Passing template function to _beginthreadex

Visual C++ Language

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  - 1
    - SendKeys in C++ Hello everyone, Is there an equivalent to SendKeys.Send in C++ I have looked into keybd_event and SendInput, but to my knowledge you can only send one key at a time with those functions. Thanks for any help. Edit: I'm not using the .Net Framework so I can't use any of that stuff. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 2
    - Closed Captioning on Amcap Hi all, I am not sure whether this is the right place to post this query, but here goes.. Can anyone help me to get Closed Captioning to working on Amcap. Wheever I use the "CC" option in Amcap, it throws an error saying "Cannot render closed captioning". Am I missing some filters that amcap is not able to enumerate Any help would be appreciated. Thnx in adv, Geek Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 3
    - Webbrowser control's BeforeNavigate2 event question Hi all Just want to ask how to retrieve the string( ) value of the TargetFrameName parameter in webbrowser control's BeforeNavigate2 event: void CMyClass::BeforeNavigate2Explorertestnews(LPDISPATCH pDisp, VARIANT* URL, VARIANT* Flags, VARIANT* TargetFrameName, VARIANT* PostData, VARIANT* Headers, BOOL* Cancel) { CString strLink = (CString)URL->bstrVal; AfxMessageBox(strLink); // it works, the URL is displayed in the messagebox CString strTargetFrameName = (CString)TargetFrameName->bstrVal; // it displays a blank messagebox even if the href's tag target's attribute is set to // "_self" AfxMessageBox(strTargetFrameName); } The goal here is to retreive the attribute(_blank, _self, etc) of the target tag of the active link in the webbrowser control when clicked. For ex: < a href= http://testsite123492.com target="_self"> Thank you k Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 4
    - Maximizing compatibility of VC++ 2k5 projects Hello ALL, I've got following question: how can I setup up the C++ compiler in VS2005 to compile applications with compatibility across win NT family... all applications I build can run only on XP SP2, failing to run under Win 2k and XP without SP2 (throws errors like "Invalid Win32 application, please reinstall"). I actually need to run my applications on Win NT family or at least on Win 2k. I use clean C++ and Win32 functions (all compatible with lower Win versions). Thanks in advance. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 5
    - Finding in network service "File and Printer Sharing for Microsoft network " is installed Is there a way pogramatically,that I can determine if the network service "File and Printer Sharing "is enabled in a system Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 6
    - Still having problems with printing out INT64 integers Still having problems with printing out INT64 integers I am still having problems with this code. This prints out a number, but it's not exactly what I want. I need to print out an INT64 number that is in sync all the way through. For example: The hex: FF D8 FF E1 1E 63 45 78 is the first line of the file test.jpg. I would like to display its integer (unsigned) value: 18435766416983672184 But what it does it prints out is the number for hex 78 45 63 1E E1 FF D8 FF, which is 8666442042236197119. I thought this would be ok, but later when I want to do more stuff to the program it won't work. There has to be a simple way of reading in 64 bits of data and then output the decimal value into a .txt file. Please can someone help me! This is the code I have now, but if you can suggest a better way, I’ll take it! #include <stdio.h> #include <stdlib.h> int main( void ) { unsigned __int64 Oneline; char buf[ 8]; FILE *INfptr; FILE *OUTfptr; if ((fptr = fopen( "test.jpg" , "rb" )) == NULL ){ printf ( "Cannot open file\n" ); exit ( 1 ); } if ((fptr = fopen( "Kounter-report32.txt" , "w+" ))== NULL ){ printf ( "Cannot open file\n" ); exit ( 1 ); } do{ fread ( buf, 1, sizeof (buf), INfptr ); // fread(reinterpret_cast<char*>(&Oneline), 1, sizeof(Oneline), INfptr); (WAS using serveral different methods of reading and writing, they worked but not the way I need it too.) fprintf(OUTfptr,”%I64u/t”, Oneline); }while (!feof (INfptr)); fclose ( INfptr ); fclose ( OUTfptr ); } Thank you once again, and sorry for troubling you guys so much James Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 7
    - [C++/CLI] STL/CLR's Vector Problem. Hello, sorry if this isn't the good forum to post my question to. I have a STL/CLR vector called "vecteurMot": Code Snippet private: cliext::vector<mot^>^ vecteurMot; then I do a pusback to test it : Code Snippet vecteurMot->push_back(gcnew mot("Mot FR : ", "Mot JP : ", "Ceci n'est qu'un exemple" )); Everything compile, I run it then get a debugger error: "Additional information: The referenced object isn't defined to an object instance" (That might be wrong, tried to translate from french to English) Then I press Break, and the debugger show me those line : Code Snippet size_type size() { // return length of sequence return (_Mysize); } Code Snippet void push_back(value_type _Val) { // insert element at end insert_n(size(), 1, _Val); } in the Vector file. Hope you can help me. Thanks. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 8
    - Wow i am suprised i cant find this.... I searched google i searched here and i searched mIrc and no one seems to know how to do this, they tell me to use a difrent compiler but i love microsoft and could not do that. I am sure you guys probably covered it some where but i can't find it so here goes. I use visual studio 2005 standard edition. I recently finished learning the core language of c++ and am moving on to implement that knowledge with win api in which i am trying to learn now. I am using this tutorial to learn win api http://members.fortunecity.com/harrycik/files/Forgers.htm. Obviously i cant use the old new >> console application >> empty project because it doesn't work, i tryed new >> win 32 project >> pre-compiled header and empty project but none work. This is the source I am trying to compile : #include <windows.h> int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBox(NULL, "Goodbye, cruel world!", "Note", MB_OK | MB_SYSTEMMODAL); return 0; } and usually i have to add "stdafx.h" but i always get the error error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [22]' to 'LPCWSTR' please help me i am so frustrated and just want to get making games again. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 9
    - Win 32 timer - OnTimer not called I am a newbie to VC++ and I am trying to use a win32 timer (with MFC and VS 2005) . The problem is that the OnTimer function is never called. Here is part of the code that I've been trying to implement: void CxxDlg: nBnClickedStart() { //Create a Timer utmrTx = SetTimer(1, 1000, NULL); } void CxxDlg: nBnClickedStop() { // To Stop the timer KillTimer(utmrTx); } void CxxDlg: nTimer(UINT nIDEvent) { } I do not get any compile time error and when I debug the code, I see that uTmrTx is set to 1. Only issue is that the OnTimer function is never called. What am I doing wrong Thanks, IdleBrain. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 10
    - Win32 Application Wizard Problem in VS2005 under Vista When I try to create a new C++ static library project, the Application Wizard's welcome screen that has both 'overview' and 'application settings' is completely disfunctional. Hyperlinks, 'Finish' and 'Cancel' buttons do nothing. Also some text is missing from the dialog (the current application settings bullets are blank). The only way out is to close the dialog using the red cross on the top-right-hand corner. Even the help button doesn't work. Obviously, I cannot create any new projects. I have installed VS2005 Enterprise under Vista Home Pro. I have also installed VS2005 SP1 as well as the service pack for VS2005 under Vista. I run VS2005 with administrative privilages. I don't have any problems with C# and ASP.NET projects. I even tried VS2008 Beta2 but had the same problem. One other symptom I see is when comparing file versions using VSS. One of the compare screens is normally blank until I force an update by selecting the text or covering it with another window. I am using SourceSafe version 8.0. I will really appreciate any help. Thanks in advance, Farhad Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 11
    - TreeView Control HitTest doesn't work Hi all. i have treeview control on my dialog. TreeView with cechkboxes. I need to find, on wich item user click. In NM_CLICK i try to found item through HitTest method: 1) Getting current Cursror coords: GetCursorPos(&pt); 2) Convert to Client coords: ScreenToClient(&pt); 3) And trying to recieve HTREEITEM through HitTest: HTREEITEM hItem = pTree->HitTest(pt,&uFlag) void CHitTestDlg::OnNMClickTree1(NMHDR *pNMHDR, LRESULT *pResult) { CTreeCtrl* pTree = (CTreeCtrl*) GetDlgItem(IDC_TREE1); UINT uFlags; CPoint point; HTREEITEM hItem; GetCursorPos(&point); ScreenToClient(&point); hItem = pTree->HitTest(point,&uFlags); } hItem will be 0x00000000... why so plz help:) Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 12
    - Debuggin Hi, when I am trying to debug, now and then Visual Studio opens a Assembler file to debug, I don't want that, eaven when it is my own code it opens a dissambly file. What is wrong thanks in advance, Patrik Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 13
    - How do i view external source dependancies in 2005 .Net? I am porting legacy code from Visual Studio C++ version 6 to 2005 .Net and i would like to know how do I view the external source dependancies in the solution explorer as you can in VS 6 These are usually header files that are declared in a C++ module but not part of the header folder of the project. I've looked all over the IDE / help to no avail, can anyone help me Thanks in advance! Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 14
    - HeapReAlloc user break point I'm looking for a problem with some particular code that's written in C and have been looking around the line that calls the "user break point" all of today just about. The HeapAlloc function is working fine and I've inspected the memory around pObjects (especially near the end) to make sure it's not an overrun and that everything is alloced cleanly. nRecordMax is at 2000 here, but it fails even if I just insert a 1003 in its place (the heap is allocated to 1000 to begin with). All other code seems to be fine. Any ideas Code Snippet pTempObjectReAlloc = HeapReAlloc (GetProcessHeap(), HEAP_ZERO_MEMORY, g_sGlobalStruct.pCurrentDS->pObjects, (g_sGlobalStruct.pCurrentDS->nRecordMax * sizeof(DS_OBJECT_STRUCT))); Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 15
    - windows service hi im programing for a windows service. if i get an error in d program, how do i display it. that is while running the service, if i get an error, how do i display it Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 16
    - How to export C++ templates to CLR library to be used in C#? Hi! I am trying to export some libraries that are written in C++ to a DLL with the /clr option so it can be used in C#. I have some troubles to fully understand the how to export templates and generics to a CLR library. I have been searching the web for days for a good answer and I only find blogs that explain the goods and bads between generics and templates. And that is not the answer I am looking for. For example, I have this code in C++, compiled in a DLL and exported to a C# project. Code Snippet namespace MyDLL { generic<class T> public ref class GenericRefClass { public: T value; } template<class T> public ref class TemplateRefClass { public: T value; } generic<class T> public value class GenericValueClass { public: T value; } template<class T> public value class TemplateValueClass { public: T value; } } When I import MyDLL to a C# project I only see GenericRefClass and GenericValueClass . Is like the templates are not implemented in the library. in ECMA 334 pag. 74 says "C# generics will immediately be familiar to users of generics in Eiffel or Ada, or to users of templates in C++." Written like that is like generics in C# are the same as templates in C++. But it should be wrong. I know that templates are resolved during compilation and generics during run time. So, does that means that there is no way that templates could be interchangable through a dll Or is there another way Because there is a HUGE problem. How can I reuse the boost libraries http://www.boost.org/ that are mostly templates in a C# project Thanks in advance. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
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  - 1
    - Interface dereference operator ( * ) implementation not creating LValue I have an interface with static operators like below: public interface class IA { static operator int (IA ^ parm); // convert to int static operator IA ^ (int i); // convert from int static IA ^ operator * (IA ^ parm); // dereference returning self, gives error ( see below ) // some instance functions which are used by the first two static operators IA ^ ReturnSelf(); // called by third static operator to return self on dereference }; I have a ref class, called X, which implements the interface and defines the instance functions, like this: public ref class X : IA { // implementation of IA's instance functions IA ^ ReturnSelf() { return this }; }; I test X's implementation with code like this: X ^ x = gcnew X; IA ^ ix = safe_cast<IA ^>(x); int ii = 0; ii = *x; // this works fine *x = 8; // this gives error C2106: '=' : left operand must be l-value Does anybody have any idea why the interface's dereference operator is not producing an lvalue I admit that dereferencing to oneself is unusual, but surely a ref class object is an lvalue. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 2
    - data type conversion in VC++ 8.0 When i execute the below test program #include<stdio.h> void main() { double l_double_value; l_double_value = (double) (0xffffffff) ; printf("%lx\n", (long) l_double_value); } I get the below output. in VC++ 8.0. 80000000. But in VC++ 6.0 i get fffff... Can you pl help me to know about this.. Regards rajesh. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 3
    - Frustrating Error - error C2259: cannot instantiate abstract class The Error error C2259: 'SphereEntity' : cannot instantiate abstract class 1> due to following members: 1> 'void Entity::render(G3D::RenderDevice *) const' : is abstract 1> : see declaration of 'Entity::render' 1> 'G3D::RealTime Entity::getIntersectionTime(const G3D::Ray &) const' : is abstract 1> : see declaration of 'Entity::getIntersectionTime' SphereEntity is a declared as a subclass of Entity. Entity is an abstract class with two functions: render and getIntersectionTime. These two purely virtual functions of Entity were implemented in the SphereEntity class. I receive the error when I try to create an object of SphereEntity. Any help would be appreciated. Thanks CODE ------------------------- Entity.h ------------------------- //#ifndef Entity_H //#define Entity_H #pragma once #include <G3DAll.h> //#include "SphereEntity.h" // Entity class Entity { public: bool selected; Entity() : selected(false) {} virtual ~Entity() {} virtual void render(RenderDevice*)const = 0; // Returns amount of time to intersection starting at ray.origin and traveling with ray.velocity. virtual RealTime getIntersectionTime(const Ray&) const = 0; }; //#endif -------------------------------------------------------------------------- ------------------------- SphereEntity.h ------------------------- //#ifndef SphereEntity_H //#define SphereEntity_H #pragma once #include <G3DAll.h> #include "Entity.h" // SphereEntity : subclass of Entity class SphereEntity: public Entity { public: SphereEntity(Color4* _color, Vector3* _position, float _radius); virtual void render(RenderDevice*); virtual RealTime getIntersectionTime(const Ray&); private: Color4* _color; Color3* _wireColor; Vector3* _position; float _radius; Sphere *_sphere; // RenderDevice *renderDevice; // Vector3 outNormal; // Vector3 outLocation; }; //#endif -------------------------------------------------------------------------- ------------------------- SphereEntity.cpp ------------------------- #include "SphereEntity.h" SphereEntity:: SphereEntity(Color4* _color, Vector3* _position, float _radius){ this->_color = _color; this->_position = _position; this->_radius = _radius; _wireColor = new Color3(1,1,1); } void SphereEntity::render(RenderDevice* renderDevice){ //this->renderDevice = renderDevice; *_sphere = Sphere(*_position, _radius); if(selected == true){ _wireColor = new Color3(1, 1, 1); renderDevice->setRenderMode(RenderDevice::RENDER_WIREFRAME); } Draw:: sphere(*_sphere, renderDevice, *_color, *_wireColor); renderDevice->setRenderMode(RenderDevice::RENDER_SOLID); } RealTime SphereEntity::getIntersectionTime(const Ray& _ray){ double timeForCollision = 0; timeForCollision = _ray.intersectionTime(*_sphere); return timeForCollision; } Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 4
    - CoCreateInstance returns E_ACCESSDENIED on local machine Hi all, I'd like to use an interface provided by a third-party COM component on my local computer. But I failed with CoCreateInstance. Here is the piece of the code: CoInitialize(NULL); IXXX *p; GUID sourceobjID; HRESULT hr = ::CLSIDFromProgID(L"the ProgID of the lib", &sourceobjID); hr = CoCreateInstance(sourceobjID, NULL, CLSCTX_INPROC_SERVER, IID_IXXX, (void**)&p); .... I've tried CoInitializeSecurity, it doesn't work; And I've tried every kind of CLSCTX to fill in CoCreateInstance, only CLSCTX_INPROC_SERVER gives me s result of E_ACCESSDENIED, others give me Class not registered. I can see the type library in oleview. And my OS is XP with SP2. I'm running as administrator. Could anyone help me to find out the problem Thanks!! -Song Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 5
    - How do a create a new text file, and how do I insert an eof into it? Hi, I'm looking to create a new text file. I am in second term C++ so we're not using the MFC or anything. We have covered opening, reading, closing ifstream and ostream objects from fstream.h , but nothing about how to create a file if one's not there. Is this possible Also - anyone know how to insert an eof into a file through a text editor or something in Windows I am given to understand the eof flag is represented by a ctrl-Z but I can't insert this using textedit. In the mean time I'm using a pipe symbol '|' as my eof flag which is much less elegant. Thank you o wise sages of the code. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 6
    - CString format How can I compliet to zero if I have 14:3 --> 14:03 from these I get sNewMinute = ""; //sNewMinute.Format(minute, "%M"); //sNewMinute.Format(minute, "00"); Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 7
    - Buffer Size Dear Members, Am new to this group.I had one doubt in vc++ buffering concept My input code to read and write a text file is Wchar InputText[99999]=L" "; Wchar OutputText[99999]=L" "; Wchar Buffer[99999]= " "; I want to give a maximum buffer size value and my file size is around 5 mb Is it possible to do so, if yes how Please reply me to this question with regards, Prabhu K.m Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 8
    - how can i use random functions hello , i'm trying to make the minesweeper game as a console application and i wanna randomize 10 mines in a 2 dimension array of 2 variables (i & j) . 0 < i & j < 9 . the game is a board of (81) box (9*9) . that's all please help me . thnx . Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 9
    - A Pointer Function? I have a function with the purpose of passing an object to it by reference so that you can't edit the object and there's no copy constructor called to save memory, although, what's the purpose of: * const catTwo Code Snippet const Cat * const catTwo( const Cat * const theCat) { return theCat; } Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 10
    - How to implement user defined message in a Dialog box with a worker thread? I got MFC dialog with a worker thread. this worker thread this to get the position of the sliders and output them. obviously, my worker thread can't touch the sliders either directly or implictly. So i have to send notification message to somewhere which i'm not sure, to let some function outside the worker thread do the job. i'm not sure where to implement the message, for example: // CMultithreadingTestApp BEGIN_MESSAGE_MAP(CMultithreadingTestApp, CWinApp) ON_COMMAND(ID_HELP, &CWinApp: nHelp) ON_MESSAGE (WM_USER_GET_DATA, OnGetData)// <-Complier ERROR here ON_MESSAGE (WM_USER_THREAD_ABORTED, OnThreadAborted)// <-Complier ERROR here END_MESSAGE_MAP() if i implement this, i got error error C2440: 'static_cast' : cannot convert from 'LRESULT (__thiscall CMultithreadingTestApp::* )(WPARAM,LPARAM)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)' None of the functions with this name in scope match the target type if i implement the message between BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) .... END_MESSAGE_MAP() i'm afraid some deadlock will happen. read this section "Worker threads and the GUI II: Don't touch the GUI" of this article: http://www.flounder.com/workerthreads.htm Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 11
    - using excel type library in vc++2005 I tried to do the following example in vc++ 2005 but it wont comiple. It returns like 300 errors in excel.thl file. I havent even done the coding part, i just imported the CApplication.h and turned on the runtime support compiler option ( /clr:oldSyntax ) like the kb says and tried to compile.. help.. http://support.microsoft.com/kb/308407 Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 12
    - Small style problem with a button I'm pretty new to MFC, and having problems with the group box object. Using the resource editor, I created a form with a group box and a button. The group box is used in the DoDataExchange (DDX_Control(pDX, IDC_MYPANEL, myPanel)) of the dialog in order to use it with a custom class I created, which contains a reference to the button placed within the group box. Ex. //The custom class class MyPanel : public CButton { public: MyPanel(); private: CButton* myButton; } MyPanel::MyPanel() { myButton = this->GetParent()->GetDlgItem(IDC_MYBUTTON); myButton->SetParent(this); myButton->SetWindowPos(&CWnd::wndTop, 10, 125, 0, 0, SWP_NOSIZE); } Now, if the button remains the child of the dialog, then it appears normally. However, if I SetParent() to the group box on the button, then there is a thick black border around the edge of the button, which looks ugly. Also, in the SetWindowPos() call, if I specify either wndTopMost or wndNoTopMost, then the button just doesn't appear. Does anybody know why these things are happening Thanks! =) ~Eric Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 13
    - ProcessShellCommand fails in Vista Hi all, I was encountering a strange problem I never met before in vista. The problem is that I compiled my application and installed it in the Windows XP machine and it worked fine. However, after I installed it in the Windows Vista , it did not work. I tried to debug and find the cause of program failure being my AP simply can not even be initiated in Vista due to failure in ProcessShellCommand. It goes into ProcessShellCommand() and did not return, then Vista pops up a window telling me this application is not responding and I have to close it simply because it's not working. It's strange. I never had this problem before. Anybody has any idea how I should do to slove this problem, or any hint Any help is appreciated. By the way, I upgraded my projects from vs 2003 to vs 2005 with service pack 1, I don't know if that matters. Thanks. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 14
    - VS2005 SP1 and Fix for kb911281 I'm wondering if other people are still having this problem with SP1. I just installed SP1 and was very hopeful that the slowness of starting up would go away, but it definitely has not changed. There continues to be a huge difference in the time it takes to start my application (which has several 100 dlls that are loaded) between VS2003 and VS2005 SP1. With VS2003 this application can be started in the debugger in seconds (under 10 seconds, probably only 2 seconds on successive starts), while in VS2005 it can take several minutes to start up. Clearly I often have break points set, that is the point of debugging! Should I still be seeing this huge difference in loading times between VS2003 and VS2005 for large unmanaged applications Might it be because I have specified the Microsoft symbol server in VS2005 and I have not set that up in my VS2003 environment Could looking for symbols explain that I'm pretty certain though that in the past I have removed the symbol server from VS2005 in an attempt to speed up the loading process, and that was not helpful. Any other suggestions out there to make this loading more like it was in VS2003 Thanks in advance, -Eric Twietmeyer Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 15
    - Invoke throws an exception with VC8 ported code... Hi, I have upgraded vc5 ATL server DLL to vc8 and vb5 client to vb6. I have a VC8 Atl server dll that I would like to fire an event to then be used by VB6 using the With Events keyword. BUT when DLL raises event, it throws an exception at the following statement.. pDispatch->Invoke(0x1, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, NULL,NULL, NULL); It was working fine with my original source code in vc5 and vb5 client. Any ideas Thanks, Mac Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++
  - 16
    - What's exact messages sent when SetCapture() and ReleaseCapture() get called? Actually what I need is that I don't wanna others grab mouse capture from me anyway. So I have to check out all messages sent when SetCaputre and ReleaseCapture get called, then resume mouse captrue. So, what're these messages Thanks in advance. Tag: Visual C++ Language Passing template function to _beginthreadex Visual C++

dhelmer

I'm creating a new thread but I'd like to supply a templated function to beginthreadex.

My thread function prototype is:

template<typename T>
unsigned int _stdcall GetArrayThread(void* pvStruct)

However, when a supply: "GetArrayThread<IClass1>" as the 3rd parameter to _beginthreadex, the compiler gives the following error:

error C2664: '_beginthreadex' : cannot convert parameter 3 from 'unsigned int (void *)' to 'unsigned int (__stdcall *)(void *)'

Passing "&GetArrayThread<IClass1>" makes no difference.

All was fine when 'GetArrayThread' was not templated, and I simply passed "GetArrayThread" as the 3rd parameter to _beginthreadex

Does anyone know if templated functions can be supplied to _beginthreadex

Re: Visual C++ Language Passing template function to _beginthreadex

einaros

Which version of VC is this

Templated functions are functions like any other, once instantiated, so they work just fine with callbacks such as those accepted by beginthreadex. If you're using VC8, and you've got SP1 installed; that looks like a bug to me. I'd be amazed if no one has found this 'till now, though.

Re: Visual C++ Language Passing template function to _beginthreadex

alex.m

Hi!

I can't reproduce the bug on vc++ 2008 pre-release, could you add a snipet

A blind try: use "__stdcall" instead of "_stdcall"

Re: Visual C++ Language Passing template function to _beginthreadex

dhelmer

I really should have mentioned I was using C++ with VS 6.0.

Another interesting tidbit - I tried getting the compiler to explicitly generate a specific "instance" of the templated fn, by adding:

unsigned int _stdcall GetArrayThread<IClass1>(void*);

at file scope, prior to the method that calls _beginthreadex. That eliminated the compiler error, but then the linker generated:

unresolved external symbol "unsigned int __stdcall GetArrayThread(void *)" ( GetArrayThread@@YGIPAX@Z)

Based on the posted replies, I tried compiling and linking the original code with VS 2003. The problem is eliminated so I'm thinking it must be a bug the VS 6.0 version of C++.

Thanks.

Re: Visual C++ Language Passing template function to _beginthreadex

einaros

dhelmer wrote:

The problem is eliminated so I'm thinking it must be a bug the VS 6.0 version of C++.

This is one of many template / conformance issues with VC6, I'm afraid.