writing to the file? thanks Tag: 2002 Vs. 2003 Tag: 222055
  - 7
    - very small bug in VC 7.1 Hi, I found a small bug in the VC7.1 compiler, the code is not valid, but the compiler hit ICE. Here is a small example #include <iostream> #include <map> struct foo { virtual int someVirtualFunc (int n) { return n; } }; template <class A, int (A::*func) (int)> struct bar : public A { bar () { this->*func = &bar<A,func>::anotherVirtualFunc; } virtual int anotherVirtualFunc (int n) { return n; } }; int main () { bar <foo, &foo::someVirtualFunc> aa; return 0; } Lucas/ Tag: 2002 Vs. 2003 Tag: 222048
  - 8
    - Inheriting from a DLL Greetings, I'm using VC 5 SP3 and I'm attempting to inherit a class from a DLL and call it's member function from an application (which links to the DLL). Base Class (inside of DLL) | Child Class (inside of application) The class within the DLL has been exported using: __declspec(dllexport) The application imports the class using: __declspec(dllimport) The DLL contains one member function: void CDllTest::SayHello() { printf("Hello C++!"); } All I want to do is call CDllTest::SayHello() from a Child class. However, the compiler error I receive is: DllTestApp\CDllTestChild.h(27) : error C2065: 'SayHello' : undeclared identifier I think this can be done but the syntax/mechanism to achieve it has eluded me. The source code is listed below. Can someone help? Here's the source for the DLL: // "DllTest.h" class __declspec(dllexport) CDllTest { public: CDllTest(){} ~CDllTest(){} public: void SayHello(); }; // DllTest.cpp #include "stdafx.h" #include "DllTest.h" BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) { switch (ul_reason_for_call) { case DLL_PROCESS_ATTACH: case DLL_THREAD_ATTACH: case DLL_THREAD_DETACH: case DLL_PROCESS_DETACH: break; } return TRUE; } void CDllTest::SayHello() { printf("Hello C++!"); } Here's the code for the child class that wants to inherit CDllTest. // CDllTestChild.h #include "DllTest.h" class __declspec(dllimport) CDLLTest {}; class CDllTestChild:public CDLLTest { public: void SayHelloChild() { SayHello(); // ** error C2065 ** printf( "Hello C++ Child!\n" ); } }; // here's the code for the application // DllTestApp.cpp #include "stdafx.h" #include "CDllTestChild.h" int main(int argc, char* argv[]) { CDllTestChild dtChild; dtChild.SayHelloChild(); return 0; } Thank you, Roy Tag: 2002 Vs. 2003 Tag: 222047
  - 9
    - Get the occurrence of a substring. Hi, Does anybody know if C/C++ provides any functions to get the occurrence of a substring within a string? For example, Substring: "abc" Original String: "231abc643abc" Return: 2 Thanks. Leo Tag: 2002 Vs. 2003 Tag: 222042
  - 10
    - lists struct Obj { /*code omitted*/ Obj* pNextOne; } struct DObj : public Obj { int sth; //or whatever } (: Im building a list of Obj (so that each has a pointer to next one), but i'd like some of them to be DObj, everything is fine, but when i delete the list sth goes wrong, when im deleting any DObj. Could someone give me a hint how to delete such a list ???? thanks Tag: 2002 Vs. 2003 Tag: 222040
  - 11
    - Trouble in warp a function in COM dll I have a class to wrap in COM dll. There is a c++ function declare void Draw(HDC hdc, int x, int y, int w, int h) I warp it in IDL as HRESULT Draw([in] int** hdc, [in] int offx, [in] int offy, [in] int width, [in] int height); STDMETHODIMP CImg::Draw(int** hdc, int offx, int offy, int width, int height) { AFX_MANAGE_STATE(AfxGetStaticModuleState()); image->Draw((HDC)(hdc), offx, offy, width, height); return S_OK; } in this way, the hdc parameter will be IntPtr in C# so in c# code look like IntPtr hDC = e.Graphics.GetHdc(); if (img != null) img.Draw(hDC, 0, 0, 100, 100); e.Graphics.ReleaseHdc(hDC); sounds very pretty code. but when i turn to VB6, it doesn't work. I write the code Private Sub Form_Paint() Call g.Draw(hDC, 0, 0, 100, 100) End Sub but compiler complain it use some type that vb can't recognize What's the better way to make this interface be used by c#, vb6, dephi smoothly? any idea? Tag: 2002 Vs. 2003 Tag: 222036
  - 12
    - Unable to uninstall VC++ 1.52 I mistakenly installed VC++ 1.52 on Windows 2000 advanced server where I have already installed .NET 1.1. Now I am unable to uninstall VC++ 1.52. The program does not show up in the 'Add/Remove programs' list of Control Panel and there is no uninstall directory in the program' directory of the VC++ 1.52. I ran visual studio 6.0 setup program and clicked on 'Remove All'. The program ran without error but Visual C++ 1.52 is still there. I then re-ran the setup program for visual studio 6.0 to install the VC++ 6.0. The program ran again without any errors. But on the programs menu I see only one VC++ item and when I click on this item I see only VC++ 1.52. Could someone please help me in uninstalling VC++ 1.52. Thank you, Niran Tag: 2002 Vs. 2003 Tag: 222033
  - 13
    - Triple Des Class Hi all Where on the net can I get a copy of a TDES C++ class, preferably just TDES and in code form. Not the HUGE cryptographic libraries that are floating about.. All help Greatly appreciated. Many Thanks T Tag: 2002 Vs. 2003 Tag: 222031
  - 14
    - Download of DDK Hi, maybe this is the wrong newsgroup for my posting, but I couldnt find any better, so sorry in advance. I am searching The MS Windows XP SP1 DDK, which is on the MS page only available by ordering a CD. I remember, that in former times I could download the DDK from the internet. Is that not possible any longer? Thanks in advance Julia Tag: 2002 Vs. 2003 Tag: 222022
  - 15
    - The thing after the DOS Stub I was asking me the question... what is that unusefull thing after the Dos Stub of all exes generated with the Microsoft linker... now i'm asking that question to you.... What is it ? it's just before the PE.... it take some space.... so I can't get my exe generated with that linker smaller than 396 bytes... I must edit it by hand... There is always the string "Rich" and some other constant... but the rest is random...... any one knows what it is? and maybe... how to get it off ? Tag: 2002 Vs. 2003 Tag: 222015
  - 16
    - Create a bitmap from a CString I need to be able to create a bitmap from a user input string. To make matters more complicated I need the bitmap to be created font specific. Can someone please give me some guidance as to where to start researching this? thanks Tag: 2002 Vs. 2003 Tag: 221997
  - 17
    - Multiple CDynLinkLibrary in DllMain proc and other location Hi, I've got some MFC extensions DLL from which I have removed the multiple resources. I localize the resources into separated resources-only DLL because of the difficulty to deal with the language resources load order. The problem is that I must ensure a backward compatibility with the old clients EXE. Indeed these assume to the DLL find out itself its resources; i.e a default behaviour. I code this like (from my extension dll): AFX_EXTENSION_MODULE extDLL; DllMain(...) { .... AfxInitExtensionModule(extDLL); extDLL.hResource = AfxLoadLibrary( default resource); new CDynLinkLibrary(extDLL); .... } Now for the new clients, I want to supply an exported function InitMyDLLResources() where I would to replace the default loaded library with a new convenient one. I code like (from my extension dll): InitMyDLLResources( the language) { AfxTermExtensionModule(); AfxFreeLibrary(extDLL.hResource); AfxInitEXtensionModule(extDLL); extDLL.hResource = AfxLoadLibrary( convenient resource); new CDynLinkLibrary(extDLL); } Invocation from old clients EXE: nothing. Invocation from new clients EXE: CWinApp::InitInstance(){...InitMyDLLResources(the language);...} This stuff seems to be functionnal but I don't really have a wide kwnowledge about the AFX_EXTENSION_MODULE and the CDynLinkLibray so I would like to know if all of this is not savage. My doubt carries on the safe manner or not to proceed like this ; quality of design is another problem :-) (but in a first step, safety is more important for me) Thanks you very much for your advise Manfred Ehrhart Tag: 2002 Vs. 2003 Tag: 221996
  - 18
    - How to find EOF in buffer received from socket? Hi, I use recv() to get data buffer and write to file. The other side uses TransmitFile() to send data. How should I decide in recv() if all the sent data have been received? Can I search for EOF at the end of each received buffer? I tried if(fBuf[nRecv-1] == EOF) (and fBuf[nRecv]) but it didn't work. The sample send and receive code is as following: ////send data: -------------- .... hFile = CreateFileA( fname, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, 0 ); .... TransmitFile( socket, hFile, 0, 0, NULL, NULL, 0 ); .... ////receive data: ... hFile = CreateFileA( fname, GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_FLAG_SEQUENTIAL_SCAN, 0 ); ... while(true)//find better way to exit the loop? { TCHAR fBuf[1024]; nRecv = recv(sock, (LPSTR)fBuf, sizeof(fBuf), 0); // if(fBuf[nRecv-1] == EOF) break; -- not working .... WriteFile(hFile, fBuf, nRecv, &dwWritten, NULL); } .... I used to use send file size first, and use the size to exit the while() loop. But I need to process the received buffer after file size, since that will be the file data, and that processing affects some of the binary files' format, so they can't be opened in after transfering. It will be 'cleaner' if I can avoid sending/receiving file size and exit the while() loop by detecting EOF, or other ways to check the complete of receive. Thanks for any input, Peter Tag: 2002 Vs. 2003 Tag: 221991
  - 19
    - Multibyte string buffer needed. Hi, I am using GetDateFormat with 0 at it's last parameter to obtain the len (in TCHARs) needed for the buffer. Having this, how can I determine how many bytes will be needed for my buffer ? ---- Thanks, Rafael Pivato Tag: 2002 Vs. 2003 Tag: 221990
  - 20
    - Please help me!!! Here is the errors I am getting when I compile the following compiler driver "compTest.cpp: --------------------Configuration: compTest - Win32 Debug-------------------- Linking... compTest.obj : error LNK2001: unresolved external symbol "double __cdecl Expression(bool)" (?Expression@@YAN_N@Z) compTest.obj : error LNK2001: unresolved external symbol "enum Token currentToken" (?currentToken@@3W4Token@@A) compTest.obj : error LNK2001: unresolved external symbol "enum Token __cdecl GetToken(void)" (?GetToken@@YA?AW4Token@@XZ) compTest.obj : error LNK2001: unresolved external symbol "double & __cdecl Symbol(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?Symbol@@YAAANV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ @Z) Debug/compTest.exe : fatal error LNK1120: 4 unresolved externals Error executing link.exe. compTest.exe - 5 error(s), 0 warning(s) ----------------------------------------------------- Here is the source code for the compTest.cpp: //compTest.cpp #include "symboltable.h" #include "scanner.h" #include "parser.h" #include <iostream> using std::cin; using std::cout; int main() { Symbol("pi") = 3.1415926535897932385; Symbol("e") = 2.7182818284590452354; while(cin) { GetToken(); if(currentToken == END) break; if(currentToken == PRINT) continue; cout << Expression(false) << '\n'; } return 0; } ------------------------------------------------------ Can someone take a look at it and tell me what am I doing wrong. Thanks, Felix Tag: 2002 Vs. 2003 Tag: 221985
  - 21
    - SYSTEMTIME to time_t Hello. I wonder if you could tell me if trying to convert : SYSTEMTIME to time_t is a bad idea ? heres what i did: void ST2T(SYSTEMTIME &st, time_t &t) { time_t now; time(&now); tm local = *localtime(&now); local.tm_year = st.wYear-1900; local.tm_mon = st.wMonth-1; local.tm_mday = st.wDay; local.tm_wday = st.wDayOfWeek; local.tm_hour = st.wHour; local.tm_min = st.wMinute; local.tm_sec = st.wSecond; t = mktime(&local); } thanks Tag: 2002 Vs. 2003 Tag: 221982
  - 22
    - IInternetProtocol Start Method not working correctly Hello, I've been searching and searching and found nothing to help me out. Here's my situation: I need to capture URL Requests (clicks or address bar entries) and if it matches a specific URL like "http://somedomain.com/blorg.exe" I want to be able to intercept that and tell IE i'll take care of it myself, OR, if it does not pass my criteria, let IE handle the click. I DO NOT want to register my own protocol like mark://somedomain.com/.... I need to be able to look at the whole URL This is what I've done so far: I have created a namespacehandler in the HKCR area so my DLL gets called for any URL's requested in IE. My DLL gets called and the start() gets called, but if I don't want the URL, I'm returning INET_E_USE_DEFAULT_PROTOCOLHANDLER. This causes IE to crash. But if I return S_FALSE, IE stops navigation and stays where its at (what I want when I want to handle the URL myself). Thanks in advance.. Tag: 2002 Vs. 2003 Tag: 221981
  - 23
    - fatal error LNK1169: one or more multiply defined symbols found Hi, I have a C++ project and a C static libarary. When I call the functions in this C library from the C++ project I get these errors. I have used the #ifdef __cplusplus extern "C" { #include "vlib\xyz.h" } } #endif user error LNK2005: ___CppXcptFilter already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: ___xc_a already defined in MSVCRT.lib(cinitexe.obj) user error LNK2005: ___xc_z already defined in MSVCRT.lib(cinitexe.obj) user error LNK2005: ___xi_a already defined in MSVCRT.lib(cinitexe.obj) user error LNK2005: ___xi_z already defined in MSVCRT.lib(cinitexe.obj) user error LNK2005: __isctype already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _atoi already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _exit already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _fflush already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _free already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _malloc already defined in MSVCRT.lib(MSVCR71.dll) user error LNK2005: _realloc already defined in MSVCRT.lib(MSVCR71.dll) user fatal error LNK1169: one or more multiply defined symbols found I tried using NODEFAULTLIB/libcmt.lib but no help! What are the settings? I am using VS.NET 2003 to build the C++ project. TIA. mp Tag: 2002 Vs. 2003 Tag: 221978
  - 24
    - passing struct to class I'm trying to pass a struct object to a class. This is complete code. error C2143: syntax error : missing ',' before '&' error C2065: 'rr' : undeclared identifier // ClassTest.cpp #include "stdafx.h" #include <iostream> #include <cstdlib> #include "myclass.h" using namespace std; struct Date { int D; int M; int Y; }; Date dd; int main(int argc, char *argv[]) { dd.D = 1; dd.M = 2; dd.Y = 3; cShow sh; sh.show(dd); system("PAUSE"); return 0; } // MyClass.h #pragma once class MyClass { public: MyClass(void); ~MyClass(void); bool show(const Date & rr); }; // MyClass.cpp #include "stdafx.h" #include <iostream> #include <cstdlib> #include "myclass.h" using namespace std; MyClass::MyClass(){} MyClass::~MyClass(){}; bool MyClass::show(const Date & rr) { cout << rr.D << "\t" << rr.M << "\t" << rr.Y << endl; return true; } Tag: 2002 Vs. 2003 Tag: 221973
  - 25
    - pointers I want to store WSAEVENT in a collection and am having a problem with pointers. What am i doing wrong? main() { WSAEVENT *a; function(&a); WSAWaitForMultipleEvents(,&a,,,); } void returnarrayWSAEVENTS(WSAEVENTS *pd) { pd = m_vec.begin();//vector<WSAEVENT> m_vec; } Tag: 2002 Vs. 2003 Tag: 221961
- Next
  - 1
    - Add Wave file to an existing AVI I was wondering if there is a way to add WAVE audio to an existing AVI? Thanks in advance, ~Logan Tag: 2002 Vs. 2003 Tag: 221960
  - 2
    - Templated operator overloaded friend function Hi All, I have some code that used to work in VC6, but the stricter VC.NET isn't allowing to compile. Here's a reproduction of the code... template class<T> _DLLExport class MyString { ... public: friend _DLLExport MyString<T> operator + (const MyString<T>& s1, const T * s2); ... }; template<class T> MyString<T> operator + (const MyString<T>& s1, const T * s2) { ... } This now fails with an unresolved external for the operator + function... Looking at the help, it claims that this problem can be fixed by defining the friend as a specialzation of the template function: friend _DLLExport MyString<T> operator + <T> (const MyString<T>& s1, const T * s2); or friend _DLLExport MyString<T> (operator +)<T> (const MyString<T>& s1, const T * s2); But these both fail with compilation errors. Has anyone got any ideas what I am doing wrong? Thanks, Otto Tag: 2002 Vs. 2003 Tag: 221956
  - 3
    - Printing from a dialog based application Hi, I have a dialog based MFC application from which I want to print some text. Does anyone know how I can do that? Does anyone have a working sample? TIA, Drago Tag: 2002 Vs. 2003 Tag: 221951
  - 4
    - Why the VC's MVPs Not heared this problem Hi, all: Following question have been submitted to new group by times, I did'nt understand why there are any one can help me, even though say "Yes, you can do ..." or "No, you can not to do..." Bill ----- Original Message ----- From: "Bill Sun" <sunshang@hotpop.com> Newsgroups: microsoft.public.data.ado,microsoft.public.dotnet.framework.adonet,microsoft .public.dotnet.languages.vc,microsoft.public.dotnet.languages.vc.libraries,m icrosoft.public.vc.language,microsoft.public.vc.mfc Sent: Thursday, December 11, 2003 12:44 PM Subject: How to move the VC6 project which using the ADO to VC.net2003 > Hi, All: > > I have a VC6 project that using general ADO function. When I using VC .net > 2003 compile these project, the error always occurs. It seems that the > VC.Net 2003 not support the old ADO function. Who can help me, and provide > some code demo for do it. I just hope the VC.net 2003 could comiles the old > VC6 source code in ADO. > Any comments welecom. > > Thanks advanced, > > Bill > > Tag: 2002 Vs. 2003 Tag: 221931
  - 5
    - passing struct to class function argument I get this error in declaration of class function. error C2143: syntax error : missing ',' before '&'struct class cShow { Date { int D, M, Y;} cShow(); bool show(const Date & pr); <- error here } I am trying to pass a struct to a class function. In main() I have created struct Date and instance Date dd; Tag: 2002 Vs. 2003 Tag: 221929
  - 6
    - File transfer question again ... Hi, I am implementing client/server programms using winsock to do file transfer. Now I have 'put' and 'get' functions. I have GetFile() and PutFile() functions, GetFile() will get file data from socket and write to destination fiile; PutFile() will read source file data and use winsock TransmitFile() call to write to socket. Now I am testing the client/server with a setup.bmp file with two PCs, pc1 and pc2, both running on w2k. I switch the pcs to be client/server. When client 'put' a file, it sends 'put' command to server (which triggers server to call GetFile()), and then call PutFile(). When Client 'get' a file, it sends 'get' command to server (which triggers server to call PutFile ()), and then call GetFile(). The problem is that the 'put' function works, but 'get' not. Here works means 1) the setup.bmp file can be viewd (or opened) using MS Paint; 2) pc1 and pc2 both work when switched as client/server; not working means when I try to open the transferred file, I got the MS Paint error "There is not enough memory or resources to complete the operation. Choose some programs, and try again". The transferred file size is correct (no error during transfering for either 'put' or 'get'), and 'get' calls the same functions (GetFile() and PutFile()) as 'put' does. I don't understand why 'put' works but not 'get'? Any help is really appreciated. Thanks, Peter Tag: 2002 Vs. 2003 Tag: 221927
  - 7
    - difference between .lib and .dll Hi everybody What is the difference between .lib and .dll files. I know both of them are libraries. Thanks Tom Tag: 2002 Vs. 2003 Tag: 221926
  - 8
    - Win32/64 API an emulation layer on LongHorn? According to this article is appears that .NET will be the native api of LongHorn. http://zdnet.com.com/2100-1107_2-5101117.html Can some knowledgeable person confirm/deny this? I have seen statements on various newsgroups that the Win32/64 API will simply be an emulation on top of the .NET API. True? -d Tag: 2002 Vs. 2003 Tag: 221924
  - 9
    - What is wrong with this compile... Program compiles and links in Release but issues warnings in Debug warning C4786: 'std::reverse_bidirectional_iterator<std::list<std::basic_string<char,std::c har_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::c har_traits<char>,std::allocator<char> > > >::iterator,std::basic_string<char,std::char_traits<char>,std::allocator<cha r> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> > &,std::basic_string<char,std::char_traits<char>,std::allo cator<char> > *,int>' : identifier was truncated to '255' characters in the debug information Tag: 2002 Vs. 2003 Tag: 221922
  - 10
    - Using MFC in a Managed C++ DLL?? Can I? I have some old C code that uses MFC and some C Run Time Library. I need to be able to call this from C# I thought i'd be able to create a Managed C++ DLL, tell the project it was using MFC, include the .c file and be on my way. Can I use MFC in a Managed C++ DLL? If I build a Visual C++ Class Library (.Net) and tell it to use MFC in a Shared DLL I immediately get the following warning nochkclr.obj : warning LNK4099: PDB 'libc.pdb' was not found with 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\nochkclr.obj' or at 'C:\BlueIguana\SymbolPDTSolution\Debug\libc.pdb'; linking object as if no debug info This is before I've typed any code. linking with old run time library things because of the use of things like strupr in the C code? I was hoping I'd build a simple C++ class (2 methods), that would call into this C code and that these methods would be available to my C# code here is what I need to do I have three files.....a LARGE .C file and a good sized .CPP/.h file. I don't have time to port these 1000s of lines of code. These files are actually being called from an C++/MFC application (which I can build and run) but I don't need ANY of the UI that is calling this C code It's sort of strange how this project is set up, but in this MFC app, there is a CPP file with two lines in it, and include of stdafx.h and a include of the above mentioned .C file. I need to call this C code form C#. The C code uses both MFC and run time library calls. Can I do this with a Managed C++ DLL? thanks mike Tag: 2002 Vs. 2003 Tag: 221920
  - 11
    - Why won't this compile? This compiles in gcc but not on vc++ Error message is something like.... structs.h(171) : error C2440: 'initializing' : cannot convert from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' to 'atype' typedef struct { string a; string b; } atype; string ABC = ("123"); string DEF = ("456"); atype mylist[] = { {"ABC", ABC}, {"DEF", DEF} }; Tag: 2002 Vs. 2003 Tag: 221917
  - 12
    - compiler problem with multiple template classes and _THIS_FILE_ when I try to compile this I get a redefination error any help would be greatly appreciated. /****************** Main.cpp file: *******************/ // tst.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "template2.h" #ifdef _DEBUG #ifndef _CRTDBG_MAP_ALLOC #define _CRTDBG_MAP_ALLOC #endif //_CRTDBG_MAP_ALLOC #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif //_DEBUG int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { template2<char> tst("test"); MessageBox(NULL,"tester", tst.getdata(),MB_OK); return 0; } /***********END OF FILE**************/ /*************************** template2.h file: **************************/ // template2.h: interface for the template2 class. // ////////////////////////////////////////////////////////////////////// #if !defined(AFX_TEMPLATE2_H__D1B0BC37_047D_4C67_A2FC_1C9713218F84__INCLUDED_) #define AFX_TEMPLATE2_H__D1B0BC37_047D_4C67_A2FC_1C9713218F84__INCLUDED_ #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 #include "stdafx.h" #include "template1.h" #ifdef _DEBUG #ifndef _CRTDBG_MAP_ALLOC #define _CRTDBG_MAP_ALLOC #endif //_CRTDBG_MAP_ALLOC #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif //_DEBUG template <class DataType> class template2 { template1<DataType> *mp_data; size_t m_size; public: template2(); template2(DataType *data_p); virtual ~template2(); DataType* getdata(); }; #endif // !defined(AFX_TEMPLATE2_H__D1B0BC37_047D_4C67_A2FC_1C9713218F84__INCLUDED_) // template2.cpp: implementation of the template2 class. // ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// template<class DataType> template2<DataType>::template2():m_size(0),mp_data(NULL) { } template<class DataType> template2<DataType>::template2(DataType *p_data) { m_size=sizeof(p_data); mp_data=new template1<DataType>[m_size]; for(unsigned int i=0;i<m_size;++i) { mp_data[i]=p_data[i]; } } template<class DataType> template2<DataType>::~template2() { if(mp_data) delete[] mp_data; mp_data=NULL; m_size=0; } template<class DataType> DataType *template2<DataType>::getdata() { DataType *tmp2=new DataType[m_size]; for(unsigned int i=0;i<m_size;++i) { template1<DataType> tmp=mp_data[i]; tmp2[i]=tmp.getdata(); } return tmp2; } /***********END OF FILE**************/ /****************************************************** template1.h file: ******************************************************/ // template1.h: interface for the template1 class. // ////////////////////////////////////////////////////////////////////// #if !defined(AFX_TEMPLATE1_H__8F1CB26F_7A3C_4D12_8AEF_9DDE309B614F__INCLUDED_) #define AFX_TEMPLATE1_H__8F1CB26F_7A3C_4D12_8AEF_9DDE309B614F__INCLUDED_ #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 #include "stdafx.h" #ifdef _DEBUG #ifndef _CRTDBG_MAP_ALLOC #define _CRTDBG_MAP_ALLOC #endif //_CRTDBG_MAP_ALLOC #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif //_DEBUG template <class DataType> class template1 { DataType m_data; public: template1(); template1(DataType data_p); virtual ~template1(); DataType getdata(); }; #endif // !defined(AFX_TEMPLATE1_H__8F1CB26F_7A3C_4D12_8AEF_9DDE309B614F__INCLUDED_) // template1.cpp: implementation of the template1 class. // ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// template <class DataType> template1<DataType>::template1() { } template <class DataType> template1<DataType>::template1(DataType data_p) { m_data=data_p; } template<class DataType> template1<DataType>::~template1() { } template<class DataType> DataType template1<DataType>::getdata() { return m_data; } /***********END OF FILE**************/ Tag: 2002 Vs. 2003 Tag: 221913
  - 13
    - Where include header files Hi, I have question which might be more style question, as I've never seen any discussion about this in any C/C++ books. Is there a rules where to include files in .h or .cpp ? What I usually do is if I have some xxx module, then all the includes I do in xxx.h and xxx.cpp has only one include to xxx.h, so I generally want to know if there is something wrong in this way. Thank you all in advance Tag: 2002 Vs. 2003 Tag: 221911
  - 14
    - std::map iterator problem I have (inherited) a program using the std::map template. It has many places where it does this: typedef std::map< long, CTrack * > TrackMap; TrackMap m_Tracks; ... TrackMap::iterator cursor; //delcare cursor cursor = m_Tracks.begin(); //initialize while( cursor != m_Tracks.end() && !m_Tracks.empty()){ //check for empty and cursor not at end (fails) pTrack = cursor->second; //returns a pointer even though there is no data in the map if (pTrack){ //even this has a pointer and it's to legal memory, but no a valid CTrack object ... 1. I don't understand why the m_Tracks (map) is not empty as I never put anything in it. 2. I don't understand why the .empty() function does not return true. 3. I don't understand why the m_Tracks.end() does not match the m_Tracks.begin() for an empty map. Of course, if there is no problem with the map template, the code must be putting something in the map. Thanks, Howard Davis hdavs@gate.net Tag: 2002 Vs. 2003 Tag: 221908
  - 15
    - how to detect comport and get the comport name and comport FriendlyName Hi All, Please tell me how to detect exists comport on the computer and how to get comport name and FriendlyName in VC. thank you. BR, Mephist Siu Tag: 2002 Vs. 2003 Tag: 221901
  - 16
    - Upper case What am I doing incorrect. I am trying to check if the first letter of the string is lower, if so convert to upper. string title if (islower(title[0])) { static_cast(toupper(title[0]));}; Tag: 2002 Vs. 2003 Tag: 221900
  - 17
    - Bug in Koenig lookup? namespace a { class ZFoo{}; void Test( void* ){} } void Test( void* ){} template <typename T> struct ZOuter { ZOuter(){ Test( new T() ); } // AMBIGUOUS?! }; template <typename T> class ZInner {}; int main( int argc, char* argv[] ) { ZOuter<ZInner<a::ZFoo> > cls; } The type T for the ZOuter template specialization is ZInner<a::ZFoo> which belongs to the global namespace, but the compiler actually includes the "a" namespace in the unqualified name lookup for Test() and it becomes ambiguous. Is is really correct that just because ZInner is specialized with a type from the "a" namespace, this namespace should be included in argument dependent lookup? If it is, it sucks! Ulf Tag: 2002 Vs. 2003 Tag: 221897
  - 18
    - callntpowerinformation Hi, Everytime I call the function callntpowerinformation I get invalid parameter.I think it may be related to the buffers but I'm not sure. here is what I have: NTSTATUS result; typedef NTSTATUS (WINAPI * CallNtPowerInformation) (POWER_INFORMATION_LEVEL,PVOID,ULONG,PVOID,ULONG); HMODULE handel=LoadLibrary("powrprof.dll"); CallNtPowerInformation Pwrinfo=(CallNtPowerInformation) GetProcAddress(handel, "CallNtPowerInformation"); result=Pwrinfo (ProcessorInformation,NULL,0,&outbuffer,sizeof(outbuffer)); Thanks in advance Tag: 2002 Vs. 2003 Tag: 221896
  - 19
    - convert from seconds to integer Hi All 1) is there any way that i can convert seconds to integer or any other types.(if it its possible can you show me some example) 2)im running a thread and im using there a Sleep(xxxx) function. The problem with a Sleep function its freeze all and i cannot terminate it. is any other solution that can terminate time ??? Thanks Tag: 2002 Vs. 2003 Tag: 221895
  - 20
    - newbie : unexpected end of file while looking for precompiled header directive I am reading a VC book and trying to do an exercise. I dont know why I am getting this problem Code // calculating gas mileage // page 131 arrays chapter #include <iostream> #include <iomanip> using namespace std; int main() { const int MAX = 20; double gas[ MAX ]; long miles[ MAX ]; int count = 0; char indicator = 'y'; while( (indicator == 'y' || indicator == 'y') && count < MAX) { cout << end1; << "enter Gas Quantity: "; cin >> gas[count]; cout << "Enter odometer reading: "; cin >> miles[count]; ++count; cout << "Do you want to enter another (y or no)? "; cin >> indicator; } if(count <= 1) { cout << end1; << "sorry - at least two readings are nessary. "; return 0; } // output results from for(int i = 1; i < count; i++) cout << end1; << setw(2) << i << "."; << " Gas purchased = " << gas[i] << " gallons "; //output gas << " resulted in "; << (miles[i] - miles[i - 1])/gas[i] << " miles per gallon. "; cout << end1; return 0; } Thanks in advance Jim Tag: 2002 Vs. 2003 Tag: 221893
  - 21
    - how to get SetWindowLongPtr address from user32.dll? I use the GetProcAddress to get exported function from user32.dll, such as SetWindowLongA, SetWindowLongW, which can work well. But SetWindowLongPtr have some problem, whatever I used SetWindowLongPtr,SetWindowLongPtrA,SetWindowLongPtrW, it return NULL,the error is displayed "not found that function", it one of user32.lib exported funtion descriped in MSDN, and the mini system surpport is Win95.I worked under WinXP. if SetWindowLongPtr is not a user32.dll exported funtion, which export it? Thanks! Bright Tag: 2002 Vs. 2003 Tag: 221873
  - 22
    - Dynamic loading of DLL when my extension DLL is loaded dynamically in am OCX control, GetProcAddress return a NULL pointer if the function is not exported in a .DEF File though i have exported the function using _declspec(dllexport). And i have a problem exporting overloaded functions in a .DEF file. can somebody help thanx a lot Tag: 2002 Vs. 2003 Tag: 221842
  - 23
    - How to move the VC6 project which using the ADO to VC.net2003 Hi, All: I have a VC6 project that using general ADO function. When I using VC .net 2003 compile these project, the error always occurs. It seems that the VC.Net 2003 not support the old ADO function. Who can help me, and provide some code demo for do it. I just hope the VC.net 2003 could comiles the old VC6 source code in ADO. Any comments welecom. Thanks advanced, Bill Tag: 2002 Vs. 2003 Tag: 221835
  - 24
    - mixed programming of win32 and mfc Hi, I have two questions on mixing use of MFC and Win32, 1. How can I create Win32 childWindow in CDialogs or in other MFC classes after creating a project by MFC AppWizard in eVC3.0 ? 2. How can I create MFC CDialog after i create a pure Win32 application in eVC3.0 ? Any books or material that i can refer to on the above two problems ? Thanks so much Tag: 2002 Vs. 2003 Tag: 221830
  - 25
    - A working SPY++? for Windows 2000? http://support.microsoft.com/default.aspx?scid=3Dkb;en-us;247498 Does anyone know where I can get this version besides installing the = VS.NET application. I don't really want to install this in Windows 2000 = because of its requirement for installing Microsoft Internet Explorer 6. http://support.microsoft.com/?scid=3Dkb;en-us;821164 Thanks. --=20 George Hester __________________________________ Tag: 2002 Vs. 2003 Tag: 221829

Hi all,

got a question about about a static data in a template of template ; this
code does NOT compile under VC++ .NET 2002 :

template<template<typename> class C1, class C2>

class Test
{
public:
Test() { m_i = 1; }

static int m_i;
};

template<template<typename> class C1, class C2>
int Test<C1, C2>::m_i; // ERROR

this seems to be due to the fact that a template of template does not allow
external declarations, so, no way to use static data :(

can anyone tell me if this has been fixed in the 2003 edition ?

tia.

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Re: 2002 Vs. 2003 by David

David
Tue Dec 16 06:43:28 CST 2003

>can anyone tell me if this has been fixed in the 2003 edition ?

I pasted your code snippet into a console application in VS2003 and it
compiled cleanly.

Dave
--
MVP VC++ FAQ: http://www.mvps.org/vcfaq

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Re: 2002 Vs. 2003 by Le

Le
Tue Dec 16 06:50:06 CST 2003

"David Lowndes" <davidl@mvps.org> a écrit dans le message de news:
2evttvcgeiuglrov93fa08vmpfsvpmjq1i@4ax.com...
> >can anyone tell me if this has been fixed in the 2003 edition ?
>
> I pasted your code snippet into a console application in VS2003 and it
> compiled cleanly.
>
> Dave
> --
> MVP VC++ FAQ: http://www.mvps.org/vcfaq

thanks a lot :)
currently, I have no choice but not using static in my template/template...
I'll have to upgrade to version 2003...

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