constant key?

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  - 1
    - Terminating a thread Hi all, This is my situation: i Create a "Father" thread(CreateThrea(...)). in this thread i create "Son" thread(CreateThrea(...)). A son thread in some situation can behave as an infinite loop. im trying to terminate a Son thread that i create it with Exitthread() function. The the father has been terminated and i can see it on the task manager but son still running. is any one can advise how can i terminate an infinit loop thread. i canot use Waitforsingleobject cause it will never be ended. thanks for your help Tag: constant key? Tag: 222222
  - 2
    - COleDateTime, ParseDateTime problems in Korea I have a bit of code that simply takes in a date from an EditCtrl and uses COleDateTime, ParseDateTime to get the date m_Ectrl.GetWindowText(str); if (dt.ParseDateTime(str, VAR_DATEVALUEONLY)) { //some code } The problem is a client in Korea is using my application and it is failing to parse the date that he enters. He enters the date like 17 [korean character for Decmeber] 2003 In english we would enter 17 December 2003. Note: Clients in France, Spain etc have had no problems with this. Is there any issues I should be aware of when dealing with languages like Korean? I have searched on Google and MSDN and come up with nothing so far so I am hoping someone on here can help. Many thanks for your time. Tag: constant key? Tag: 222221
  - 3
    - Importing a DLL: calling function error. I'm importing a DLL and when I call its function "vDecode" I get an error message (see below). I think that the reason is that the function prototype I have is wrong (the DLL documentation -below- could be wrong, old, obsolete). BUT maybe I'm not importing the DLL right (I have not much experience importing DLLs) I reproduce the code below (simplified). Am I forgetting to do something to make this function work? Thanks a lot! Ricardo. ---------------------------------------------------------------- THE ERROR ========= Debug Error! Program: ... PROYECTOS\_TESTS\Coder\Debug\Coder.exe Module: File: i386\chkesp.c Line:42 The value od ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention. (Press Retry to debug the application) THE CODE: ========= typedef void (* VDECODE) (short * wOutputSample, unsigned char * ucInputTRCdata); VDECODE _vDecode; m_hModuleDll = LoadLibrary("coder.dll"); if (m_hModuleDll != NULL) { _vDecode = (VDECODE)GetProcAddress(m_hModuleDll, "vDecode"); } [...] int nFrameSize = 24; short * nOutputSample = new short [160]; unsigned char * byteInputFrame = new unsigned char [nFrameSize]; nBytesRead = filDat.Read(byteInputFrame, nFrameSize); _vDecode (nOutputSample, byteInputFrame); //--> Here the program crashes. filWav.Write(nOutputSample, 320); THE DLL DOCUMENTATION: ======================= void vDecode ( short * wOutputBuff, // Pointer to Output buffer unsigned char * ucInputBuff // Pointer to Input buffer ); Tag: constant key? Tag: 222215
  - 4
    - why it is valid? hi, expert. i find that we can define a function pointer for template argument. for exmaple: template<typename void(*err_handle)()> class List{/*...*/}; ... void err_handler1() {}; ... List<int, &err_hander1> x1; // OK........ now, my question is we can define a pointer that point to non-static member function? i have tested 2 cases: Case 1. template<typename T, void (T::*pfuncType)(const T& ) > class a_t {}; class b { public: void non_virtual(const b& ) {}; virtual void test_virtual(const b& ) {}; protected: private: }; a_t<b,&b::non_virtual> g_non_virtaul; a_t<b,&b::test_virtual> g_test_virtaul; compile it successfully! Case 2. template<typename T, void (T::*pfuncType)(const T& ) > class a_t {}; class b { public: void non_virtual(const b& ) {}; virtual void test_virtual(const b& ) {}; a_t<b,&b::non_virtual> m_non_virtaul; a_t<b,&b::test_virtual> m_test_virtaul; protected: private: }; I can not compile it, why? the error message is error C2327: 'b::non_virtual' : member from enclosing class is not a type name, static, or enumerator Tag: constant key? Tag: 222214
  - 5
    - Lap timer sounds... Hi, I have a small program that I have that detects a slot car passing over a photocell that I read through the printer port. I want to play a sound every time a car passes over a cell, so I need the sounds to play fast and also interrupt each other when the cars pass very close to each other. From what I understand, I need to have the sound coming from memory and not reading in a wave file. From what I see, DirectSound or SndPlaySound are my options. Is this true? If so which is the easiest to use and best for my application? Any source code available? These are small wave files, car 'drive by' sound effects. Thanks for your time Tag: constant key? Tag: 222207
  - 6
    - When having same names. Hi All, I've got a dynamic library which has a export function name called "Export". I've got a C++ class that also has a function called "Export" which needs in turn call the "Export()" function in the .DLL How could I do this ? Would appreciate your help. Tag: constant key? Tag: 222205
  - 7
    - How to access MSR (CPU's model-secpific register) Hello all, I am writing a program to control the LongRun performance level of Crusoe processors. I need to write to CPU's MSR. I tried using __asm & WRMSR instrustion, but get "Privileged Instruction" exception. WRMSR is pri. inst. since 386 in protected mode. Could anyone tell me how to read/write CPU's MSR using Visual C++? Thank you in advance :-) Raymond Tag: constant key? Tag: 222202
  - 8
    - Class Constuctor This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C3C3F6.9BCF4890 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Is there anyway to get a class constructor to init my class wide static = variables? - Mike ------=_NextPart_000_0008_01C3C3F6.9BCF4890 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 6.00.3790.94" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Is there anyway to get a class = constructor to init=20 my class wide static variables?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>- Mike</FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C3C3F6.9BCF4890-- Tag: constant key? Tag: 222195
  - 9
    - problem with isprint(), isspace() and the likes... What is the best microsoft NG to ask questions/report bugs about isprint() and the like functions? Thanks! Tag: constant key? Tag: 222194
  - 10
    - USB Safe Removal Hello all, I have developed a simple application which loads and accesses a mass-storage device in 2k/XP. Now, I would like to transfer that code over to a service. Everything seems to have transferred well except for the safe removal code. It seems the call to CM_Request_Device_Eject() was failing due to the lack of interactive logon. After some research, I found a suggestion to use CM_Query_And_Remove_SubTree() because it does not do the interactive logon check. After trying this, I now get code 0x34 (CR_CALL_NOT_IMPLEMENTED?) returned from CM_Query_And_Remove_SubTree(). Any ideas of what I can do here? The problem is simple: How can I perform a safe removal from a service? Thanks for you attention. Tony Tag: constant key? Tag: 222191
  - 11
    - Knowledge Base Article - 176513 MS VC++ 6.0 Hi, can enybody say me, how to read information from the TZI field? (Please take a look at KB 176513). What does the field MapID mean? Thank you for help. Lubomir Tag: constant key? Tag: 222185
  - 12
    - Platform SDK? Hey MVP's which group is appropriate for a basic Platform SDK question? ~mike Tag: constant key? Tag: 222184
  - 13
    - string I have the following line of the code where I am deleting the spaces after the last char. How do I delete the spaces before the char? string.erase (string.find_last_not_of (" ") + 1 ) ; Tag: constant key? Tag: 222181
  - 14
    - EnumJobs/GetJob problem... Hello everybody, I'm trying to monitor the Windows printing queue. It is=20 very importan for my app to gather=20 the paper size and if the printing is color or monochrome.=20 I call the following function=20 after the user has chosen the printer: BOOL CEnumJobsDlg::GetQueue(HANDLE hPrinter) { DWORD cByteNeeded,=20 nReturned=3D0,=20 cByteUsed,=20 i; JOB_INFO_2 *pJobStorage =3D NULL,=20 *pJob_Info_2=3DNULL; PRINTER_INFO_2 *pPrinterInfo =3D NULL; if (hPrinter) { /* Get the buffer size needed */ if (!GetPrinter(hPrinter, 2, NULL, 0,=20 &cByteNeeded)) { if (GetLastError() !=3D=20 ERROR_INSUFFICIENT_BUFFER) goto Fail; } pPrinterInfo =3D (PRINTER_INFO_2 *)malloc (cByteNeeded); if (!(pPrinterInfo)) /* failure to allocate memory */ goto Fail; =09 /* get the printer info */ if (!GetPrinter(hPrinter, 2, (LPBYTE) pPrinterInfo, cByteNeeded, &cByteUsed)) { // failure to access the printer=20 free(pPrinterInfo); pPrinterInfo =3D NULL; goto Fail; }=20 /*At this point I can see the configuration of the=20 printer with valid data in=20 the pPrinterInfo->pDevMode pointer to the DEVMODE=20 structure. */ =09 /* Get job storage space */ if (!EnumJobs(hPrinter,=20 0,=20 (pPrinterInfo)->cJobs,=20 2,=20 NULL,=20 0, (LPDWORD)&cByteNeeded, (LPDWORD)&nReturned)) { if (GetLastError() !=3D=20 ERROR_INSUFFICIENT_BUFFER) goto Fail; } pJobStorage =3D (JOB_INFO_2 *)malloc (cByteNeeded); if (!pJobStorage) /* failure to allocate Job storage=20 space */ goto Fail; =09 ZeroMemory(pJobStorage, cByteNeeded); /* get the list of jobs */ if (!EnumJobs(hPrinter,=20 0,=20 (pPrinterInfo)->cJobs,=20 2,=20 (LPBYTE)pJobStorage,=20 cByteNeeded, (LPDWORD)&cByteUsed, (LPDWORD)&nReturned)) { goto Fail; } /* I send a print job with the Notepad.exe, I check the=20 information pointed by pJobStorage debugging the execution, and I see the right=20 information (like the=20 document name, tha machine name, etc., I mean the=20 information in the JOB_INFO_2 structure)=20 but the pDevMode value is NULL this time.=20 */ (pPrinterInfo)->cJobs =3D nReturned; } else goto Fail; /*Then I try to look at each individual print job with the=20 GetJob API function with the=20 following code, but the same: I cannot get de information=20 pointed by pDevMode because=20 its value is NULL. I wonder what is wrong in this code. */ =09 for (i =3D 0; i < pPrinterInfo->cJobs; i++) { if (!GetJob(hPrinter,pJobStorage [i].JobId,2,NULL,0,&cByteNeeded)) if (GetLastError() !=3D=20 ERROR_INSUFFICIENT_BUFFER) goto Fail; pJob_Info_2 =3D (JOB_INFO_2 *)malloc (cByteNeeded); ZeroMemory(pJob_Info_2, cByteNeeded); if (!pJob_Info_2) /* failure to allocate Job storage=20 space */ goto Fail; if (!GetJob(hPrinter,pJobStorage [i].JobId,2,LPBYTE(pJob_Info_2),cByteNeeded,&nReturned)) goto Fail; } free(pJob_Info_2); free(pJobStorage); free(pPrinterInfo); =09 return TRUE; Fail: free(pJobStorage); free(pPrinterInfo); return FALSE; }=20 /* end of function GetQueue */ Any ideas? Thanks in advance. Juvenal Le=F3n Tag: constant key? Tag: 222180
  - 15
    - Breaking the encapulation There are two instances, Obj1 and Obj2, of the same class. What is a simplest way to access private or protected data of Obj1 from within Obj2? Thanks! Tag: constant key? Tag: 222179
  - 16
    - What is a .rc2 file? I have a VC++ 6 project that I've received via email and I'm trying to get it to build. The workspace says there's supposed to be a myproject.rc2 file, but I didn't get one with the package. What is contained in an rc.2 file, and can I generate a new one? All the application resources seem to be intact (dialogs, menus, icons, etc) in the .rc file. Thanks. Tag: constant key? Tag: 222161
  - 17
    - dependency issue, build instead of rebuild We have several projects where we #include "resource.h" in stdafx.h (I know, bad practice, but let's ignore that for now). For some reason when we make a change to resource.h and build the project, the compiler doesn't realise it needs to rebuild stdafx.cpp. It thinks everything is up to date. But when it compiles the .cpp file that uses the new ID we just defined, say, it gives an error that the ID is not defined, because it hasn't compiled the new resource.h. So any time we change resource.h, we have to Rebuild All instead of just Build. Any idea why that would be? Other .h files included in stdafx.h work just fine--when they change the compiler knows to rebuild stdafx.cpp etc. Nate Hekman Calgary, Alberta, Canada Tag: constant key? Tag: 222157
  - 18
    - adding dll's and lib's I have a 3rd party library containing a .lib file and a dll. My understanding is that the .lib is used at link time and the dll at run time, is this correct? I know how to add the .lib to my project, but how does the application know it needs the dll? And where do I put it in the directory structure? Thanks Tag: constant key? Tag: 222154
  - 19
    - DDX_TIME in VC++6.0 Hi Is DDX_Time is declared in VC++ 6.0 I am trying to compile the old source code i am getting error as error C2065: 'DDX_Time' : undeclared identifie Best Regard John Tag: constant key? Tag: 222149
  - 20
    - Code Emission Hi, I am just wondering what VC++ 6.0 and VC++.NET does the compiler emits certain MMX, SSE, SSE2 etc code or higher advanced code we can have from the P4? e.g. do3d() -----> poafpso xmm sldkufds xmm2 etc Thanks Jack Tag: constant key? Tag: 222146
  - 21
    - [Howto] Is it possible using ole in the windows service under the windows have not logon's state? is it possible using ole in the windows service under the windows have not logon's state? detail: i have a window service program. and i set the service 's state is "auto run" the service program using the printer object and ole object and dde object then can the service program normally running when the computer startup, but without window login ? i try the service, but i cannot run through, is it the window service's limition ? everyone know that please replay, i will very thank . Tag: constant key? Tag: 222145
  - 22
    - 'void' illegal with all types Hi, while I compile a iis sdk sample: ASyncWrite, I got the error: 'void' illegal with all types. because of the following statement: ----- fReturn = (InitFileHandleCache() == NO_ERROR); ----- Here below is their definition: BOOL fReturn = TRUE; VOID InitFileHandleCache(VOID) { InitializeCriticalSection(&g_csOpenFiles); } In what condition this code will compile ? How to get it work ? Thanks! peter lin Tag: constant key? Tag: 222133
  - 23
    - This simple file I/O code should work but doesnt (VC6 ent. sp5) Hi all. I'll present this simple code straight away and then I'll sketcht the (irritating) problem: # include <iostream> # include <fstream> # include <ostream> # include <string> //# include <cstddef> <<<===== What for? What does it do? using namespace std; struct Customers { int Num; char Pkg; float Hours; string Bill; }; bool GetCust( const string& filename, Customers* P ) { ifstream InFile( filename.c_str() ); if( !InFile ) return false; // You could use a for loop too, if you wish. size_t Idx( 0 ); while( InFile>>P[Idx].Num>>P[Idx].Pkg>>P[Idx].Hours>>P[Idx].Bill ) ++Idx; if( !InFile.eof() ) return false; return true; } void DisplayCustomers( const Customers* P, const size_t Size ) { for( size_t Idx = 0; Idx < Size; ++Idx ) { cout << P[ Idx ].Num << " " << P[ Idx ].Pkg << " " << P[ Idx ].Hours << " " << P[ Idx ].Bill << endl; } } int main() { Customers People[49]; //PROBLEM CHILD RIGHT HERE, NEWSGROUP READERS! if( !GetCust( "CustomerFile.txt", people ) ) cout << "Error: Could not read file properly."<<endl; else DisplayCustomers( People, sizeof People / sizeof* People ); return 0; } Yes that's right, I was excercising basic file I/O. Look in main(). - If I declare "Customers People[49]" in main() then I'll get an exception error while running. Note that the file (CustomerFile.txt) has indeed 49 lines of customer data. No problem there. - But if I declare Poeple[50] in main() then everything works fine except for the fact that index-50-variables return rubbish. Offcourse it does, no problem there either. - But if I declare People[49] globally, then everything works just fine. What is going on here? As far as I know the code presented above shoudl work nicely. Nevermind my skills in file I/O. Just learning. Unless it is related to the exception error. Thank you all, Val Tag: constant key? Tag: 222129
  - 24
    - How to recycle codes for ActiveX project? I need to develope a different version of ActiveX which shares 90% codes with an ActiveX project I completed a while ago so I would like to recycle as much source codes as possible. My old ActiveX project was started on VC++'s ActiveWizard. I thought I could simply create a new project so that I have an unique UUIDs, then copy the .odl file to the old project, and modify some names in .cpp files. When I did that, the project builds fine, but it won't register. Any suggestion how to recycle sources in such case? Thanks! . Tag: constant key? Tag: 222127
  - 25
    - VC++ and XML How do I access XML from VC++ dll. Can you let me know how I can include xml files or or how I should #import them. Thanks Tag: constant key? Tag: 222115
- Next
  - 1
    - "Enable Run-time Type Information" I tried checking/unchecking the checkbox of "Enable Run-time Type Information" and saw nothing affected with regards to using "typeid()" and related code. The code can still compile and run and provide with RTTI info. What gives with such setting under Project/Setting...? Thanks! Tag: constant key? Tag: 222110
  - 2
    - overloaded operator Hi All, Suppose I have a class of my own, CVCEditBox and I overload a few operators like this: class CVCEditBox : public CStatic { .... CVCEditBox operator+ (const CVCEditBox& TheString) const; ... } And then, the implementation of this operator would be: CVCEditBox CVCEditBox::operator+(const CVCEditBox& TheString) const { return CVCEditBox((CString) SomeString); } By the way, I do have an argument constructor that takes a CString.. The question is, is there any problem if I do the overloading this way ? [returning the constructor of the object] It seems to work but I am wondering if I should do it differently (maybe a more efficient way .. it seems to me that returning the constructor rathern than a combination of *this / CVCEditBox& uses more memory since it does a copy/create a new object ?!] Thanks in advance, Marius Tag: constant key? Tag: 222109
  - 3
    - 2002 Vs. 2003 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. Tag: constant key? Tag: 222107
  - 4
    - 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: constant key? Tag: 222104
  - 5
    - 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: constant key? Tag: 222096
  - 6
    - 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: constant key? Tag: 222074
  - 7
    - 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: constant key? Tag: 222072
  - 8
    - 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: constant key? Tag: 222069
  - 9
    - 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: constant key? Tag: 222055
  - 10
    - 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: constant key? Tag: 222048
  - 11
    - 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: constant key? Tag: 222047
  - 12
    - 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: constant key? Tag: 222042
  - 13
    - 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: constant key? Tag: 222040
  - 14
    - 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: constant key? Tag: 222036
  - 15
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  - 16
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  - 17
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  - 23
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  - 24
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  - 25
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hi guys..

in c# when you want to deal with file path.. I will use "@"
str_FileName=@"c:\fwefwef\new filename";

in c++? which character should I use?

pls advise,
Nigil Chua

Re: constant key? by Heinz

Heinz
Wed Dec 17 07:15:41 CST 2003

"Nigil LaVey" <lavey@pacific.net.sg> schrieb im Newsbeitrag =
news:OLBLidJxDHA.560@TK2MSFTNGP11.phx.gbl...
: hi guys..
:=20
: in c# when you want to deal with file path.. I will use "@"
: str_FileName=3D@"c:\fwefwef\new filename";
:=20
: in c++? which character should I use?
:=20
: pls advise,
: Nigil Chua

There is no such feature in C/C++. You must either escape each backslash =
character like

str_FileName =3D "c:\\fwefwef\\new filename";

or use / instead of \, like

str_FileName =3D "c:/fwefwef/new filename";

Regards
Heinz

Re: constant key? by James

James
Wed Dec 17 12:51:38 CST 2003

In C#, the @ before a string constant means that "" (two double quotes)
is translated in a single double-quote, and no other translations are
done --- every other character is as it appears.

Without the @, in C# and in C++, \ means the character that immediately
follows it has a special meaning. For example, \t means the tab character
(0x09), \n means the line feed (0x0A) etc. Among these is \\ (double
backslash), which is translated into a single backslash.

--
Truth,
James Curran
Home: www.noveltheory.com Work: www.njtheater.com
Blog: www.honestillusion.com Day Job: www.partsearch.com
(note new day job!)
"Nigil LaVey" <lavey@pacific.net.sg> wrote in message
news:OLBLidJxDHA.560@TK2MSFTNGP11.phx.gbl...
> hi guys..
>
> in c# when you want to deal with file path.. I will use "@"
> str_FileName=@"c:\fwefwef\new filename";
>
> in c++? which character should I use?
>
> pls advise,
> Nigil Chua
>
>

Re: constant key? by Nigil

Nigil
Mon Dec 22 05:13:50 CST 2003

thanks guys....

should have thought that... just that I want some solid answer to get rid of
that thing from my mind....

best regards to all and have a happy holidays...:)

"Nigil LaVey" <lavey@pacific.net.sg> wrote in message
news:OLBLidJxDHA.560@TK2MSFTNGP11.phx.gbl...
> hi guys..
>
> in c# when you want to deal with file path.. I will use "@"
> str_FileName=@"c:\fwefwef\new filename";
>
> in c++? which character should I use?
>
> pls advise,
> Nigil Chua
>
>