COM trouble

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
    - STL question - why does this code crash? #include <vector> #include <set> using namespace std; class c { public: c() {}; virtual ~c() {}; }; class h : public vector<c> { public: h(); virtual ~h() {}; }; int _tmain(int argc, _TCHAR* argv[]) { set<h> myset; return 0; } it crashes when trying to construct the set, citing 'Stack around the variable _Hk was corrupted' on line 456 of xtree. Any idea what's wrong? Tag: COM trouble Tag: 274562
  - 2
    - get the length of a file Hi, I am opening a file using "fopen" function. How can I know the file length ? Yoav. Tag: COM trouble Tag: 274556
  - 3
    - SendInput lose data Hello everybody, I'm writing an "Word-macro"-like application. I would like to allow a user to store a sequence of key presses and mouse movements and to send them on command to a specified software. I need to send mouse movements too because I want to be able to draw on graphical area of applications like Paint or Photoshop. My program uses SendInput to transmit key presses and mouse movements to Windows. Unfortunately, I'm loosing some of my data. For sample, I send "Middle Button Down", then "Mouse Move", then "Middle Button Up". >From time to time, one of these is not received by the target software. I'm using nothing more than this : INPUT input; ZeroMemory( &input, sizeof(INPUT) ); input.type = INPUT_MOUSE; input.mi.dx = sourceX; input.mi.dy = sourceY; input.mi.mouseData = 0; input.mi.dwFlags = MOUSEEVENTF_MOVE; input.mi.time = 0; input.mi.dwExtraInfo = 0; SendInput( 1, &input, sizeof( INPUT )); or this : input[ i ].type = INPUT_KEYBOARD; input[ i ].ki.wVk = id_to_send; input[ i ].ki.wScan = 0; input[ i ].ki.dwFlags = KEYEVENTF_KEYUP; input[ i ].ki.time = 0; input[ i ].ki.dwExtraInfo = 0; SendInput( 1, &input, sizeof( INPUT )); Does anyone know why some if these sendings are lost by Windows ? Tag: COM trouble Tag: 274547
  - 4
    - WCHAR ::GetCurrentDirectoryA( MAX_PATH, (LPSTR) sNewPath ); strcat ((char *)sNewPath, "\\data"); strcat ((char *)sNewPath, (const char *)wszTexName); are there any more reliable way of doing this? I want to give up on "strcat" but what about any good sub? Thanks Tag: COM trouble Tag: 274542
  - 5
    - How to get current directory? Hi, I'd like to know what is the handiest way to get the current directory of the application? Thank in advance Tag: COM trouble Tag: 274538
  - 6
    - How to convert from string to char*? hi, i have two questions: 1. How to convert from string to char*? I use c_str() of string, but it returns "const char*" instead of char*; 2. When i use copy() function of string, i always get some unknown characters from the first parameter (char*) after using copy() function.(these unknow character is like "<<" or ">>", but my string doesn't include these characters.) could anybody tell me how to resolve it , thanks. Lorry Tag: COM trouble Tag: 274533
  - 7
    - Back button I was just wondering if there is a Back button in Visual C++ 6.0. For instance, if you do a "Go to Definition", the "Back" button would take you back. I can't seem to find it. Thank you. Tag: COM trouble Tag: 274520
  - 8
    - Europe Tests Established Chemicals on Millions of Animals Tony Nottingham England 27 February 2007 TO: All People Who Care A new European Chemical Testing Policy called REACH has now been finalised by the European Union. Under these proposals Chemicals of every kind - from those used in industrial processes to the ingredients of consumer products - will be tested on Millions of animals from mice to fish to dogs, causing untold suffering. Still worse, because of this reliance on outdated animal techniques, reliable and relevant information will not be provided and our safety will not be assured. If you believe that REACH should make more use of Alternative Testing to test 1000s of Chemicals that have been in general use since before 1985 then please take action now. If you are a European citizen please contact your local papers and own MEP asking them to promote the development of humane non-animal testing methods under the REACH legislation, which is the best hope we have for sparing animals the misery of a testing laboratory. A sample letter can be found at the BUAV (British Union for the Abolition of Vivisection) website at www.BUAV.org (Select Campaigns, Chemical Testing, Get Active then Writing to the local press). For all Non-European members, you can still help. Please tell all your colleagues and friends in the UK and Europe about REACH. Write to your own local papers to try and inform others about what is going on in Europe. The website for the European Parliament is http://www.europarl.europa.eu. Information on REACH, the New European Chemical Testing Policy can be found here. Everyone can help and you can make a difference. Thank You Tag: COM trouble Tag: 274519
  - 9
    - MI5 Persecution: Troubling Censorship Issues 20/8/95 (3527) Fred Read (postmaster@foxhouse.demon.co.uk) wrote: : He posts this drivel every week or so to a number of groups that : I subscribe to and nothing seems to stop him. *ALL* of his posts : are off topic and unwelcome to the groups he posts to. : We have complained about him to his postmaster on at least four : previous occasions and he still posts the same crap. As his SP : seem unwilling, or unable, to do anything about him, we were : windering if there was anything you could do? If he is not actively using tactics to avoid or sabotage killfiles (posting from various systems, forging, massive crossposting to create cross-newsgroup flame wars) then it should be quite easy to killfile him. It does seem that the frequency and the size of his posts are approaching net abuse. However, IMHO, they aren't quite there yet. If his postmaster were to act in this instance, it would raise troubling censorship issues. -- Karen Lofstrom lofstrom@lava.net --------------------------------------------------------------------- "Adventures for those of the inadmissable kind, with no follow through." --- a flaming bonzo beckwithian idiot 3527 Tag: COM trouble Tag: 274518
  - 10
    - error C2660: function does not take 0 arguments hello.. i cant' rootcause this.... here is part of my code (there is more code following, but i don't think it affects): void _corrupts(const vector<vector<bool> >& cyclades, const int vertex, vector<int>& visited, const int& N) { vector<int> tovisit; for (int i=0; i<cyclades[vertex].size(); i++) if (cyclades[vertex][i]) tovisit.push_back(cyclades[vertex][i]); if (!in(vertex, visited)) visited.push_back(vertex); for (int i=0; i<tovisit.size(); i++) if (!in(tovisit[i], visited)) _corrupts(cyclades, tovisit[i], visited, N); } bool corrupts(const vector<vector<bool> >& cyclades, const int vertex, vector<int>& visited, const int& N) { _corrupts(const vector<vector<bool> >& cyclades, const int vertex, vector<int>& visited, const int& N); //line 31 if (visited.size() != N) return true; return false; } in _corrupts, a function in is used, and defined as following: bool in(const int& vertex, const vector<int>& visited); i get 3 errors: reversedelete.cpp(31) : error C2143: syntax error : missing ')' before 'const' reversedelete.cpp(31) : error C2660: '_corrupts' : function does not take 0 arguments reversedelete.cpp(31) : error C2059: syntax error : ')' could you please help me? Tag: COM trouble Tag: 274514
  - 11
    - MI5 Persecution: Stand up for Free Speech 14/8/95 (872) From: rji@cheetah.inmos.co.uk (Richard Ingram) Newsgroups: uk.misc Date: Mon Aug 14 10:08:32 1995 Some cencorship loving bore wrote : > In article <GEVANS.95Aug14094119@mvagusta.uk.tele.nokia.fi> gevans@mvagusta.uk.tele.nokia.fi (Gareth Evans) writes: > > His sysadmin is also next to useless, and has not replied to my request or > even acknowledged it. Maybe this person *is* a sysadmin? > > He's not. It seems the public access site he uses has got no proper > management over its users. Here's a copy of a reply I got from a > complaint I made. [After returning every one of Corley's postings to [snip a large pile of winging complaining drivel] Geez what a bunch of tossers you all are - you don't like someones postings so you try and get him evicted from the net, why not just use a kill file - you DONT have to read his posts/threads now do you ? Why is it the net is getting populated by the biggest bunch of self absorbed little Hitlers ? You don't like someones posts so you bloody complain or mail bomb them - grow up you bunch of fucking sad gits ! Richard. 872 Tag: COM trouble Tag: 274511
  - 12
    - unicode characters on console? How can I print unicode characters (e.g. specifically, the 'suit' symbols, i.e. hearts clubs diamonds spades), to the console? I've tried every possible manipulation of wchar_t I can think of and nothing will work. To make it worse, VB.NET can do it - so I know it's not a limitation of the console. How can I do this in (unmanaged) C++? Thanks Tag: COM trouble Tag: 274510
  - 13
    - Compiler warning This warning is apparently not causing a problem but I like to understand the warnings so I can look for potential problems. Not quite sure why this one occurs. Thanks, jh c:\program files\microsoft visual studio\vc98\include\utility(21) : warning C4786: 'std::pair<std::deque<unsigned char,std::allocator<unsigned char> >::const_iterator,std::deque<unsigned char,std::allocator<unsigned char> >::const_iterator>::pair<st d::deque<unsigned char,std::allocator<unsigned char> >::const_iterator,std::deque<unsigned char,std::allocator<unsigned char> >::const_iterator>' : identifier was truncated to '255' characters in the debug information #include "dvGPS.h" int getSentence(const char cStart, const char cStop, char* sentence) { char c; deque<char> charDeque(0); while((c = getByte()) != cStart) { //Do nothing but toss it. cout << c << endl; } cout << "//Collect characters." << endl; do { charDeque.push_back(c); cout << c << endl; cout << hex << (unsigned short)c << endl; }while((c = getByte()) != cStop); charDeque.push_back(c); charDeque.push_back('\0'); copy(charDeque.begin(), charDeque.end(), sentence); return charDeque.size() -1; } Tag: COM trouble Tag: 274506
  - 14
    - How can I run '.sql' script from vc++ Hi, Somebody please help me how can i rum a .sql file from vc++. Iam using MFC with MySQL as backend. Tag: COM trouble Tag: 274504
  - 15
    - Side-by-Side hell with Visual Studio 2005 SP1 Hi, I'm having problems after installing VS 2005 SP1 with side-by-side with VC++ dlls. I'm getting the error 0xc0150002 when trying to register an ATL/MFC dll in a computer without last version of VC++ dlls installed on WinSXS. It's easy to reproduce. I have created an ATL project with VS wizard, and I added the option of support MFC. In my computer with VS 2005 SP1 installed it can be registered without any problem. Now I copy the dll to a computer with VS 2005 without SP1, or to a computer with previous version of VC redistributables (8.0.50727.42). I copy also to the same directory the new VC dlls (8.0.50727.762). If i try to load or register the dll it gives me the error 0xc0150002. If I open the dll with Dependecy Walker the programs gives me the same error. But the VC dlls copied to the directory are in the list of loaded modules. The manifest file is embeded in the dll and seems to refer to the correct version dlls: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC80.DebugCRT" version="8.0.50727.762" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity> </dependentAssembly> </dependency> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC80.DebugMFC" version="8.0.50727.762" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity> </dependentAssembly> </dependency> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC80.ATL" version="8.0.50727.762" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity> </dependentAssembly> </dependency> </assembly> I have tried to put the manifest file in the same forlder but same problem. I have created an MFC application an it does not have this problem. I have created a MFC dll and it does not have this problem. But if I add to this dll an include to <atlbase.h>, the error appears. Any idea? Thanks Tag: COM trouble Tag: 274502
  - 16
    - bison and flex in visual stdio 2005 want use bison and flex in visual stdio 2005 for make small compiler by use Custom Build Rules in Visual C++ 2005 "FlexBison.rules file " but when i compile "example.y" i get error ---------------------------------------------------------------------------= =AD--------------- bison.simple: No such file or directory bison: Project : error PRJ0019: A tool returned an error code from bison Project : error PRJ0002 : Error result 1 returned from 'C:\WINDOWS \system32\cmd.exe'. Build log was saved at "file://c:\Documents and Settings \sharif.SYNRYU \My Documents\Visual Studio 2005\Projects\example\example\Debug \BuildLog.htm" example - 1 error(s), 0 warning(s) =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Build: 0 succeeded, 1 failed, 0 up-to-date, = 0 skipped =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D ---------------------------------------------------------------------------= =AD----------------------- my question is where i will put "bison.exe , bison.simple , flex.exe" files for use in cv++ 2005 plz help me Tag: COM trouble Tag: 274501
  - 17
    - Why does this compile with VC++? class A { public: A(int) { } private: A(const A &); A &operator=(const A &); }; A foo() { return A(0); } void bar() { A a = foo(); } Even though the compiler may optimize out the call to the copy constructor, it should still respect the fact that it is declared private. From the C++ standard: "Even when the creation of the temporary object is avoided, all the semantic restrictions must be respected as if the temporary object was created." Tag: COM trouble Tag: 274491
  - 18
    - How to use DirectShow to convert from AVI to MPG1 Hi: I have some video files ,I want to convert some avi file to MPG1 files use DirectShow. I tried to use code as : pBuilder->SetOutputFileName(&MEDIASUBTYPE_MPEG1System, T2W(szOutFilename), &pMux, &pWriter);//this function return "not found register class". I need your help,can you give me some demo code? Thank you in advance. Tag: COM trouble Tag: 274479
  - 19
    - identifier not found error, undeclared identifier Hi, I have this code that I am trying to compile, but I am getting the following errors 'CoInitializeSecurity': identifier not found 'EOAC_NONE' : undeclared identifier I have pasted the code below: #include "stdafx.h" #include "wbemidl.h" #include <comdef.h> #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif void OnButtonGetinfo() { CoInitialize(NULL); if(CoInitializeSecurity( NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_PKT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, 0) != S_OK) return; IWbemLocator * pIWbemLocator = NULL; IWbemServices * pWbemServices = NULL; IEnumWbemClassObject * pEnumObject = NULL; BSTR bstrNamespace = (L"root\\cimv2"); if(CoCreateInstance ( CLSID_WbemAdministrativeLocator, NULL , CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER , IID_IUnknown , ( void ** ) & pIWbemLocator ) != S_OK) return; if(pIWbemLocator->ConnectServer( bstrNamespace, // Namespace NULL, // Userid NULL, // PW NULL, // Locale 0, // flags NULL, // Authority NULL, // Context &pWbemServices ) != S_OK) return; HRESULT hRes; BSTR strQuery = (L"SELECT * FROM Win32_OperatingSystem"); BSTR strQL = (L"WQL"); hRes = pWbemServices- >ExecQuery(strQL,strQuery,WBEM_FLAG_RETURN_IMMEDIATELY,NULL,&pEnumObject); if(hRes != S_OK) { printf("Could not execute Query"); return; } ULONG uCount = 1, uReturned; IWbemClassObject * pClassObject = NULL; hRes = pEnumObject->Reset(); if(hRes != S_OK) { printf("Could not Enumerate"); return; } hRes = pEnumObject->Next(WBEM_INFINITE,uCount, &pClassObject, &uReturned); if(hRes != S_OK) { printf("Could not Enumerate"); return; } VARIANT v1; BSTR strClassProp = SysAllocString(L"NumberOfProcesses"); hRes = pClassObject->Get(strClassProp, 0, &v1, 0, 0); if(hRes != S_OK) { printf("Could not Get Value"); return; } SysFreeString(strClassProp); _bstr_t bstrPath = &v1; //Just to convert BSTR to ANSI char* strPath=(char*)bstrPath; if (SUCCEEDED(hRes)) printf(strPath); else printf("Error in getting object"); VariantClear( &v1 ); pIWbemLocator->Release(); pWbemServices->Release(); pEnumObject->Release(); pClassObject->Release(); CoUninitialize(); } int _tmain(int argc, _TCHAR* argv[]) { OnButtonGetinfo(); return 0; } Any help I can get is greatly appreciated. Thank you Tag: COM trouble Tag: 274469
  - 20
    - MS Visual C++ Professional Edition/ Academic Version I am running Windows XP, Home Edition 5.1 (sp2) on a GenuineIntel Processor (512 MHz, 256 MB RAM). Just when I though I understood (wishful thinking) the myriad of flavors of MS Visual C++, version 6, I now see MSVC++ Professional Edition - Academic Version. My question is, what is the academic version of the professional edition? Does it lack some of the functionality of the regular professional edition. I have been messing with the Express Edition and am wanting to avoid getting anything similar. I like the MFC AppWizard in the Professional (and I think standard) edition. You make a menu item and then R-Click, choose ClassWizard and bingo - you're adding code for your event handler. With the Express Edition, you right click and there is nothing related to an event handler. Just a lot of stuff to make the item prettier. I eventually got an event handler but it was in the .h file. To sum it up, if I want the AppWizard capability (and MFC) associated with the professional edition, would the academic version work? Many thanks in advance, Peter. Tag: COM trouble Tag: 274466
  - 21
    - error LNK2001: unresolved external symbol "extern "C" ... Hi! How can I fix this error? Error 1 error LNK2001: unresolved external symbol "extern "C" long __stdcall SHFlushClipboard(void)" (?SHFlushClipboard@@$$J10YGJXZ) UnmanagedTest.obj Basically I am calling the SHFlushClipboard method from "shlobj.h" (Win32) in a managed c++ app. ~Matt Tag: COM trouble Tag: 274450
  - 22
    - characteristics of boost's shared pointers? What does this container do? Thanks Jack Tag: COM trouble Tag: 274444
  - 23
    - How to catch this error Access Violation I have a crash; I know that crash is in the following code 0012d300 12d75f49 OLEAUT32!VariantClear+0xb1 It is because the VariantClear tries to release a COM Object that is not long valid. Because I did not know how to prevent this error from happening,, (Please see http://groups.google.com/group/microsoft.public.dotnet.framework.clr/browse_thread/thread/4ea4df87b0f2e13c/87efbc010c5ab61a?hl=en#87efbc010c5ab61a if you want to know why) The only option I have now is to catch the error (Access Violation), but it looks like the system create a endless loop on the following code 0012cf58 7c90e96c ntdll!KiFastSystemCallRet 0012cf5c 7c91e7d3 ntdll!NtUnmapViewOfSection+0xc 0012d04c 7c80abf7 ntdll!LdrUnloadDll+0x31a 0012d060 77513442 kernel32!FreeLibrary+0x3f 0012d06c 77513456 ole32! CClassCache::CDllPathEntry::CFinishObject::Finish+0x2f 0012d080 775135fe ole32!CClassCache::CFinishComposite::Finish+0x1d It ran the above code again and again, even I have SEH in 0012d654 12d788f1 AppContainer!CPropertyContainer::RemoveMapObject +0x1c5, the error never returned to my SEH Would anyone please show me how to catch this particular error? Thanks in advance. John the stack trace is as following, 0:000> kL 200 ChildEBP RetAddr 0012cf58 7c90e96c ntdll!KiFastSystemCallRet 0012cf5c 7c91e7d3 ntdll!NtUnmapViewOfSection+0xc 0012d04c 7c80abf7 ntdll!LdrUnloadDll+0x31a 0012d060 77513442 kernel32!FreeLibrary+0x3f 0012d06c 77513456 ole32! CClassCache::CDllPathEntry::CFinishObject::Finish+0x2f 0012d080 775135fe ole32!CClassCache::CFinishComposite::Finish+0x1d 0012d228 77513578 ole32!CClassCache::FreeUnused+0x19d 0012d238 775133a2 ole32!CoFreeUnusedLibrariesEx+0x36 0012d244 6605a01e ole32!CoFreeUnusedLibraries+0x9 0012d258 6605b4d1 MSVBVM60!CCreDestroyCtlStruct+0x387 0012d27c 6601c56a MSVBVM60!CCreDestroyCtl+0x195 0012d2c0 6601bc56 MSVBVM60!CCreFUnloadForm+0x1c9 0012d2cc 660c9ed5 MSVBVM60!CUnkDesk::Release+0x23 0012d2e4 6600e720 MSVBVM60!BASIC_CLASS::PRIVATE_UNKNOWN::Release+0x11c 0012d2ec 77124918 MSVBVM60!SCM_MsoStdCompMgr::Release+0xd 0012d300 12d75f49 OLEAUT32!VariantClear+0xb1 0012d35c 12d715d4 AppContainer!_variant_t::~_variant_t+0x29 0012d3c0 12d74b25 AppContainer!std::pair<_bstr_t const ,_variant_t>::~pair<_bstr_t const ,_variant_t>+0x44 0012d418 12d749b2 AppContainer!std::pair<_bstr_t const ,_variant_t>::`scalar deleting destructor'+0x25 0012d470 12d73d46 AppContainer!std::_Destroy+0x22 0012d4cc 12d72cb5 AppContainer!std::_Tree<_bstr_t,std::pair<_bstr_t const ,_variant_t>,std::map<_bstr_t,_variant_t,std::less<_bstr_t>,std::allocator<_variant_t> >::_Kfn,std::less<_bstr_t>,std::allocator<_variant_t> >::_Destval+0x26 0012d550 12d78e2d AppContainer!std::_Tree<_bstr_t,std::pair<_bstr_t const ,_variant_t>,std::map<_bstr_t,_variant_t,std::less<_bstr_t>,std::allocator<_variant_t> >::_Kfn,std::less<_bstr_t>,std::allocator<_variant_t> >::erase+0x825 0012d5b0 12d78af5 AppContainer! std::map<_bstr_t,_variant_t,std::less<_bstr_t>,std::allocator<_variant_t> >::erase+0x2d 0012d654 12d788f1 AppContainer!CPropertyContainer::RemoveMapObject +0x1c5 0012d6b8 12d796b0 AppContainer!CPropertyContainer::~CPropertyContainer +0x41 0012d71c 12d77335 AppContainer! ATL::CComObject<CPropertyContainer>::~CComObject<CPropertyContainer> +0x70 0012d774 12d79758 AppContainer! ATL::CComObject<CPropertyContainer>::`scalar deleting destructor'+0x25 0012d7dc 79e8dbde AppContainer! ATL::CComObject<CPropertyContainer>::Release+0x48 0012d830 79e8db4a mscorwks!ReleaseTransitionHelper+0x5f 0012d878 79e8dac5 mscorwks!SafeReleaseHelper+0x89 0012d8ac 79f27983 mscorwks!SafeRelease+0x2f 0012d8c4 79f2792e mscorwks!RCW::ReleaseAllInterfaces+0x49 0012d8f4 79f279dc mscorwks!RCW::ReleaseAllInterfacesCallBack+0xbd 0012d924 79f279b0 mscorwks!RCW::Cleanup+0x22 0012d92c 79f27997 mscorwks!RCWCleanupList::ReleaseRCWListRaw+0x14 0012d95c 79f277e5 mscorwks!RCWCleanupList::ReleaseRCWListInCorrectCtx +0x97 0012d96c 77525fbe mscorwks!CtxEntry::EnterContextCallback+0x94 0012d988 77e7a19c ole32!CRemoteUnknown::DoCallback+0x7a 0012d9a4 77ef321a RPCRT4!Invoke+0x30 0012dda8 77ef3bf3 RPCRT4!NdrStubCall2+0x297 0012de00 77600c31 RPCRT4!CStdStubBuffer_Invoke+0xc6 0012de40 77600bdb ole32!SyncStubInvoke+0x33 0012de88 7750f237 ole32!StubInvoke+0xa7 0012df60 7750f15c ole32!CCtxComChnl::ContextInvoke+0xe3 0012df7c 7750fc79 ole32!MTAInvoke+0x1a 0012dfa8 77600e3b ole32!STAInvoke+0x4a 0012dfdc 776009bc ole32!AppInvoke+0x7e 0012e0b0 77600df2 ole32!ComInvokeWithLockAndIPID+0x2e0 0012e0dc 7750fcb3 ole32!ComInvoke+0x60 0012e0f0 7750fae9 ole32!ThreadDispatch+0x23 0012e108 77d48744 ole32!ThreadWndProc+0xfe 0012e134 77d48826 USER32!InternalCallWinProc+0x28 0012e19c 77d489dd USER32!UserCallWinProcCheckWow+0x150 0012e1fc 77d48a20 USER32!DispatchMessageWorker+0x306 0012e20c 77512c02 USER32!DispatchMessageW+0xf 0012e23c 77512761 ole32!CCliModalLoop::PeekRPCAndDDEMessage+0x4c 0012e250 77557227 ole32!CCliModalLoop::BlockFn+0x5e 0012e2c4 79f27b88 ole32!CoWaitForMultipleHandles+0xcf 0012e2e4 79f27acf mscorwks!NT5WaitRoutine+0x51 0012e350 79f27a33 mscorwks!MsgWaitHelper+0xa5 0012e370 79f17493 mscorwks!Thread::DoAppropriateAptStateWait+0x28 0012e3f4 79f1732f mscorwks!Thread::DoAppropriateWaitWorker+0x144 0012e444 79f27cf0 mscorwks!Thread::DoAppropriateWait+0x40 0012e494 79f27c76 mscorwks!Thread::JoinEx+0x86 0012e4a0 79f27c52 mscorwks!Thread::Join+0x13 0012e4f0 79f20743 mscorwks! RCWCleanupList::CleanupWrappersInCurrentCtxThread+0x15a 0012e4f8 79f20665 mscorwks!RCW::Initialize+0x77 0012e52c 79f1dc99 mscorwks!RCW::CreateRCW+0x51 0012e59c 79f1c9a5 mscorwks!COMInterfaceMarshaler::CreateObjectRef+0x4d 0012e5fc 79f1c110 mscorwks!COMInterfaceMarshaler::FindOrCreateObjectRef +0xb4 0012eabc 79f82a1c mscorwks!GetObjectRefFromComIP+0x1b4 0012eadc 79f82a01 mscorwks!UnmarshalObjectFromInterface+0x19 0012eaf8 79f1e19d mscorwks! InterfaceMarshalerBase::ConvertSpaceNativeToCLR+0x30 0012eb00 79f1e0b2 mscorwks! DefaultMarshalOverrides<InterfaceMarshalerBase>::MarshalNativeToCLROut +0x11 0012ed3c 79f1f206 mscorwks!RunML+0x4f9 0012ee58 79f1ed6a mscorwks!COMToCLRWorkerBody+0x10f 0012eeb4 79f1ec81 mscorwks!COMToCLRWorkerDebuggerWrapper+0x37 0012f088 0173a271 mscorwks!COMToCLRWorker+0x164 WARNING: Frame IP not in any known module. Following frames may be wrong. 0012f0b0 1425fac3 0x173a271 0012f1e0 142672fd AppController!CAppController::Display+0x184 0012f2d0 142504d2 AppController!CAppController::Create+0x683 0012f398 14236181 AppController!CAppController::CreateComponents+0x2da 0012f534 4599c7be AppController!CAppController::Open+0x607 0012f704 0108654d StateMgr!StateMgr::IState_Ope+0xded 0012f8c8 79f21268 TestMenu!Multiple::INotify_Notify+0xcc7 0012f9a8 045a0dd6 mscorwks!CLRToCOMWorker+0x196 0012f9e4 0ff37e88 0x45a0dd6 0012fa40 0ce5a340 0xff37e88 0012fa74 0ce59f28 0xce5a340 0012fac0 010ed2e2 0xce59f28 *** WARNING: Unable to verify checksum for C:\WINDOWS\assembly \NativeImages_v2.0.50727_32\System.Windows.Forms \5892bc4805482546977cc303fe56856e\System.Windows.Forms.ni.dll 0012fc28 7b0d02da 0x10ed2e2 0012fc48 7b0d02da System_Windows_Forms_ni+0x1002da 0012fc8c 7b072c44 System_Windows_Forms_ni+0x1002da 0012fcf8 7b07a73d System_Windows_Forms_ni+0xa2c44 0012fd74 77d48744 System_Windows_Forms_ni+0xaa73d 0012fda0 77d48826 USER32!InternalCallWinProc+0x28 0012fe08 77d489dd USER32!UserCallWinProcCheckWow+0x150 0012fe68 77d496d7 USER32!DispatchMessageWorker+0x306 0012fe78 6600a4a3 USER32!DispatchMessageA+0xf 0012feb8 6600a41a MSVBVM60!ThunderMsgLoop+0xfd 0012fecc 6600a3bc MSVBVM60!CMsoCMHandler::FPushMessageLoop+0x19 0012fefc 6600a2f8 MSVBVM60!SCM::FPushMessageLoop+0xb9 0012ff18 6600a2c3 MSVBVM60!SCM_MsoCompMgr::FPushMessageLoop+0x2b 0012ff3c 6600361c MSVBVM60!CMsoComponent::PushMsgLoop+0x26 0012ffb8 00404dba MSVBVM60!ThunRTMain+0x9b 0012fff0 00000000 AppMain!__vbaS+0xa Tag: COM trouble Tag: 274437
  - 24
    - Questions on vcredist_x86.exe ? Hi Experts: I have a few questions on running the VC redistribution package vcredist_x86.exe: After playing with it a few times on different machines, it seems to me that vcredist_x86.exe generated either one of the directories below: x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.762_x-ww_6b128700 x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.762_none_10b2f55f9bffb8f8 Anyone knows why it generate different directory on different runs and what the "1fc8b3b9a1e18e3b", "x-ww_6b128700" and "none_10b2f55f9bffb8f8" mean? Thanks in advance! Polaris Tag: COM trouble Tag: 274435
  - 25
    - What happened to Bobby Schmidt's "Deep C++"? So, I've been trying to find some of the issues of the MSDN magazine column "Deep C++" by Bobby Schmidt. They show up on a google search, but they only link to "Content not found" errors on msdn.microsoft.com. If I go to the msdnmag search page http://msdn.microsoft.com/msdnmag/find/default.aspx? and look for "Schmidt" by author or "Deep C++" by title, I get nothing. Did this guy offend the Microsoft gods and get obliterated? If anybody knows where I can find these articles, let me know. Thanks, PaulH Tag: COM trouble Tag: 274433
- Next
  - 1
    - deque assign syntax Hi, The first assignment statement doesn't work because I didn't use []s or *s. Is this no longer acceptable syntax or is it a VC++ idiom? thanks, quakerP char cReadBuf[] = "1234567"; deque<char> cDdeq1(8); void main(void) { int i; // This does not work. cDdeq1.assign(cReadBuf, cReadBuf+8); // This works. cDdeq1.assign(cReadBuf[0], cReadBuf[8]+8); //This works too. cDdeq1.assign(*cReadBuf, *cReadBuf+8); for(i = 0; i < 8; i++) cout << cReadBuf[i] << endl; } Tag: COM trouble Tag: 274425
  - 2
    - Want to create a function which returns a value obtained from a callback function Hello I want to write a C++ function which returns a Windows handle. I need to call a callback function to find the Window. The specific function is EnumChildWindows. As the final parameter of EnumChildWindows I can pass a pointer back to my class. so I can access class functions ok. I thought that I could have a member variable in the class which is an HWND. Then the this variable could be updated by EnumChildWindows if a window handle is found. then when the function returns I just take the value in the variable as the first found windows handle. I suppose that would work but it doesn't feel so elegant. Has anyone got any better ideas? Angus Tag: COM trouble Tag: 274417
  - 3
    - Moving data from array to deque Hi, The ReadFile function places read info into a char array (cReadBuf) and I would like for put it in a deque. What is the most efficient way to copy, using pushes or some other type of iteration? Thanks, quakerP ===================================== char cReadBuf[512]; deque<char> cDdeq1(512); ; Result = ReadFile(m_usbHandle, cReadBuf, m_reportLength, &bytesRead, (LPOVERLAPPED) &HIDOverlapped); Tag: COM trouble Tag: 274408
  - 4
    - Variable arguments & class objects... what's the "type" When a call to a function with variable arguments is made, such as any of the printf() family of functions, all of the actual parameters passed after the last formally defined argument get pushed on the stack after going thru some sort of type casting operation. Integral data types appear to all get cast into a numeric value equal to the machine architecture's native word size [e.g. 32-bits or 64-bits]. Likewise, pointer data values get treated the same way. What I'm interested in knowing for certain is how MS Visual C/C++ handles instances of class objects that are passed in this way. It appears that the address of the class object is what gets pushed on the stack, but what I can't tell is whether or not the compiler does this unconditionally or if it actually uses some sort of implicit conversion operator that by default uses the value of "this". If there is a data type that the class is being implicitly cast to, then what I really want to do is to provide my own overload of that conversion operator so that I can have something else, such as maybe a string buffer which the address of gets used instead of the class object's own address. Any ideas? TIA, Chuck -- Chuck Chopp ChuckChopp (at) rtfmcsi (dot) com http://www.rtfmcsi.com RTFM Consulting Services Inc. 864 801 2795 voice & voicemail 103 Autumn Hill Road 864 801 2774 fax Greer, SC 29651 Do not send me unsolicited commercial email. Tag: COM trouble Tag: 274395
  - 5
    - Unresolved externals in release configuration Hi, My project compiles w/o errors in debug configuration. When I try to generate a release version, I get unresolved externals. Most of them are related to an external dll I am using but one of them is a messaging function for a modeless dialog. I checked all of the project settings for debug and release and they appear to be identical. Any idea what could cause this? I'm using VC++ 6.0. Thanks Tag: COM trouble Tag: 274394
  - 6
    - Unresolved externals in release configuration Hi, My project compiles w/o errors in debug configuration. When I try to generate a release version, I get unresolved externals. Most of them are related to an external dll I am using but one of them is a messaging function for a modeless dialog. I checked all of the project settings for debug and release and they appear to be identical. Any idea what could cause this? I'm using VC++ 6.0. Thanks Tag: COM trouble Tag: 274393
  - 7
    - Implementing HDS_DRAGDROP style of CHeaderCtrl Hi, I want to activate the HDS_DRAGDROP style of CHeaderCtrl (which is attached to my CListView). However, I never call CHeaderCtrl::Create() because the creation is done automatically when the CListView is created (so the code is hidden from a novice like me). And CHeaderCtrl doesn't seem to have a SetStyle() function that I can call later. Has anyone got an example of how to do this please? thanks, Neil Tag: COM trouble Tag: 274388
  - 8
    - Vista and NT Service architecture I need to transfer a simple NT Service module to Vista from Windows 2000 Server. The API calls are very simple and just delete all the files in a dir that are over X days old. Question 1: Are there differences in the SCM from Windows 2000 to Vista? I can not find them posted. Question 2: I can't find information on CPL applications. Are they still compatible with Vista? Is there some arch changes in the CPL that needs to be modified? BIG THANKS!!! Tag: COM trouble Tag: 274387
  - 9
    - Visual c++ 6.0 default settings adding a project When adding a new project to a work space, we have to change some settings. disable language extensions structure alignment from 8 bytes to 4 bytes. And I think some others. Is there a way to set this up so these are the new defaults for any new project? Tag: COM trouble Tag: 274386
  - 10
    - LoadLibrary path problem Hello All I'm using LoadLibrary to load a DLL that comes from a third party company. The problenm is that LoadLibrary will only accept a fully qualified path to the DLL. A relative path returns error 126 (module not found) and a null HINSTANCE. Strangely a full path sets GetLastError() to 6 which is invlalid handle although all GetProcAddress calls work and the DLL functions ok. I am using MS C++ 7 on Windows XP Service Pack 2. Any ideas ? Tag: COM trouble Tag: 274364
  - 11
    - Changing file names in VS projects. Greetings, I have inherited a workspace with 2 projects in it. Looking at the directory I see that the .cpp files for the first created project are in the workspace directory and the .cpp files for the 2nd project are in a sub-folder. In the workspace and the new project folder there is a file named UsbHid.cpp. This does not cause a problem for VS but to avoid confusion for me and others I would like to rename the file in the sub-folder. It is more difficult than I thought. I can change the name by external means but the project clings to the old name. Is there a clean way to do this? I don't immediately see a way to delete files and/or projects. Thanx, jh Tag: COM trouble Tag: 274362
  - 12
    - PostMessage() Error Hello, is there a way to send a string using PostMessage()? int status; unsigned char c, s[90] = "message to be sent"; c = s[0]; // the following works status = PostMessage(hwnd, WM_CHAR, c, 1L); // the following doesn't work status = PostMessage(hwnd, WM_CHAR, s, strlen(s)); Thanks Tag: COM trouble Tag: 274360
  - 13
    - lvalue question Hi, If we want a statement to return an lvalue, in C++, you need to use "by-reference". I still can't visualize what is meant by lvalue T i; < this is an lvalue object? j = i < i and j are both lvalues? Am i correct? Thanks Tag: COM trouble Tag: 274344
  - 14
    - static variables discarded by the VS.NET2003 linker Hi Everyone, I found a thread on that topic posted year 2004 but not satisfied with the information there. So I decided to raise that issue once again. In general the problem with VS.NET 2003 linker is that it will discard an object file containing definitions of global variables of any type/ class if nothing else in this file is referenced by other files in the project. Now I have the following case. In given source file I have definitions of several global variables that in contructor register itself in another global container object. Later in code any of these variables would be accessed via that global container. But what actually happens is that the linker decides to discard the object files and instances of these global variables are never created and registered in the container. I am not sure what should be the correct behaviour of the linker in that case but could anyone let me know how to overcome that problem and make the linker to include the needed object files without forcing it to include any object files from given library even if not referenced at all? Can we say that in my case objects are not referenced at all since even if they are not referenced directly still it is possible to be reference via the container object? Many thanks in advance! Best regards, Boris. Tag: COM trouble Tag: 274341
  - 15
    - How to use "quote" in TEXT(quote) Hi there. I'd like to change "quote" in TEXT(quote), i.e. for example, char *temp = "filename0"; for(i=0; i<10; i++) { .... function(TEXT(temp), ...); filename[8] += 1; .... This code will be an error as follow : error C2065: 'L_temp' : undeclared identifier And without TEXT() function fails due to ERROR_FILE_NOT_FOUND. Is there any good idea? Thanks. Tag: COM trouble Tag: 274337
  - 16
    - Is it possible to implement Serialisation in DialogBase Application Hi guys, how r u, can u please tell me is it possible to implement Serialisation in Dialog Base Application , if yes then how is it possible. thanks. Tag: COM trouble Tag: 274335
  - 17
    - Why on earth are there no VC++ 2005 SP1 redists on downloads.microsoft.com? I mean, seriously, what gives? If you run a program needing SP1 on a machine with only the RTM redist you get what is probably one of the dumbest, most unhelpful, stupidest error messages imaginable. It's TOTALLY non-obvious that there's a version mismatch; the configuration information is not incorrect, it's just unfulfilled. depends even more helpfully suggests that the manifest may be corrupt. So why the hell aren't the redists on the website? The redists you have at the moment are useless for SP1 apps; what the hell's the point of even having them? The whole SxS is such a brain-damaged sorry-ass system. And how about fixing it so that the error messages aren't so totally worthless? Was this thing put together by monkeys or something? -- Tag: COM trouble Tag: 274329
  - 18
    - Asking for trouble with incomplete types? Hi, I am trying to reduce the complexity of a set of classes I made a couple of years ago, what equates to a set of trees, for which I want to use std::list and avoid having to use direct pointers anywhere. I wish to have a class contain a list of itself, as so: class B; class A { public: std::list<B> List; typedef std::list<B>::iterator iterator; iterator begin() { return List.begin(); } }; class B { public: A m_a; }; My question is, provided I ensure there is no in class A referencing direct instances of B, can I be fairly certain im not launching into a world of c++ driven pain, for example no: class A { ... B GetSomething(); }; I expect that as long as thing that call items such as copy constructors or -> / * operators of list<B>::iterator are in cpp files there should be no issue. Could anyone tell me different? Regards, -- - Mark Randall http://www.temporal-solutions.co.uk http://www.awportals.com Tag: COM trouble Tag: 274322
  - 19
    - Odd behavior of #if preprocessor directive Hello, Can somebody explain what am I doing wrong or why #if preprocessor directive shows this odd behavior. I am using Visual Studio 2003. I have following code: ============================= #define MY_MACRO MACRO_B #if MY_MACRO==MACRO_A # define MY_PRINT printf ("MACRO_A\n") #elif MY_MACRO==MACRO_B # define MY_PRINT printf ("MACRO_B\n") #else # define MY_PRINT printf ("MACRO_C\n") #endif extern void print_my_line ( ) { MY_PRINT ; } ============================= I was expecting that in my function print_my_line, MY_PRINT would expand to print "MACRO_B". However when I run this code through preprocessor, I get following: ============================= extern void print_my_line ( ) { printf ("MACRO_A\n") ; } ============================= This happens regardless if I define MY_MACRO to be MACRO_B or MACRO_C or anything else. it appears that "#if MY_MACRO==MACRO_A" always evaluates to TRUE regardless what the definition of MY_MACRO is. Is there any explanation why preprocessor behaves like this. Am I missing some flags or settings? Thanks and Regards Yogi Watcher Tag: COM trouble Tag: 274317
  - 20
    - .NET Socket-ReConnection Error-Connecting To UnWorking Server Sock Hello, First of all I wish you a good day. My help request is about .NET asynchrounus socket communication. I have developed Server-Client Windows Forms .NET applications in VC++ .NET v2003. I have several problems re-establishin connection between peers. Below are my problem cases after closing of the first successfull communication; #1) I re-start the Server to accept connection requests. While it is waiting, I run the Client. It is connecting to server socket and waits for the data communication. But at this time, my server program is still waiting at "BeginAccept". Nothing changes at its status. #2) I re-start the Server to accept connection requests. While it is waiting, I run the Client. It gives 10061 WSAECONNREFUSED (Connection refused by host) #3) After first successful communication closing, I start the Client to connect to server 2-4 seconds later. It connects to a server socket however my server socket program is not started to accept connection requests at this time. Then, Client program waits for data communication. I checked the working TCP sockets with "netstat -n -o 2" command. After the closing of the first successfull communication, first server socket's status either TIME_WAIT and several seconds later CLOSE_WAIT, or when it TIME_WAIT, new connection is being set with same server IP:PORT with clietn socket (problems at #1 and #3) I shutdown and close my sockets using the same commands. Below is the function, that is same for both; static Socket *m_ServerSocket = NULL; // *m_ClientSocket = NULL; System::Void mf_Shutdown_And_Close() { try { if (m_ServerSocket != NULL) { if ( m_ServerSocket->Connected ) { m_ServerSocket->Shutdown(SocketShutdown::Both); Thread::Sleep(250); } m_ServerSocket->Close(); m_ServerSocket = NULL; Thread::Sleep(500); mf_ChangeButtonStatusTo( ConnStatus::CONNECT ); } } catch(Exception *exp) { // Programda hata durumunu gÃ¶ster } } Below are the options of my sockets Server Socket: SetSocketOption(..., SocketOptionName::ReuseAddress, true); SetSocketOption(..., SocketOptionName::KeepAlive, true); SetSocketOption(..., SocketOptionName::DontLinger, true); and Client Socket: SetSocketOption(..., SocketOptionName::DontLinger, true ); Previously, I developed similar Server-Client programs using native C++ and blocking codes. I didnot faced with this kind of problems. Why Server socket is not closing totally after succesfull Shutdown() and Close() commands? I put Thread::Sleep(..) to let the program give time to system to release resources. Even Using GC::Collect() did not useful. Thank you very much in advance for your helps. PS: You may check my programs www.AlperAkcayoz.com/PRG/AsynchSoket-CppNET.zip I use Windows XP Pro Visual C++ .NET Standard v2003 .NET Framework 3.0 Windows Forms .NET application -- ~~~~~~~~~~~~~~~~~~~ Ä°yi Ã?alÄ±Å?malar / Wish You Good Work Alper AKÃ?AYÃ?Z (Bil Muh) www.AlperAkcayoz.com Tag: COM trouble Tag: 274313
  - 21
    - const oddity in decorated names If I declare the functions void foo(int bar[]) void bar(int * bar) then I expect them to behave the same way - and indeed they do in most cases. I have give these functions these (admittedly meeningless) implementation: __declspec(dllexport) void foo(int bar[]) { bar = NULL; } __declspec(dllexport) void bar(int * bar) { bar = NULL; } The program compiles. If I look at the decorated names of the exported names in the dll they aren't the same though. foo gets a decorated names that indicates that it was declared as void foo(int * const bar). But since the program above compiled that is obviously not the case. I'll have admit that the difference between "int *" and "int * const" in a function argument is irrelevant to the caller of the function, but is there a reason for this oddity, or is this just a mistake? Tag: COM trouble Tag: 274301
  - 22
    - use WriteFile to send buffer to COMM port error! --Urgent help!!!!!!!!!!!!!!!!!!!!!!!!! Hi,all I want to write a char buffer to COM1 port, I write the code as below: //Step1 : open & init COM1 port hCom=CreateFile("COM1", GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, NULL); if(hCom==(HANDLE)-1) { AfxMessageBox("Failed To Open COM1!"); return FALSE; } SetupComm(hCom,1024,512); COMMTIMEOUTS TimeOuts; TimeOuts.ReadIntervalTimeout=MAXDWORD; TimeOuts.ReadTotalTimeoutMultiplier=0; TimeOuts.ReadTotalTimeoutConstant=0; TimeOuts.WriteTotalTimeoutMultiplier=100; TimeOuts.WriteTotalTimeoutConstant=500; SetCommTimeouts(hCom,&TimeOuts); DCB dcb; GetCommState(hCom,&dcb); dcb.BaudRate=2400; dcb.ByteSize=8; dcb.Parity=NOPARITY; dcb.StopBits=1; SetCommState(hCom,&dcb); PurgeComm(hCom,PURGE_TXCLEAR|PURGE_RXCLEAR); //Step 2: Send buffer to COM1 port OVERLAPPED m_osWrite; memset(&m_osWrite,0,sizeof(OVERLAPPED)); m_osWrite.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL); char lpOutBuffer[12]; memset(lpOutBuffer,'\0',16); lpOutBuffer[0]=0x00; lpOutBuffer[1]=0x00; lpOutBuffer[2]=0x00; lpOutBuffer[3]=0x00; lpOutBuffer[4]=0x5F; lpOutBuffer[5]=0x5F; lpOutBuffer[6]=0x50; lpOutBuffer[7]=0x50; lpOutBuffer[8]=0x01; lpOutBuffer[9]=0xA1; lpOutBuffer[10]=0x8F; lpOutBuffer[11]=0x8F; DWORD dwBytesToWrite=12; DWORD dwBytesWritten; COMSTAT ComStat; DWORD dwErrorFlags; BOOL bWriteStat; ClearCommError(hCom,&dwErrorFlags,&ComStat); bWriteStat=WriteFile(hCom,lpOutBuffer,dwBytesToWrite,& dwBytesWritten,&m_osWrite); if(!bWriteStat) { if(GetLastError()==ERROR_IO_PENDING) { WaitForSingleObject(m_osWrite.hEvent,1000 ); } } I use COM1 to send buffer and COM2 to receive buffer, the COM1 & COM2 setting are the same, but after I sent the buffer , I receive 15 bytes from COM2 and the bytes content are different from those I sent from COM1, could anybody tell me why? Any helpful ideas would be highly appreciated! -ja Tag: COM trouble Tag: 274297
  - 23
    - Visual Studio 2005 include file error I have ported a 32 bit module to 64 bit. It does database and e-mail, and requires the inclusion of mapi and sql header files. These header files are pulled in from the platform SDK inclusion directory of Visual Studio 2005. So, Visual Studio 2005 has the following: MAPIDEFS.H declares: typedef ULONG BOOKMARK; SQLTYPES.H declares: typedef SQLULEN BOOKMARK; This worked fine in 32 bit because SQLULEN was typed as unsigned long. Under 64 bit, it is typed as UINT64. Of course, my module will not compile, without error, as a 64 bit application because of the redefinition of BOOKMARK Can someone suggest an elegant way of getting around this use of the same type name that is based on a different type? Either I'm missing something obvious/easy, or this change wasn't thought out properly. Thanks, Robert. Tag: COM trouble Tag: 274293
  - 24
    - Forward references Hello, typedef struct _cc { struct _aa a; } cc; typedef struct _aa { struct _cc c; } aa; How do I make it compile? Thanks Tag: COM trouble Tag: 274292
  - 25
    - How to track down BSTR allocation problems? Hi! I experience constant program crashes. I know it is very likely due to wrong usage of COM task heap (CoTaskMemAlloc/SysAllocString API) but cannot track the source of a problem directly at the point of a crash -- it crashes in SysFreeString on an already released (elsewhere) memory. Putting some debugging effort in this reveals that at some (essentially random) point SysAllocString returns a block of memory already occupied by another BSTR. When the latter of corresponding SysFreeString calls is made, the program crashes. I have source files at hand, but there is too much of code to look with bare eyes... so I'm stuck. Can one recommend any tool or technique to track down such BSTR allocation errors? Thanks. Alex Shulgin Tag: COM trouble Tag: 274288

I'm trying to create a database connection object like so:

_ConnectionPtr pConn = NULL;

CoInitialize(NULL);

HRESULT hr = pConn.CreateInstance((__uuidof(Connection)));

However, the CreateInstance call fails with the error "Class not
registered". I'm guessing there's some COM component not installed,
but I'm not quite sure where it comes from. Any help is
appreciated.

Thanks.

Top

Re: COM trouble by Alex

Alex
Thu Mar 01 06:36:00 CST 2007

<bob@coolgroups.com> wrote::
> I'm trying to create a database connection object like so:
>
> _ConnectionPtr pConn = NULL;
>
> CoInitialize(NULL);
>
> HRESULT hr = pConn.CreateInstance((__uuidof(Connection)));
>
> However, the CreateInstance call fails with the error
> "Class not
> registered". I'm guessing there's some COM component not
> installed,
> but I'm not quite sure where it comes from. Any help is
> appreciated.

It means that CLSID you requested (__uuidof(Connection))
doesn't exist in Registry. Ensure that you have MDAC
properly installed.

Alex

Top