_bstr_t

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ VC
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - VS 2005 re-compile whole project each time Hi. I have some win32 project where I have about 20 .cpp files. When I make change in one of them, VS re-compile each .cpp source each time. I've tried almost every project option but without result. Is there any known trodden way to check where I'm wrong? Thanks in advance. Tag: _bstr_t Tag: 270318
  - 2
    - MIDL link problem - upgrade to VC8 Hello, I am upgrading the VC++6.0 project to 2005. In the project I have 2 idl files. I get the next errors: LssSsc_s.obj : error LNK2005: "struct _MIDL_PROC_FORMAT_STRING const __MIDL_ProcFormatString" (?__MIDL_ProcFormatString@@3U_MIDL_PROC_FORMAT_STRING@@B) already defined in LssPsc_s.obj LssSsc_s.obj : error LNK2005: "struct _MIDL_TYPE_FORMAT_STRING const __MIDL_TypeFormatString" (?__MIDL_TypeFormatString@@3U_MIDL_TYPE_FORMAT_STRING@@B) already defined in LssPsc_s.obj 111.exe : fatal error LNK1169: one or more multiply defined symbols found When I look at .c generated files I see the declaration in 2 files: typedef struct _MIDL_TYPE_FORMAT_STRING { short Pad; unsigned char Format[ TYPE_FORMAT_STRING_SIZE ]; } MIDL_TYPE_FORMAT_STRING; typedef struct _MIDL_PROC_FORMAT_STRING { short Pad; unsigned char Format[ PROC_FORMAT_STRING_SIZE ]; } MIDL_PROC_FORMAT_STRING; Any idea how to avoid it? Why is the problem in VC2005? Thanks Tag: _bstr_t Tag: 270316
  - 3
    - _mbscpy_s confusion Hi All! I'm new to cpp and getting severely beat up by some pointer stuff. I have an unsigned char array buffer with some data including the length of a string followed by the chars of the string. This byte array is received from a client via socket - all that works fine. I am trying to call _mbscpy_s to get the string out of the buffer: BYTE buf[BUF_SIZE]; // 1024 // buf bytes look like this buf[0] = 0 next four are length of 'name' buf[0] = 9 buf[0] = 0 buf[0] = 0 buf[0] = 0 'name' starts here buf[5] = 112 'p' buf[6] = 97 'a' buf[7] = 114 'r' etc. Now, the code: unsigned char* name = new unsigned char [iNameLen]; // length is 9 errno_t err = _mbscpy_s( name, iNameLen, &buf[5] ); throws a 'Buffer too small' exception but errno_t err = _mbscpy_s( name, iNameLen, &buf[4] ); doesn't throw, although *name = 0, which is as expected. How do I get my multi-byte string out of the buffer? Please help me make the pain go away! Thank you!!! Kevin Montreal, QC Tag: _bstr_t Tag: 270315
  - 4
    - Pls--Need help with Hellow World! with MS Visual C++ 6.0 For some reason I cannot get my HelloWorld program to display "Hello World!" on the output window. My program compiles, links, and executes without errors. After executing this program a window appears with a white background and no text. I am running MS Visual C++ 6.0 Professional Edition. TIA Here's my program: // The Hello World #include<stdafx.h> #include<iostream.h> #include<conio.h> int main() { cout << "Hello World!" << endl; getch(); return 0; } --------------------- I tried // The Hello World #include<stdafx.h> #include<iostream.h> #include<conio.h> int main() { cout << "Hello World!" << endl; /*** getch(); ***/ return 0; } ---------------------- And I still get a blank window to appear when I execute the program. I would expect a window to quickly flash on the screen and go away, but the window remains until I close it. I created this with Win32 Console selected. Another question I have is why do I need stdafx.h? Tag: _bstr_t Tag: 270304
  - 5
    - about stderr May I use in Microsoft C++ the following statement or I will get an error? #include <cstdio> ...... std::fputs( msg.c_str(), std::stderr ); .... Vladimir Grigoriev Tag: _bstr_t Tag: 270289
  - 6
    - More than StringCchPrintf is broken Since some of the source code for Windows CE is public, I tried to see if I could find just where StringCchPrintf breaks programs. I haven't found it yet but I found the following gem. void WideToAnsi (const WCHAR *wcs, char *sz, DWORD cch) { #ifdef TARGET_BUILD DWORD i = 0; cch--; while (i < cch && wcs[i]) { sz[i] = (char) wcs[i]; i++; } sz[i] = 0; #endif } Even when the device's code page is 932 or a Chinese or Korean character set. Brillant. Tag: _bstr_t Tag: 270282
  - 7
    - Change cursor - Windows mobile 5.0 Hi folks, I am trying to change the default cursor to custom or a standard hand cursor on a windows mobile 5.0 application. I tried different things but I keep getting error 6 (invalid handle) when loading the cursor. 1. First I tried LoadCursor() with standard and custom cursors HCURSOR hCursor = LoadCursor(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDC_MYCURSOR)); 2. The wait cursor is the only one to work on my app. SetCursor(LoadCursor(NULL, IDC_WAIT)); The hand cursor does not work SetCursor(LoadCursor(NULL, IDC_HAND)); 3. Then I tried LoadImage() HANDLE hCursor = LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDC_CURSOR1), IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE); But the identifier "LR_DEFAULTSIZE" is not defined even if I include "Winuser.h". I read that the LR_MONOCHROME might help but once again this is not defined. Now the documentation talks about linking to "Cursor.lib" and "Mcursor.lib". I do not have those libs and I did not find them on the web either...? So is it really possible to do what I need? What did I miss? Thanks in advance, -- ST --------------------------- stopin@nospam.nospam Tag: _bstr_t Tag: 270281
  - 8
    - StringCchPrintf is broken StringCchPrintf is broken, verified with the debugger in Visual Studio 2005 on Windows XP Pro, target running on a Windows Mobile 5 Pocket PC. All machines, Windows versions, and Visual Studio 2005 are the same language version, Japanese. The Windows Mobile 5 Pocket PC SDK is US-English. char devnm[50]; // ANSI because gethostname doesn't handle Unicode char *mdlnm = "Pocket PC"; // ANSI for no reason at the moment gethostname(devnm, sizeof devnm); #ifdef _UNICODE StringCchPrintf(szTraceInfo, ARRAYSIZE(szTraceInfo), _T("device type \"%S\", hostname \"%S\""), mdlnm, devnm); #else StringCchPrintf(szTraceInfo, ARRAYSIZE(szTraceInfo), _T("device type \"%s\", hostname \"%s\""), mdlnm, devnm); #endif // breakpoint on the next line of code ... The Unicode version of StringCchPrintf was executed, as expected in Windows CE. mdlnm was a constant this time as shown: Pocket PC devnm was an ANSI string 15 bytes long including the NUL terminator: ソフト開発iPaq The result: device type "Pocket PC", hostname "" StringCchPrintf really can't handle conversion between ANSI and Unicode, so maybe that's why MSDN doesn't say it can. (Except that StringCchPrintf managed to handle one conversion, where a string only used a small subset of all the characters that exist in the default and current code page.) Tag: _bstr_t Tag: 270274
  - 9
    - Problems with boost::threads and C++/CLI using VS 2005 SP1 Beta If I link my /clr application to the boost::thread library when using the new SP1 I get the following error when running my application The application failed to initialize properly (0xc000007b). Click on OK to terminate the application. If I run it in the debugger it gives the same error and never breaks into something I can step through. This worked fine pre-SP1 so I'm guessing something's changed. I have made sure that I've recompiled the boost libraries afer SP1. I've posted to the boost newsgroup and they've said they're not doing anything 'CLI hostile' and they would expect it to work. Is this the proper place to report issues with the service pack? Here's a simple example which will fail when compiled with /clr. Note that including the boost::thread header automatically links with the library. #include <boost/thread/thread.hpp> int main( int argc, const char* * argv ) { return 1; } Any help would be appreciated. John Dunn Tag: _bstr_t Tag: 270267
  - 10
    - One spin control works, one doesn't!!! Hey All! I'm stumped! I have two dialogs, both dealing with Hours:Minutes. In the first dialog the spin control is defined in the .rc as: CTEXT "",ST_HOUR,15,11,18,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_HOUR,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS | WS_TABSTOP,33,11,10,10 CTEXT "",ST_MINUTE,43,11,18,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin2",SB_MINUTE,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS | WS_TABSTOP,61,11,10,10 LTEXT "AM",TX_AMPM,76,13,12,12,NOT WS_GROUP And the setup code is: // setup spin buttons SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_SETRANGE, 0, MAKELONG(23, 0)); SendDlgItemMessage(hWndDlg, SB_MINUTE, UDM_SETRANGE, 0, MAKELONG(59, 0)); SetDlgItemText(hWndDlg, ST_HOUR, "12"); SetDlgItemText(hWndDlg, TX_AMPM, szAm); SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_SETPOS, 0, MAKELONG((short) 0, 0)); And the reading code is: int nValue = (int)SendDlgItemMessage(hWndDlg, SB_HOUR, UDM_GETPOS, 0, 0L); if (nValue >= 12) { SetDlgItemText(hWndDlg, TX_AMPM, szPm); wsprintf(szWorkBuf, "%02d", (nValue>12)?nValue-12:12); SetDlgItemText(hWndDlg, ST_HOUR, szWorkBuf); } Now, in the above the dialog is loaded, the spin control is initialized and the displayed value is 12:00am. When the user presses the down arrow for the HOUR the spin control is read and returns nValue == 23 which is CORRECT! I have another dialog which uses almost the exact same code which behaves VERY badly! Here is the control definition in the .rc file: CTEXT "",ST_START_HOUR,14,19,16,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_START_HOUR,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS,29,19,10,10 CTEXT "",ST_START_MIN,39,19,16,10,WS_BORDER | NOT WS_GROUP CONTROL "Spin1",SB_START_MIN,"msctls_updown32",UDS_WRAP | UDS_SETBUDDYINT | UDS_AUTOBUDDY | UDS_ARROWKEYS | UDS_NOTHOUSANDS,55,19,10,10 LTEXT "am",ST_START_AMPM,66,20,12,9,NOT WS_GROUP Here is the code which initializes the spin control: // setup spin buttons SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_SETRANGE, 0, MAKELONG(23, 0)); SendDlgItemMessage(hWndDlg, SB_START_MIN, UDM_SETRANGE, 0, MAKELONG(59, 0)); SetDlgItemText(hWndDlg, ST_START_HOUR, "12"); SetDlgItemText(hWndDlg, ST_START_AMPM, szAm); SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_SETPOS, 0, MAKELONG((short) 0, 0)); Here is the code which reads the dialog control: int nValue = (int)SendDlgItemMessage(hWndDlg, SB_START_HOUR, UDM_GETPOS, 0, 0L); if (nValue >= 12) { SetDlgItemText(hWndDlg, ST_START_AMPM, szPm); wsprintf(szWorkBuf, "%02d", (nValue>12)?nValue-12:12); } SetDlgItemText(hWndDlg, ST_START_HOUR, szWorkBuf); OK, now here's where the problem surfaces. First, when this control is displayed its starting value is set to ZERO (not 12). Second, and this is BIG, if the user clicks the down arrow on this control the nValue is set to 11 which is WRONG, it should be 23!!! The only other piece of information I can share is that the 2nd spin control is in a separate dialog which is called by the dialog containing the first spin control. I've looked at this until my eyes have crossed... help please! Phil =============================================== half frog half prince at oohay dot com =============================================== Tag: _bstr_t Tag: 270254
  - 11
    - transmitFile() function How can transmit memory-mapped files using transmitFiles() function?. Tag: _bstr_t Tag: 270249
  - 12
    - Command line cross-compile X86, X64 and IA64 Visual Studio 2005 Hi, I want to builds several librairies (lib and dll) by using the command line (cl.exe, link.exe, ...) with VS2005. I know the option /MACHINE:{X86, X64, IA64} for the linking but is there a similar option for the compiler? All librairies that I build are the same size witch is impossible. Here are the command line that I use : cl.exe @" /c /Wp64 /O2 /D _WIN64 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _CRT_NON_CONFORMING_SWPRINTFS /D NDEBUG /D _WINDOWS /D _MBCS /Z7 /Zc:wchar_t " and link.exe " /MACHINE:IA64 /implib:" kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /incremental:no libpath:"PATH" " So, I think the link go to the right target but the problem is cl.exe. How to specify to target machine ? /bin/amd64/cl.exe can execute /bin/ia64/cl.exe can't execute Regards Eric Tag: _bstr_t Tag: 270248
  - 13
    - Reallocating arrays of classes How do I resize an array of classes which have been allocated using new in Visual c++ 6 class MyClass { public: }; int main() { MyClass *pMyClass = new MyClass[5]; pMyClass = (MyClass*)realloc(pMyClass,7 * sizeof MyClass); delete [] pMyClass; } This doesn't work Thanks Tag: _bstr_t Tag: 270242
  - 14
    - operator overload question ok here's another one: I get these errors when compiling my code 1>c:\programme\microsoft visual studio 8\vc\include\xutility(256) : error C2666: 'eoScalarFitness<ScalarType,Compare>::operator <' : 2 overloads have similar conversions 1> with 1> [ 1> ScalarType=double, 1> Compare=std::greater<double> 1> ] 1> cvs-eo\eo\src\eoscalarfitness.h(59): could be 'bool eoScalarFitness<ScalarType,Compare>::operator <(const eoScalarFitness<ScalarType,Compare> &) const' 1> with 1> [ 1> ScalarType=double, 1> Compare=std::greater<double> 1> ] 1> or 'built-in C++ operator<(double, double)' 1> while trying to match the argument list '(eoScalarFitness<ScalarType,Compare>, const double)' 1> with 1> [ 1> ScalarType=double, 1> Compare=std::greater<double> 1> ] 1> c:\programme\microsoft visual studio 8\vc\include\algorithm(2063) : see reference to function template instantiation 'bool std::_Debug_lt<_Ty,eoScalarFitness<ScalarType,Compare>>(const _Ty1 &,_Ty2 &,const wchar_t *,unsigned int)' being compiled 1> with 1> [ 1> _Ty=double, 1> ScalarType=double, 1> Compare=std::greater<double>, 1> _Ty1=double, 1> _Ty2=eoScalarFitness<double,std::greater<double>> 1> ] 1> c:\programme\microsoft visual studio 8\vc\include\algorithm(2075) : see reference to function template instantiation '_FwdIt std::_Upper_bound<std::_Vector_iterator<_Ty,_Alloc>,double,__w64 int>(_FwdIt,_FwdIt,const double &,_Diff *)' being compiled 1> with 1> [ 1> _FwdIt=std::_Vector_iterator<eoMinimizingFitness,std::allocator<eoMinimizingFitness>>, 1> _Ty=eoMinimizingFitness, 1> _Alloc=std::allocator<eoMinimizingFitness>, 1> _Diff=__w64 int 1> ] 1> cvs-eo\eo\src\eoproportionalselect.h(75) : see reference to function template instantiation '_FwdIt std::upper_bound<std::_Vector_iterator<_Ty,_Alloc>,double>(_FwdIt,_FwdIt,const double &)' being compiled 1> with 1> [ 1> _FwdIt=std::_Vector_iterator<eoMinimizingFitness,std::allocator<eoMinimizingFitness>>, 1> _Ty=eoMinimizingFitness, 1> _Alloc=std::allocator<eoMinimizingFitness> 1> ] 1> cvs-eo\eo\src\eoproportionalselect.h(71) : while compiling class template member function 'const eoBit<FitT> &eoProportionalSelect<EOT>::operator ()(const eoPop<EOT> &)' 1> with 1> [ 1> FitT=eoMinimizingFitness, 1> EOT=eoBit<eoMinimizingFitness> 1> ] 1> cvs-eo\eo\src\do\make_algo_scalar.h(200) : see reference to class template instantiation 'eoProportionalSelect<EOT>' being compiled 1> with 1> [ 1> EOT=eoBit<eoMinimizingFitness> 1> ] 1> cvs-eo\eo\src\ga\make_algo_scalar_ga.cpp(60) : see reference to function template instantiation 'eoAlgo<EOT> &do_make_algo_scalar<eoBit<FitT>>(eoParser &,eoState &,eoEvalFunc<EOT> &,eoContinue<EOT> &,eoGenOp<EOT> &,eoDistance<EOT> *)' being compiled 1> with 1> [ 1> EOT=eoBit<eoMinimizingFitness>, 1> FitT=eoMinimizingFitness 1> ] the code in xutility is template<class _Ty1, class _Ty2> inline bool __CLRCALL_OR_CDECL _Debug_lt(const _Ty1& _Left, _Ty2& _Right, const wchar_t *_Where, unsigned int _Line) { // test if _Left < _Right and operator< is strict weak ordering if (!(_Left < _Right)) return (false); else if (_Right < _Left) // LINE 256 _DEBUG_ERROR2("invalid operator<", _Where, _Line); return (true); } There is an operator overload defined template <class ScalarType, class Compare > class eoScalarFitness { public : eoScalarFitness() : value() {} eoScalarFitness(const eoScalarFitness& other) : value(other.value) {} eoScalarFitness(const ScalarType& v) : value(v) {} eoScalarFitness& operator=(const eoScalarFitness& other) { value = other.value; return *this; } eoScalarFitness& operator=(const ScalarType& v) { value = v; return *this; } operator ScalarType(void) const { return value; } /// Comparison, using less by default bool operator<( const eoScalarFitness & other) const { return Compare()(value, other.value); } // THIS IS THE FAULTY? OVERLOAD // implementation of the other operators bool operator>( const eoScalarFitness<ScalarType, Compare>& y ) const { return y < *this; } // implementation of the other operators bool operator<=( const eoScalarFitness<ScalarType, Compare>& y ) const { return !(*this > y); } // implementation of the other operators bool operator>=(const eoScalarFitness<ScalarType, Compare>& y ) const { return !(*this < y); } private : ScalarType value; }; -> How can I force msvc to use overload in order to end it's confusion about which one to use? cheers, Oliver Tag: _bstr_t Tag: 270234
  - 15
    - Circular DLL dependencies Although circular dependencies are something developers should normally avoid, unfortunately they are very easy to create accidentally between classes in a VS project (i.e. circular compile-time dependencies). But then I started wondering how "easy" it would be to similarly make a NON-RUNTIME circular dependency between (implicitly linked) DLLs. After all, authors like John Lakos tell us to avoid such circular dependencies between "packages" (i.e. libraries). But to my surprise, evidently it isn't possible to create a library circular dependency even if you try... Tonight I tried to make a circular dependency by creating two Win32 console DLLs in a new solution, and attempted to make both have a (implicit link) dependency on the other. But no matter how I tried, in the end I always got a linker error about missing symbols - because DLL 'A' needed the type library of DLL 'B', which did not exist yet because DLL 'B' needed the type library of DLL 'A'. A similar problem occurred if I made both projects just static libraries (instead of DLLs). In the end, I concluded that to make the circular dependency I would need to involve some kind of externalized interface descriptions - such as IDL (e.g. CORBA?). But if I used IDL in that fashion, I figure I would end up with something that is more akin to circular runtime dependency rather than a non-runtime dependency. Can anyone give me an example of how DLLs (or even static LIBs) can get involved in a circular dependency? I'm scrutinizing this topic because authors like John Lakos ("Large Scale C++") talk about how "packages" (aka libraries) should be forced away from cyclical dependencies. Well, why make all that effort of preaching against circular package/library dependencies, if its not even possible to make such circular dependencies in the first place? Tag: _bstr_t Tag: 270233
  - 16
    - virtual functions with default arguments Hi, Suppose we have class A { public: virtual void f(int = 3) = 0; }; class B : public A{ public: virtual void f(int i = 6) { cout << i; } }; A *p = new B; p->f(); // .. The question is; Is this a standard C++ feature when f prints 3 (base class's default value) instead of 6 (the one which is in the actually called function)? Thanks in advance. -- ====== Arman Tag: _bstr_t Tag: 270230
  - 17
    - TrackPopupMenuEx returns 1446 I keep getting this error from my code(TrackPopupMenuEx) below. Could anybody please tell me why? 1446 = Popup menu already active. Note: I haven't called TrackPopupMenuEx before this. So it strikes me as strange. Code(for MenuBar) is called from WH_KEYBOARD hook. The function is triggered by the up and down arrow keys(pressed down/no repeat keys) on the keybord. Toolbar has a key that is hot itemed before the code. void UpDownArrow() { RECT rc; SendMessage(TB_GETRECT,(WPARAM)0, (LPARAM)&rc); MapWindowPoints(HWND_DESKTOP,(LPPOINT)&rc, 2); TPMPARAMS tpm; tpm.cbSize = sizeof(TPMPARAMS); tpm.rcExclude.top = rc.top; tpm.rcExclude.left = rc.left; tpm.rcExclude.bottom = rc.bottom; tpm.rcExclude.right = rc.right; PostMessage(TB_PRESSBUTTON, 0, TRUE); ::TrackPopupMenuEx(GetSubMenu(m_hMenu, 0), TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_VERTICAL, rc.left, rc.bottom,::GetParent(m_hWnd),&tpm); PostMessage(TB_PRESSBUTTON, 0, FALSE); } Tag: _bstr_t Tag: 270227
  - 18
    - problem with calling mfc dll from #C Hi All, Debug Assertion Failed File dbgheap.c _CrtIsValidHeapPointer() I get the above while trying to CGAL::Intersection(Polygon_2 , Polygon_2,std::back_inserter(...)) in a MFC DLL project (Visual Studio .Net 2003) I call it from C# project. COM server which has been imported in managed code What to do to fix my project? Please Help Thanks Miki Tag: _bstr_t Tag: 270226
  - 19
    - icon changes with change of extension when we change the extension of a file in windows, its icon also changes..... how does windows do tht. in my application i require a similar approach. i want the icon to be dependent on the file extension not on the attributes of the file. i have gone trough the registry but things are not very clear. Windows has listed all the file extensions avaliable there, but there is no general way to extract icons for those extension... kindly help Tag: _bstr_t Tag: 270222
  - 20
    - Windows executable crashing If you have a Windows executable file that is crashing but you don't have the source code, is there any reasonable way to determine why it's crashing? I think there is a buffer overflow for a file path, but I don't know how to prove it. Tag: _bstr_t Tag: 270221
  - 21
    - Why can't it find odbc32.lib? It's there. I have installed VC++ Express and the PSDK. I have successfully migrated VS6.0 workspaces and projects to VCE, and successfully get them to compile from nmake makefiles. Now, I checked in all the .sln and .vcproj files to my version control, alongside the former .dsw and .dsp files. Then I checked out a new sandbox. It won't build over not being able to find odbc32.lib, via nmake. Why not? What can I do to have fresh sandboxes build using nmake? Is there another file I need to commit to version control? Now, if I check out a fresh sandbox and build with the VS6 tools (msdev) it will build fine, and then if I clean everything and build the same sandbox with msbuild it will still build fine. So, something in the VS6 build must "fix" whatever's wrong. Also, if I go to my fresh sandbox and open the project in the IDE it will build fine. Then I go to build the same project via the command line with msbuild and I get the same link error about odbc32.lib. Thanks, JeanneP Tag: _bstr_t Tag: 270210
  - 22
    - How to convert _TCHAR * to string? I need to check command line parameter if (argv[1] == option) .... // option is a string variable And argv is defined as _TCHAR* argv[] by MSVS wizard. The code don't work and it's very hard to convert argv[1] to string. Tag: _bstr_t Tag: 270209
  - 23
    - Converting std::string to System::String* Is there a way to convert std::string to System::String* on Windows XP SP2 with Visual Studio .NET 2003 and with compiler vc 7.1? I saw a possible way to do it but .NET 2005 is required for it: http://msdn2.microsoft.com/en-us/library/ms235631.aspx gcnew doesn't seem to be available for .NET 2003, does anyone know any work around to solve my problem? Thierry Tag: _bstr_t Tag: 270208
  - 24
    - private destructor and templates I have a POD type with a private destructor. There are a whole hierarchy of derived POD types, all meant to be freed using a public member function Destroy in the base class. I get warning C4624. I read the description, decided that it's exactly what I want, and ignored the warning. Now I'm trying to inherit using a template. Instead of "destructor could not be generated because a base class destructor is inaccessible", I now have an error C2248 <name of base destructor> "cannot access private member". Is this correct or a bug? I don't want the compiler to generate a destructor for the base class, I won't declare any variables on the stack and I will use the base Destroy function to deallocate it. /** ** \brief Carries a request and any associated parameters. **/ struct PNPEXPORT IConcurrentOperations::OpRequest abstract : OpMessage { ... private: /** ** \brief Destructor, executes cleanup ** ** Calls FreeAgent to manage reference counting pAgent. ** ** Private visibility prevents declaration on the stack. **/ ~OpRequest() { FreeAgent(); } public: /** ** \brief Frees resources used by this request **/ void Destroy( void ) { delete this; } }; /** ** \param Base, should be derived from OpNotification or OpRequest ** and provide a default constructor. **/ template<typename Base> struct IConcurrentOperations::BufferedMessage : public Base {...} Tag: _bstr_t Tag: 270198
  - 25
    - accessing an array of integers from jscript in a vc++ activex/com Hi there, I am new to using ActiveX and COM and as you can imagine, having a hard time wading through these waters. Hope you will be able to help me. I am trying to pass an array of integers from JScript to an ActiveX/COM dll as well as back to the JScript. I am totally lost as to what I need to be using to achieve this and how - should I be using Variant or IDispatch, etc. I have noticed that when I use IDispatch I am able to properly read the values that I have hardcoded in JScript (eg. arrayElement[0] = 5 ... ) But when I try to populate the array with the values returned it doesnt work. The values returned are of type: VARIANT | VT_BSTR. Heres the code that Im using to return my values : USES_CONVERSION; // For Conversion macros HRESULT hReturn = S_OK; // Return value SAFEARRAY *ptrSafeArray = NULL; // Safe array SAFEARRAYBOUND safeArrayBounds[1]; // Safe array size char ptrBuffer[MAX_STR_LEN]; // Buffer // Fill the safe array bounds safeArrayBounds[0].lLbound = 0; // Lower bound _variant_t vOut; // Number of elements safeArrayBounds[0].cElements = 5; //Create the safe array ptrSafeArray= SafeArrayCreate(VT_VARIANT|VT_BSTR,1,safeArrayBounds); //Populating the array for(long loop = 0; loop < 5; loop++) { switch (loop) {case 1: sprintf(ptrBuffer,"%d",receivedStruct.address[0]); break; case 2: sprintf(ptrBuffer,"%d",receivedStruct.address[1]); break; } // End index switch // Put the element in safe array vOut= A2W(ptrBuffer); hReturn = SafeArrayPutElement(ptrSafeArray, &loop, &vOut) } // Fill the out parameter ptrRetVal->vt = VT_VARIANT | VT_ARRAY| VT_BSTR; ptrRetVal->parray = ptrSafeArray; ======================= And at the JScript end I read this into a VBArray and then convert it to a JScript array using VBArray.toArray() Then when I try to populate the JScript integer array with the returned values and pass it back to the DLL it doesnt seem to recognize them as integers (eg. theAddress = Number(arrayFrmVB[0])) Can you let me know how I should be reading integer arrays from JScript in the DLL and passing them back once I am done processing them ?? Thanks Tag: _bstr_t Tag: 270193
- Next
  - 1
    - Since the program will exit anyway and the array is needed during the whole execution period... Tag: _bstr_t Tag: 270186
  - 2
    - Is it ok not delete dynmical allocated memory in a console program I have a console program. It allocate class C { private: static double * p; ... { ... p = new double [10000]; .... } }; double * C::p; Any issue if I don't delete p[10000] at the end of program? So I needn't have another static method just for delete the array. Tag: _bstr_t Tag: 270184
  - 3
    - msvc++ 2005 template question I have a library which I want to build on msvc++ 2005. however the compiler generates the following warnings and errors concerning the following source snippet: template <class EOT> class eoSelectivePopulator : public eoPopulator<EOT> { public : using eoPopulator< EOT >::src; eoSelectivePopulator(const eoPop<EOT>& _pop, eoPop<EOT>& _dest, eoSelectOne<EOT>& _sel) : eoPopulator<EOT>(_pop, _dest), sel(_sel) { sel.setup(_pop); }; /** the select method actually selects one guy from the src pop */ const EOT& select() { return sel(src); } private: eoSelectOne<EOT>& sel; }; --- output is: eopopulator.h(192) : warning C4346: 'EOT::Fitness' : dependent name is not a type prefix with 'typename' to indicate a type eopopulator.h(205) : see reference to class template instantiation 'eoSelectivePopulator<EOT>' being compiled eopopulator.h(192) : error C2923: 'eoSelectOne' : 'EOT::Fitness' is not a valid template type argument for parameter 'WorthT' eopopulator.h(192) : warning C4346: 'EOT::Fitness' : dependent name is not a type prefix with 'typename' to indicate a type eopopulator.h(192) : error C2923: 'eoSelectOne' : 'EOT::Fitness' is not a valid template type argument for parameter 'WorthT' eopopulator.h(204) : warning C4346: 'EOT::Fitness' : dependent name is not a type prefix with 'typename' to indicate a type eopopulator.h(204) : error C2923: 'eoSelectOne' : 'EOT::Fitness' is not a valid template type argument for parameter 'WorthT' I'm not too familiar with templates and the code looks okay to me. Can someone help me out? Thanks a lot in advance! Oliver Tag: _bstr_t Tag: 270181
  - 4
    - Re: C++ with VS.NET and Twilight of the Microsoft Era Questions have arisen on this and other related newsgroups about the misleading or confusing naming of Microsoft development tools and other curious nomenclatures such as the terms "managed" and "unmanaged".. etc.. The bottom line is that you have to understand the Microsoft is not designing software to make things easy for the developer as they once might have (some time ago) but instead are creating their development environments to manipulate and position everyone to be locked into their proprietary software. In addition, they wish to streamline the process of outsourcing vis a vis the building and managment of their complicated components which have been twisted and tortured into shape for marketing rather than developmental positions. Can anyone forget OLE and COM and the great hype that Microsoft gave us versus the MESS that was involved when you tried to use them? Their goal remains the same - control of Internet applications, a subset of their goal of "control of the desktop". In this they have partly failed, much to their chagrin, because Java persists and there are major new ways to make desktop apps Internet aware - for example the remarkable Ajax, in addition to the gravest threat of all - Linux, which, despite all of its shortcommings, has the advantage of an active and open development community which means that each month that goes by Linux is catching up to, and probably already has surpassed, anythiing that Vista may offer. Microsoft has made a major strategical error in not updating the Windows File system to that promised for the new Vista operating system and this was a critical error which gives a major strategic opportunity to switch to alternative systems. Many IT managers, understandably tired of their desktop applications' software developers being unable to create everything they needed, foolishly took the short term solution of replacing everything in a giant database - this was the trend at least a few years ago, with the double failure that their IT budgets are now drowning in red ink to pay for the Oracle or whatever database, the server, the maintenance expenses and staff and they have everything locked into this which means in a few years they will have to expensively upgrade or else switch to a new system. Instead, the answer is to take this historic opportunity to break away from the expensive licensing fees and lock-in typical of Microsoft envrioronments and seek an alternative solution (yes, Linux!!) before Vista establishes itself worldwide and an entire generation of companies is again locked into the same old straightjacket. Yes, Linux can be tricky to work with - but much has changed and as I mentioned, every month a worldwide group of developers is improving and fine tunning Linux so that it has long since passed the point where it is appropos for business to use. At the very least, take a spare computer and put in a Suse 10.1 or Fedora distro and try it out - I believe you and your programmers will be rewarded. Are there some bugs or problems with LInux - Yes of course there are but XP and all operating systems have them too (for example, I have on my XP desktop a folder with some files in it which will not allow itself to be deleted, even though I am the administrator and even though I tried to remove the "read only" check mark from this file; this is on a fully updated windows xp professional desktop and Microsoft still has not fixed this bug, probably have not even acknowledged it). The end result is that YOU will now control your corporate, business, scientific and personal software - YOU will control the budget, YOU will not be forced to pay for "extra" information that should have been included with the operating system or the developement software in the first place. I know it is a difficult - even risky choice, but not is the time. Those braindead managers who perisist in automatically choosing Microsoft products and development systems will earn their just rewards as they gradually are outdistanced by managers of companies who are more agile, more creative, more intelligent and better able to adjust to rapid changes in markets and envrionments. GET BACK IN CONTROL. AVOID VISTA!!!!!!!! Jimserac James Pannozzi (former Windows Developer) Tag: _bstr_t Tag: 270177
  - 5
    - C++ with VS.NET Simple question: Can you use Visual Studio.NET 2003/2005 to write and compile "regular" C++ assemblies aka NOT C++.NET assemblies (DLLs to be more specific). If not, what is the newest envionment for this (from Microsoft and Borland)? /Aidal Tag: _bstr_t Tag: 270171
  - 6
    - status bar If a window has a status bar at the bottom, how does one normally change the text in it? Thanks. Tag: _bstr_t Tag: 270154
  - 7
    - Tabstop problems in MFC/CLR C++ application Ok, I've got an MFC/CLR hybrid application (don't ask). It has two main forms, the MFC form, and the CLR form. Both of these forms can be open at the same time and the user can switch between them at will. Everything works just fine on the MFC form but on the .NET/CLR form, tabstops do not work at all. You have to use the mouse to click between fields on the form. Any ideas why? Tabstop is set to true and the TabOrder is correct but pressing tab while on the CLR form does nothing. I've done several searches but couldn't find an answer to my question. Thanks for your help. Tag: _bstr_t Tag: 270153
  - 8
    - Exception Handling Hi, I'm trying to test a concept of global TRY CATCH in my service... basically as it starts I create one object and call a function to handle the functionality of the service. Sometimes there are crashes and not exactly sure where they come from... of course the source of the problem should be fixed... but we must avoid ugly GPFs to the users. So that's why thinking of a global TRY/CATCH...Is this a valid approach ? I was doing some experiment, but I can't even get a simple exception to catch... any ideas ? here's the simple test code below... and in the project settings I do have exception handling enabled. THANKS !! //cause test crash try { char *p = 0; cout << strlen(p) << '\n'; //this will cause GPF } catch(...) { //does not get here for some reason... } Tag: _bstr_t Tag: 270149
  - 9
    - Using mapi to access different logon users? Is this possible? I have code to access the default/currently logged on user. But i dont see anyway to access the other users on the system. I'm not talking about identities. I'm talking about actual computer users. I have to do it with both MS outlook and Outlook Express. But for now i just need to get MS OL working. The code checks the registry to see first if it's the defualt e-mail client, if not it does another check through the registry to find it. At no point through this does it try to access the file/directory (C:\Documents And Settings\"username"), or anything similar. I've been searching and have come up with nothing even remotely close. So if someone could help i would greatly appreciate it! A example or even some pointers/keywords to search for would even help. Tag: _bstr_t Tag: 270146
  - 10
    - c++ program does not run from server drive Hi I succesfully finished a simple form program in VC express 2005. I tested the program in another machine, after installing the runtime libraries and .NET framework 2, and is working fine. Now' i'd like to make the program available from the network server drive to other users (after they install the runtime and .net framework in their machines). But the copied .exe does not start from the server drive, resulting in an error screen before executing the program (it does it either from the local development computer or from the other machine). The error message doen't tell anything. any suggestion how to fix this? thank you Marcos Tag: _bstr_t Tag: 270144
  - 11
    - c++ program does not run from server drive Hi I succesfully finished a simple form program in VC express 2005. I tested the program in another machine, after installing the runtime libraries and .NET framework 2, and is working fine. Now' i'd like to make the program available from the network server drive to other users (after they install the runtime and .net framework in their machines). But the copied .exe does not start from the server drive, resulting in an error screen before executing the program (it does it either from the development computer or from the other machine). any suggestion how to fix this? thank you Marcos Tag: _bstr_t Tag: 270139
  - 12
    - serial communications What is the easiest way to do serial communications in VC++? Thank you. Tag: _bstr_t Tag: 270137
  - 13
    - CWindow::Create Failure Hi there, I have a class derived from CWindowImpl and I am handling the WM_CREATE message via a message handler and map. ----------- BEGIN_MSG_MAP(CMyWindow) MESSAGE_HANDLER(WM_CREATE, OnCreate) END_MSG_MAP() LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/); LRESULT CFlashView::OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/) { #if FLASH cWndChildWindow = CWindow::Create(WC_MYWINDOWCLASS, m_hWnd, NULL, NULL, WS_CHILD); cWndChildWindow.ShowWindow(SW_SHOW); #endif return(0); } ----------- In the OnCreate method I would like to create an instance of a child window that needs to be displayed in this window. But for some reason I am greeted with an Assertion Failure with the expression m_hWnd == 0 ... ATLASSUME(m_hWnd == NULL) Now is this telling me that m_hWnd needs to be 0? or can't be 0? m_hWnd is the handle to CMyWindow and at this point it should have been created right? This is really confusing me, if I pass 0 to the method it continues but then fails on the next line as CWndChildWindow was never created. cWndChildWindow is a CWindow object. Any help would be greatly appreciated! Thanks for your time in advance. Nick. Tag: _bstr_t Tag: 270136
  - 14
    - Problem where msvc-8.0 includes msvc-6.0 headers Hello! I've just downloaded Visual C++ 2005 Express and the platform sdk. I also applied the changes to VCProjectEngine.Dll.Express.Config explained here [1]. But, I am unable to compile anything that imports msxml3, for example, this little program: #import <msxml3.dll> named_guids #include <msxml.h> int main() { MSXML2::IXMLDOMNodePtr m_xmlnode; MSXML2::IXMLDOMDocumentPtr m_xmldoc; m_xmldoc.CreateInstance(MSXML2::CLSID_DOMDocument); return 0; } This causes a compilation error. It seems the 8.0 compiler is including headers for the 6.0 compiler: main.cpp C:\Program Files\Microsoft Visual Studio\VC98\include\ocidl.h(4675) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int What am I missing? Thanks in advance! [1] http://msdn.microsoft.com/vstudio/express/visualc/usingpsdk/ -- Daniel A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? Tag: _bstr_t Tag: 270122
  - 15
    - Wht is Environment variable? and it's use I have this question for long time! Could anyone clear my doubt! 1. What is Environment variables and why it should set? 2. How to set Environement variable for vc compiler and how to program VC in notepad with this set up rgds, Rajan Tag: _bstr_t Tag: 270118
  - 16
    - CBitmap alignment issue Hi folks, I am trying to use CBitmap and HBITMAP to display 24bpp images in my Windows Mobile 5.0 application. Everything works fine as long as my image is aligned on 4 bytes. Now not all images are like that. I tried the following: ****************************************************************** // get a buffer with 4-bytes aligned pixels unsigned char* pBits = extractPixelDataAlignedBytes( ); // create a CBitmap CBitmap* pBmp = new CBitmap(); pBmp->CreateBitmap(iWidth, iHeight, nPlanes, nBitcount, (const void*) pBits) ) // Display image in CView::OnDraw() { ... HBITMAP hBmp = (HBITMAP)*pBmp; if( hBmp ) { CRect rcClient; GetClientRect(&rcClient); dcMem.CreateCompatibleDC(NULL); dcMem.SelectObject(hBmp); pDC->StretchBlt(rcClient.left, rcClient.top, rcClient.right, rcClient.bottom, &dcMem, 0, 0, BmpWidth, BmpHeight, SRCCOPY); } } ********************************************************************* The image is not displayed properly when I need to add 2 or 3 bytes at the end of each line to be aligned on 4-bytes. That works when I need to add 1 byte to be aligned on 4-bytes... Did I miss something? Is what I want to do possible with CBitmap object or do I need to use a DIB object? (if not CBitmap are useless) Thanks in advance -- ST --------------------------- stopin@nospam.nospam Tag: _bstr_t Tag: 270117
  - 17
    - Help Please can anybody tell me the name of ".NET Framework Newsgroup". Thank you all +++++++++++++++++++++++++++++++++++++ Tag: _bstr_t Tag: 270115
  - 18
    - determine, using an API, whether Vista is 32 bit or 64 bit Hi All, Could anybody tell me how to determine, using API or APIs, whether my Windows vista OS is 32 bit or 64 bit? Thanks, Shaji Tag: _bstr_t Tag: 270113
  - 19
    - Displaying Window Icons in Listbox. i want to display local files and directories in a list box in my program. i am able to retrieve tht but i want to display respective icons against the file name. File extensions can be retrieved using GetExtension in mfc. i want to display the icons using Windows, NOT create my own bitmaps. kindly suggest how to go about it. Tag: _bstr_t Tag: 270107
  - 20
    - What is .pch file and it's importance? Pals, I wanna get clear idea about PreCompiledHeader file .pch in VC++ and what is it's importance? When it should be built??.... Regards, Rajan Tag: _bstr_t Tag: 270106
  - 21
    - GetNumberFormat() failure Hello, GetNumberFormat() is failing. It's not displaying a value. lpValue consists of "". The NumFormat values are NumDigits=3 LeadingZero=1 Grouping=3 lpDecimalSep="." lpThousandSep"," NegativeOrder=1 The Value is ="0.001" Code: GetNumberFormat( ::GetThreadLocale(), NULL, Value, &numFormat, lpValue, _countof(lpValue) ); GetLastError() returns 87 which means that a parameter is incorrect. I think all my parameters are correct. If I change the Value to 1234.5, it works just fine. Any help is appreciated. Tag: _bstr_t Tag: 270101
  - 22
    - Dynamic resizing Hi, I have an ATL control used to display text. The control lives inside a CRichEditControl. The problem is that the application needs to resize the control to fit the text. O solution I adopted is to call FieViewChange() inside of OnDraw, after I calculate the text extent using DC passed as parameter (CDC::GetTextExtent). This allows the control to be redrawn inside the boundaries I specify in the prev call of OnDraw. So: CMyComControl::OnDraw(...) { .... CRect rcTextSize = pDC->GetTextExtent( strText, nChars ); if( m_sizeNatural != rcTextSize ) { m_sizeNatural = rcTextSize + some margins FireViewChange(); //this will alow OnDraw to be called with correct margins } .... } However in some specific situations the application crashes. I couldn't figure out why, but I discovered that removing FireViewChange() from OnDraw solves the crash. I believe that calling FireViewChange() inside OnDraw() may be tricky, but this was the only way I could find to calculate m_sizeNatural function of text extent (DC dependent). Is there any other solutions to my problem? Any comments on this are welcomed. Thanks Tag: _bstr_t Tag: 270100
  - 23
    - OllyDbg used to debug VC2005 applications? Hello all, OllyDbg is a great debugger, but.. is there any way to show symbols instead of addresses in OllyDbg, for VC2005-compiled programs (link time code generation preferably)? I'm tired to take a look at the MAP file every second. :P I use VC2005 only minimally, i.e. command line and without standard libraries, all of my VC2005 is few MB's big and fits nicely, together will all my sources and stuff, into an USB pen. So please do not ask me to use the VC2005 debugger, my USB Pen is not 20GB big and I cannot install stuff anyway into others' PC. Running cl.exe and OllyDbg.exe without installation is so much nicer.. :) About the symbols, can OllyDbg show them or is it limited to OS symbols only (which, I admit, mine doesn't show either. How do I it?). Thanks! Mario Tag: _bstr_t Tag: 270096
  - 24
    - executing a member function in a separate thread hello everybody !! my new problem is that i have a class that contain a some functions and some variables i want to execute one of these functions in a separate thread using AfxBeginThread(...); and FYI this function uses some member variables of the class to do it's work any idea ??? thnx 4 ur time and concern a.hemdan Tag: _bstr_t Tag: 270083
  - 25
    - change color of list control Hi, I am trying to change the color of list control when user move mouse over it. Suppose listcontrol has 3 columns. When user left click the mouse and move it over text then i am selecting the text. I am taking mouse coordinates and using PATBLT function to change the color. But it's not working fine. Some text is select and some not. Folowing is the code. in mouse move CClientDC dc(this); dc.PatBlt(rect.left, rect.top, rect.right-rect.left, rect.bottom-tect.top,DSTINVERT); where rect contains rect.left=previous mouse point.x rect.top=previous mouse point.y rect.right=current mouse point.x rect.bottom=currentmouse point.y in last parameter of PatBlt i am using DSTINVERT or PATINVERT. If i use PATCOPY then user can't see the text in list control. at the end of mouse move function i store its current point to previous point. Text is not selected in proper way because DSTINVERT/PATINVERT creating the problems because i think they are called more than time for any point. Can someone tell me how to improve that. Tag: _bstr_t Tag: 270082

Whenever, I look at a _bstr_t in the VC++ 6.0 debugger, it only shows
part of it and indicates that there is more by placing "{1}" at the
end. Anyone know how to see all of a _bstr_t in the debugger?

Top

Re: _bstr_t by Alex

Alex
Fri Oct 20 15:27:36 CDT 2006

<mike7411@gmail.com> wrote:
> Whenever, I look at a _bstr_t in the VC++ 6.0 debugger, it
> only shows
> part of it and indicates that there is more by placing
> "{1}" at the
> end. Anyone know how to see all of a _bstr_t in the
> debugger?

This is problem of debugger, not of _bstr_t. VC6 debugger
truncates long strings, so the only way to see real data is
to open Memory window and see it there. I remeber there was
some plug-in for VC6, which displayed strings fully in
debugger. Search in www.codeproject.com.

HTH
Alex

Top

Re: _bstr_t by Tim

Tim
Sat Oct 21 20:36:02 CDT 2006

mike7411@gmail.com wrote:
>
>Whenever, I look at a _bstr_t in the VC++ 6.0 debugger, it only shows
>part of it and indicates that there is more by placing "{1}" at the
>end. Anyone know how to see all of a _bstr_t in the debugger?

Yes. Get rid of your 8-year-old compiler/debugger and move on to something
more modern. This works properly in Visual Studio 2005.
--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.

Top