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- Win32 Thread Interleaving Hi, I read some post for win32 thread application and thought if you guys can hep us. we are developing trading platform for different exchanges and facing a strange problem. Our application creates two threads both threads are running for indefinate times (means there is no sleep in thread loop function). Thread 1 will always check the queue for possible work to be done and Thread 2 always listens the network broadcast. The code is something similar to void *ThreadAFunct(void *arg){ While(true){ int workAvailable = CheckQueue(); //.... if(workAvailable){ LockMutex(sharedMutex); //do some work UnLockMutex(sharedMutex); } //..... } } void *ThreadBFunct(void *arg){ while(true){ //..... LockMutex(sharedMutex); //ListenForBroadcast... UnLockMutex(sharedMutex); //........................ } } Both threads uses same mutex. and for acquiring and releasing mutex we are using EnterCriticalSection and LeaveCriticalSection functions. Now problem we are facing is, in windows XP hyper threaded processor, threads get the mutexes in just a few milliseconds and never had any problem with thread interleaving, threads releases after few milliseconds and other thread acquires mutex in very little time. But we are seeing different behaviour in windows 2003 server (SP1) hyper threaded machine. Thread doesn't interleave perfectly like XP, sometimes a thread runs for long time compare to other thread (I used timers and found out that Thread B gets most of the processor time compare to thread A.) And often (most consistantly and probably root of all these problems) thread A waits for very long time just for acquring mutex (sometimes more than a min some time just a second). I am not getting why it works perfectly fine in windows XP. The same application is running for over 3 months (on XP) but on windows 2003 it has these problems. One possible solution would be to put Sleep() in Thread B after reading certain number of broadcast. And it works but still can't get bottom of the problem. I wrote same program using WaitForSingleObject() and it works fine with that, so wondering it might be something to do with the CriticalSection functions. I even tried setting different values for Win32PrioritySepration but didn't worked. So any suggestion would be helpful. Thanks in advance Tag: Visual C++ General mouse event? Visual C++
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- Linker errors when compiling .Net 1.1 vc projects into 2.0 Hi, I am trying to compile a VC project which was developed in .net 1.1 into .net 2.0. This is working perfectly in .net 1.1. but during this compilation, it shows lot of linker erros which include the following error LNK2020: unresolved token (0A00008F) __native_vcclrit_reason error LNK2020: unresolved token (0A000095) __native_startup_state error LNK2020: unresolved token (0A0000E4) __native_startup_lock error LNK2020: unresolved token (0A0000E5) __native_dllmain_reason error LNK2001: unresolved external symbol ___native_dllmain_reason can anybody pls help me how to overcome these errors. also pls let me know why these kind of errors are coming. i also tried removing /Zl and /noentry but no use it seems. thanks and regards, ganesh.p Tag: Visual C++ General mouse event? Visual C++
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- /bigobj Andreas Fabri wrote: aren't these forums places to profit from experiences other developers made before Certainly if someone has experienced the problem you are having and has spent a lot of time before solving the problem then it is beneficial for everyone to get their discoveries. Most answers in these forums however are provided by volunteers that don't have time to do things that are as easy to do for them as the people asking for help. In this situation, it is easier for you to try to solve it yourself since you have the environment to try. Tag: Visual C++ General mouse event? Visual C++
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- Why SetLastError doesn't work? Hi, I am using Visual C++ 6 under Windows XP Professional 2002. I have a simple program, that catches an exception, sets a valid errorid using SetLastError and reads the errorid later somewhere else in the program using GetLastError. But the code that is returned from GetLastError is not what I set, as if SetLastError didn't work. To make sure that my SetLastError is the last one that sets the errorid for this thread, I wrote a test program. I set the error using SetLastError and read it immediately after using GetLastError, again the errorid was not set. During my experiments, though, it set the errorid once but I could not overwrite it again. GetLastError returned that same errorid in all subsequent program runs , although I was changing it in SetLastError! I restarted Windows and ran the program again, I got the same id! Here is my test code. It is a simple Win32 Console program: SetLastError(0); /* I change the value of this id in different tests. */ FILE *pFile = NULL; if ( (pFile=fopen("C:\\test.txt", "a")) != NULL ) { fprintf(pFile, "LastError=%d \n", GetLastError()); fclose(pFile); } I was wondering if there is a known issue with Set/GetLastError under Windows XP Pro. My original program is relying on this errorid. I would appreciate any thoughts/helps on this. Thanks, Firouzeh Tag: Visual C++ General mouse event? Visual C++
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- Non unicode app with unicode dll Thank you for answer. It's hard to debug this, but i debuged and problem is in file wincore.cpp line 2908. Code Snippet CWnd* pWnd = (CWnd*)pMap->LookupPermanent(hWndChild); ASSERT(pWnd == NULL || pWnd->m_hWnd == hWndChild); if (pWnd == NULL) { #ifndef _AFX_NO_OCC_SUPPORT // check if the window is an OLE control CWnd* pWndParent = (CWnd*)pMap->LookupPermanent(::GetParent(hWndChild)); if (pWndParent != NULL && pWndParent->m_pCtrlCont != NULL) { // If a matching control site exists, it's an OLE control COleControlSite* pSite = (COleControlSite*)pWndParent-> m_pCtrlCont->m_siteMap.GetValueAt(hWndChild); if (pSite != NULL) { CWnd wndTemp(hWndChild); wndTemp.m_pCtrlSite = pSite; LRESULT lResult = wndTemp.SendChildNotifyLastMsg(pResult); wndTemp.m_hWnd = NULL; return lResult != 0; } } #endif //!_AFX_NO_OCC_SUPPORT return FALSE; } // only OLE controls and permanent windows will get reflected msgs ASSERT(pWnd != NULL); return pWnd->SendChildNotifyLastMsg(pResult); LookupPermanent return NULL if dll is Unicode compiled, but regular CWnd if dll is not compiled with unicode character set. So next code go to if and here return FALSE, because this is not OLE control. Here is call stack: mfc80d.dll!CWnd::ReflectLastMsg(HWND__ * hWndChild=0x000a0b0e, long * pResult=0x0012ebe8) Line 2908 C++ mfc80d.dll!CWnd: nNotify(unsigned int __formal=12345, long lParam=1241000, long * pResult=0x0012ebe8) Line 2319 + 0xd bytes C++ mfc80d.dll!CWnd: nWndMsg(unsigned int message=78, unsigned int wParam=12345, long lParam=1241000, long * pResult=0x0012ed14) Line 1767 + 0x2a bytes C++ May be problem is when i create my control. Here is code how i create my control: Code Snippet tree = new CMyTree(); if (!tree->Create (WS_CHILD | WS_VISIBLE | TVS_HASLINES | TVS_SHOWSELALWAYS | TVS_LINESATROOT | TVS_HASBUTTONS | TVS_EDITLABELS | TVS_TRACKSELECT, lRectDummy, parentP, 12345)) { return false ; } parentP is window acquired from application (non-unicode). Any ideas what is wrong I'm using VS 2005. - Laco. Tag: Visual C++ General mouse event? Visual C++
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- Error compiling 64 bit VS 2005 __in is not recognized I actually had to include the "C:\Program Files (x86)\Microsoft Visual Studio 8\VC\PlatformSDK\Include" folder in the Tools->Options->->x64->Include Directories. This was counterintuitive because everything under "c:\Program Files (x86)\ is for 32 bit apps. Tag: Visual C++ General mouse event? Visual C++
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- Heap corruption ... bookysmell2004 wrote: Well, if you have someone above your head asking you to do this you rather do it ^^ Uhm also this is ment to be as more portable as possible. By definition of using a class, you are using C++. Nothing would be more portable using C++ than the std :: string class. Tag: Visual C++ General mouse event? Visual C++
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- Simple code: Which way is best practise? Tuk wrote: Is there too much to read ... Is the question unclear ... Is it not very interesting .... Other All of the above, sorry. Tag: Visual C++ General mouse event? Visual C++
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- [MFC] Menu problem Hi there! I'm creating an app with mdi interface, where child windows are created from custom class CSetupWnd derrived from CWnd. The problem is that I can't show a menu in these children windows! app is using dll SetupCore where CSetupWnd is declared and another project - SetupApp - uses it. When you click File/New item in main window it replaces its own menu with menu designed in SetupCore.dll - and the same menu should be also visible in child windows, but it is not! I've tried many ways to make he app work as I want, but nothing helps. Please write me a piece of example code that could help me. And sorry about my poor english Greets, Tag: Visual C++ General mouse event? Visual C++
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- Porting To Visual Studio 2005 Hello, I'm trying to port a program that was written in Visual C++ 6.0 to Visual Studio 2005. After not having much success I tried to port it to VS2003 and was able to get the program to work. I then took that port and tried to get it to work in VS2005 and was able to get most of it to function but one part. I have a edit box and a slider box, either one can be used, to enter a floating value between 0 and 1. When you try to select either a message pops up saying "Please enter a value between 0 and 1000" and you are not able to change any values before this message pops up, and then a debug assertion error is given. I have checked over all the math and it remains the same as the VC++6.0 and VS2003 that both work, and the only part of the code that was changed was when some pow() functions where used to solve and problem with ambiguity (I cast the values as being double since I am under the impression that VC++6.0 pow() fucntion could only take doubles) Any ideas of where to start would be great. Thanks Simon Tag: Visual C++ General mouse event? Visual C++
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- 'std' : does not exist or is not a namespace Every file in the project other than this file works fine with same directory settings. So is it be a problem.. .. in a header file , i found a line, #if !defined(AFX_PROPPAGE1_H__ C6F8F7C0_3380_49F1_B17A_72DC381C09AE__INCLUDED_) #define AFX_PROPPAGE1_H__ C6F8F7C0_3380_49F1_B17A_72DC381C09AE__INCLUDED_ what does the number (red colored) indicate. Is this is some kind of key or some thing other than that... thank you, Geo Tag: Visual C++ General mouse event? Visual C++
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- Member template function which takes member function pointer as non template parameter. Hello Brian Kramer, I had found a not-so-elegant workaround for these problems and I specified these workarounds in the bug report to MS of above links. It is somewhat incovenient and less intutive notation but works for VC71 and VC8. I just hope MS can incorporate fixes for these problem into VC8 SP1. By the way,while struggling for workarounds, I've found a better (means, more portable but still standard-compliant) approach than the suggested implementation by the original author, which does not use member function pointer as non-type template parameter and this new implementation doesn't seem to suffer from the same issues described above. template<class R, class T1> class delegate1 { struct fxn_table { R (*invoke)(void *, void *, T1); }; void * obj_ptr_; void * fn_ptr_; fxn_table * table_ptr_; template<class UR, class U1, class U, class T> struct method_stub { inline static void init(void ** fn_pptr, void ** obj_pptr, UR (U::*mfn)(U1), T * obj_ptr) { typedef UR (U::*TMFn)(T1); union { void * u_fn_ptr; TMFn u_mfn; }; u_mfn = mfn; *fn_pptr = u_fn_ptr; *obj_pptr = obj_ptr; } inline static R invoke(void * fn_ptr, void * obj_ptr, T1 a1) { typedef UR (U::*TMFn)(U1); union { void * u_fn_ptr; TMFn u_mfn; }; u_fn_ptr = fn_ptr; return ( static_cast<T *>( obj_ptr )->*u_mfn )( a1 ); } }; template<class UR, class U1, class U, class T> struct method_table { static fxn_table * get() { static fxn_table static_table = { &method_stub<UR, U1, U, T>::invoke, }; return &static_table; } }; public: template<class U, class UR, class U1, class T> void bind(UR (U::*mfn)(U1), T * obj) { method_stub<UR, U1, U, T>::init( &fn_ptr_, &obj_ptr_, mfn, obj); table_ptr_ = method_table<UR, U1, U, T>::get(); } inline R operator ()(T1 a1) const { return table_ptr_->invoke( fn_ptr_, obj_ptr_, a1 ); } }; It seems a just little bit slower than Don's fastest delegate or Sergey's fast delegate, but 5~10 times faster for invocation and 5~50 times faster for copying than boost::function. Thanks. Tag: Visual C++ General mouse event? Visual C++
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- RegSvr32 and global data and extern problem Thanks Sahir for your continued interest in this problem, it still exists... Yes a client makes calls to the COM DLL and the COM DLL links to an old legacy C DLL. The COM DLL implicitly links to the C DLL via its Lib file, although still uses the C DLL also. What i mean here it does not use LoadLibrary it uses the Lib file generated in conjunction with the DLL. I have tried all you have said: I do have the permissions - as stated if certian code is commented out then it is fine. This proves it finds the DLL ok and I have permissions. This also covers the Depends option which i have checked. Just the COM DLL depends on the C DLL, all dependencies after that are system ones. If i run regsvr32 from the CLI i get the following error message: LoadLibrary("MyCom.dll") failed - The specified procedure could not be found Again what procedure could not be found I isolated the code i thought was suspect and created a dummy C DLL and dummy client COM DLL to depend on this, but all ok. Any ideas greatly appreciated Tag: Visual C++ General mouse event? Visual C++
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- Open a new form from another form Hi all, I'm using VS2005, VC++ I want to open a new form form another form, and I also want to close the old form after new form open. Just like Form1>>open Form2>>close Form1 I try many ways, but it didn't work. THX! Tag: Visual C++ General mouse event? Visual C++
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- Doubly Linked Lists PeteJM01 wrote: LinkedList<Spell> spellbook; Firstly unlike other STLs like vectors this LinkedList did not like my Spell structure, and to top that it is not being accepted because the object that I am using to hold this varaible is native, so it can't use any of the system namespace stuff, Not without making it a reference class. PeteJM01 wrote: and I cant use STL because it does not seem to work with my windows forms stuff. What happened when you tried using the STL Can you show us the errors and related source code Tag: Visual C++ General mouse event? Visual C++
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- How to read image from MFC using image magick? Surezsu wrote: Hi all, I need to play with image magick on dialog based application of vc++(MFC) and i have installed the image magic(dynamic dll of binary version). when i use the below code snippet,got runtime error..... Code: Code Snippet #include Magick++.h #include iostream using namespace std; using namespace Magick; { Image img; img.read("c:\\logo.jpg"); } Error is: Unhandled exception at 0x000c256.. in sample.exe:0xC000075: Access voilation writing location 0xcde.... Anybody know the solution to this,please let me know as soon as possible.... Thankx in advance... First of all, your question is off topic here. For such questions, a magick++ related forum or newsgroup is better choice since vc++ folks may have no experience on magick++ at all. Secondly, when I did a quick search about magick++, I found this information that you are missing: " Please note that under Windows (and possibly the Mac) it is necessary to initialize the ImageMagick library prior to using the Magick++ library . This initialization is performed by passing the path to the ImageMagick DLLs (assumed to be in the same directory as your program) to the InitializeMagick() function call. This is commonly performed by providing the path to your program (argv[0]) as shown in the following example: int main( int /*argc*/, char ** argv) { InitializeMagick(*argv); This initialization step is not required under Unix, Linux, Cygwin, or any other operating environment that supports the notion of "installing" ImageMagick in a known location. " Tag: Visual C++ General mouse event? Visual C++
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- How make one object to be visible in two froms? I load one form from another and I want the object of the second form to be visible in the main.How to make that.I tried to make public but nothing... Tag: Visual C++ General mouse event? Visual C++
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- Visual C++ Path Hello, Well to that I will say, it depends on how serious you are. If you plan to do it, it will be a career long committment to a goal. In order to eventually achieve what you plan to do, I suggest taking Computer Science classes at college and specifically working on Masters level semester or year long projects. This will give you some basic idea of the level of effort required. It will also help you figure out where exactly you should look for resources. Full time professional experience at a good software company will also be very very helpful. thanks, Burhan Tag: Visual C++ General mouse event? Visual C++
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- Designer Custom Event with a Delegate Disappears from property window I am working inside Visual Studio 2005 and am having a terrible time with the designer and a custom event. What happens is when I double click on my custom event inside the property window the designer opens the code window and does everything it normally does when working with an event. I save all my wok close the form, and reopen return to look at my custom event it appears that it is no longer assigned However, clicking in the event window and using the drop down combo box I can reassign the event to my coded event. However saving again and closing and reopening the form once again reproduces the same results I have no problems posting my code I would prefer to actually email a zipped copy of my code to anyone interested in seeing it for themselves. I've made a silly program to work with this bug, so it's pretty small it's just a car with a little fuel gauge above it that runs across a windows form and runs out of gas (raising the event). The program works fine, it's just strictly a designer issue. Version Info: Microsoft Visual Studio 2005 Version 8.0.50727.762 (SP.050727-7600) Microsoft .NET Framework Version 2.0.50727 Tag: Visual C++ General mouse event? Visual C++
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- CRT assembly versions confusion :8.0.50608.0 vs 8.0.50727.42 Thank you both. I am convinced that the mismatch of the CRT assembly manifest version and the corresponding dll version is totally a Microsoft mess. There's no reason to keep the versions differently , as keeping the same version # is obviously the simplest way to check the correct dlls. However, in SP1, the CRT versions are identical between the manifest and the dlls. For any reason Well, if there is a reason here, the mismatch is unreasonable. Here's another confusion, I built a dll with the Beta version of VS2005 and an app with the RTM version of VS2005. Both of them are dynamically linked against the CRT. On a clean system without WinSxS, I copied the RTM version (8.0.50608.0) of the CRT manifest and its dlls to the app folder. Guess what, the dll is being loaded and functioning perfect! But the manifest embedded in the dll actually has a dependency on the CRT version 8.0.50215.4652!!! Shouldn't work, should it confusing. Could sb explain why my example is working Again, the dll and app are copied to a clean target system without any SxS and policies. Thanks, Zoom Tag: Visual C++ General mouse event? Visual C++
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- error C2668: 'pow' : ambiguous call to overloaded function in VC++ 2005 only here where i get the problem with pow function double CSampleGroupRecordView::CalculateErrors( long numberOfScansCompleted, double sumValue, double sqrValue) { double a, b, c, d; if (numberOfScansCompleted == 1) return 0.0; a = pow(sumValue, 2); c = pow(numberOfScansCompleted, 2); --->d = c * (numberOfScansCompleted - 1); b = pow((((numberOfScansCompleted * sqrValue) - a) / d), 0.5); return b; } does that means anything Tag: Visual C++ General mouse event? Visual C++
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- Convert string to LPCTSTR Hello All, I have been working on a application that will prompt a user to create a directroy on the file system. If I hard code the parameters the project will work. However when I try to cast a string variable to LPCTSTR I get an error. Here is a snippet of my code: Code Snippet string userDirectory; cout<< "Hello!\n" ; cout<< "Please enter the fully qualified path of the directory you would like to create: " ; cin>>userDirectory; LPCTSTR dir = (LPCTSTR(userDirectory)); Anyone know of a way to convert a string user input variable to a LPCTSTR type Kind Regards, O Tag: Visual C++ General mouse event? Visual C++
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- Running out of resources As mentioned, it was probably something unrelated. I ran the copy program again, then launched another program, and exited the other program while the copy program was running, and the copy program ran just fine. Regarding recursion, I have an array of global WIN32_FIND_DATA structures, handles, and pointers to source and destination path strings to deal with FindFirstFile / FindNextFile. The main working routine does call itself, but has no local variables and no paramters, so it's just the registers that get saved on the stack. I doubt the directory depth is even close to 32 deep, although I've set it up for 128. The recursion isn't really needed, and I'll probably eliminate it. For each directory, there are two main loops, the first loop processes all the files in the current directory (to keep all files of a directory together on the hard drive). The second loop processes all the directories in the current directory; for each time sub-directory, a global index is incremented, the paths are extended to include the sub-direcotry, and the code reverts back to the first loop for processing the files. A "goto" would work just fine, but I used recursion instead. It would be a minor change. As mentioned, the index and the arrays eliminate any real need for recursion. I'll test it again and confirm. Tag: Visual C++ General mouse event? Visual C++
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- This code snippet makes no sense... Simple Samples wrote: Bapa wrote: someClass *someFunction(&blah); I don't know what that is, except I think it is not valid code. You should create a small program you can use to test things like that and then post only valid code. If someClass is a defined class, there's nothing wrong with that syntax. It'll simply declare a variable someFunction, of type pointer-to-someClass, which is initialized with the address of blah. The problem, however, is that it will redeclare the symbol that is someFuction, and thus making the gloabal / namespace scope someFunction (which happens to actually be a function) unreachable. Tag: Visual C++ General mouse event? Visual C++
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- C++/CLI Tracking reference limitation Holger Grund wrote: Effectively, C++ native references translate to native pointers in CLR speak. It is perfectly possible to have a native pointer to an object of a generic parameter type. However, as you've probably noticed by now there are a lot of things in VC++'s CLR support that are less than perfect. By "native pointers" do you mean "T *" or "T ^" The problem in generic classes is that one can not have a member function that is T ^. The obvious reason for this is that T itself may be a ref class so that T ^ now becomes T ^ ^, which is impossible. That would be fine if one could than have T % as an alias for whatever T is. But even that is forbidden, for all CLR classes, which was the point of my OP. If in native C++ one can have a reference to any object as an alias for that object anywhere, it seems to me a great limitation of the CLR that one can not have a "reference" to any CLR object as an alias to that object anywhere. By "reference" in CLR I mean a tracking reference, %, in C++/CLI or the 'ref' keyword in C#. There are various idioms in which one wants to hold a reference to an object, in order to operate on that object later, whether that object in CLR is a ref class or a value class, in a generic way. One of these which I was hoping to implement is a type reset generic class, where an object of a type is passed to the class in its constructor along with optionally, via a second constructor, a value to which the object is reset. When the generic class is destructed (disposed ), the object is reset either back to a value or back to its default constructor value. This is impossible to do if one can not hold a tracking reference to the original object as a member of that class. The limitation of tracking references not being members of a class seems severe, since as I pointed out in my OP, any object which can be tracked clearly can be a member of a class, so it is really hard to understand why this aliasing limitation was established. Holger Grund wrote: The limitation, that managed pointers cannot be members comes from the CLR. I asked for functionality to overcome this quite early in the alpha days, basically supporting automatic allocation of objects of a given type and forcing all function calls inline. Brandon said they had considered and dismissed something like this. IIRC they called it "stackonly" types. I doubt that there is a good solution for your problem. You may be able to pin the underlying object via the library somehow, but then it won't be beautiful. -hg I am not sure if what you are mentioning as "managed pointers" is what I mention as "tracking references" but I will assume it is. I will play around with pinning pointers in a generic class, as you suggested, but I have small hope this will work. Why Brandon Bray said they dismissed the notion of "managed pointers" I of course do not know, or what "stackonly" types have to do with it, unless a member function of a class is considered "stackonly". I do realize that tracking references are more complicated than C++ native references, since tracking references can be rebound, and maybe this has something to do with the reason that the notion of tracking references as members of classes was dismissed. Of course, just like C++ native references I would say that tracking references as members of classes, if it had been accepted, would have to be set to some actual object upon object instantiation. Tag: Visual C++ General mouse event? Visual C++
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- Stack Trace Tools Hi, Is there any stack trace tools available for dumps generated in Test System. In fact, application running in the test was developed using Visual Studio 2005. Thanks in advance! Regards, Aru. Tag: Visual C++ General mouse event? Visual C++
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- Creating wmv Movie clips Hello all, I am designing an appliaction to stream video from video server in vc++6.I have created buffer for storing the bitmap bits of video in application.Can i create .wmv movie clips from these buffer In visual studio 2005 i can use Windows media format sdk for this purpose.How can i achieve the same thing in vc++6.Could any one suggest me Thanks in Advance. Adarsh Tag: Visual C++ General mouse event? Visual C++
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- Eventhandler is'n executed Hello. Code Block I have created a new class "CMessengerSocket" which is derived from "CSocket". The connection is build with the following code: void CDesktopChatMessengerApp::ConnectServer() { //Initialization m_NotificationServer = "messenger.hotmail.com"; m_NotificationServerPort = 1863; //Create connection CMessengerSocket* pMessengerSocket = new CMessengerSocket; m_pMessengerSocket = pMessengerSocket; m_pMessengerSocket->Create(); m_pMessengerSocket->Connect(m_NotificationServer, m_NotificationServerPort); } The connection is build successfully. (With "netstat" I can see the connection). Now, the eventhandler "CMessengerSocket::OnConnect()" should be called: The declaration: Code Block public: virtual void OnConnect(int nErrorCode); The overriden function: Code Block void CMessengerSocket::OnConnect(int nErrorCode) { // TODO: Add your specialized code here and/or call the base class if(0 != nErrorCode) { m_ConnectionFailed.LoadString(IDS_CONNECTION_FAILED); AfxMessageBox(m_ConnectionFailed); } else { //Call NewFrame() to create new mainframe theApp.NewFrame(); } CSocket::OnConnect(nErrorCode); } But I don't know why, the eventhandler isn't executed. There is no error while building. A-jage Tag: Visual C++ General mouse event? Visual C++
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- Using Visual Styles in VC++ 6 I wanted to display some caption text using the font of XP's current theme. One more thing I needed is, to draw lines using the color of current theme. Tag: Visual C++ General mouse event? Visual C++
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- Debug Executable size As einaros pointed out, this is really just a characteristic of Debug executables, which are built (by default) without any optimizations. Under VS2005, Debug executables are slightly larger than they were in 2003, however not so much that this should be a widespread problem. You can build a Debug version with some optimizations in place (such as "Optimize for size", "Enable string pooling", and so forth). This might help. Another option is to restructure your executable. Break out some functionality into DLLs so that no single module is over (for example) 1MB in size. This is good design and will often result in a smaller working set for your application, i.e., less page faults and overall better performance. Tag: Visual C++ General mouse event? Visual C++
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- Migrating application developed from Visual C++ 6.0 to Visual C++ 2005 I am planning to port an application developed using Visual C++ 6 to Visual C++ 2005. This application uses Stingray library and Oglite control library. This application was developed in 1998, so the library versions used were pretty old. I am just wondering will I be able to port my application at all Tag: Visual C++ General mouse event? Visual C++
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- Hard disk writing speed Hello I am working on writing data to hard disk continously for 1 hour. the writing rate is 15MBytes/s. i.e. 15KBytes in 10ms. OS is windows XP, harddisk is Seagate Ultra ATA. 7200 400G however by embeding some code for timing, I find sometimes writing 15KBytes into hard disk will cost 400 ms. I use some hard drive test software to test hard disk writing speed. it shows that the speed is 60MB/s. I use CFile class to create and write data into file. the code is below Code Snippet m_fWritingFile.Open(_T("d:\\test.dat"), CFile::modeWrite| CFile::osSequentialScan ); // I create a file before writing in order to save time for creating a file. someone says CreateFile and WriteFile would write faster. I dout it. WriteFile ? Making all writes sector aligned. In this case, no padding was done as the image size (1024x768) was a whole number multiple of the 512byte sector size. ? Writing all of the data from a single camera to a single file as opposed to having a single file for every image. Maintaining a relatively small number of files helps reduce the overhead associated with maintaining the file system. ? When using color cameras, only storing the raw bayer data as opposed to the larger color processed images. 1.5.2. Video card All of the PCI Express slots on the board were occupied with PCIe 1394 cards. The only slot available for a video card was a much slower PCI slot. As a result of this lack of bandwidth visual output from the software was kept to a minimum in order to avoid a number of performance issues. 1.5.3. Multiple cameras on a single bus At the time that this article was written, most 1394b host adapter cards suffered from an issue which prevented more than two 1394b nodes (1 camera + host adapter) to reside on the same bus. This issue is discussed in Knowledge Base Article 244 at www.ptgrey.com/support/kb/ . In order for Knowledge Base Article 244 at www.ptgrey.com/support/kb/ . In order for configurations involving more than a single 1394b camera on the same bus to be successful, users will have to insure that their 1394b card employs the TI TSB81BA3D physical layer. This will not be an issue for configurations involving a single camera on any given bus or for configurations involving 1394a cameras. Revised 5-Jan-07 Copyright c 2006 Point Grey Research, Inc. All rights reserved. 2 Tag: Visual C++ General mouse event? Visual C++
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silentHill
I would like to send mouse click on the position that is base on the active window. I can send a mouse anywhere on the screen with a given position, but I'm unable to send a mouse to a position based on the active window not the whole screen. How can I achieve that
Re: Visual C++ General mouse event?
einaros
If I'm interpreting you right, this is merely a matter of doing a calculation such as: Position within window = position on screen - position of window.
mouse_event has no knowledge of windows, so you should just offset your positions accordingly.
If I'm interpreting you right, this is merely a matter of doing a calculation such as: Position within window = position on screen - position of window.
mouse_event has no knowledge of windows, so you should just offset your positions accordingly.
Re: Visual C++ General mouse event?
silentHill
I see... So there is no such function that allows me to send the mouse position base on the active window position. The equation that you replied is that the correct one or you're just giving an example In either cases, what number or equation I should use
I see... So there is no such function that allows me to send the mouse position base on the active window position. The equation that you replied is that the correct one or you're just giving an example In either cases, what number or equation I should use
Re: Visual C++ General mouse event?
einaros
No, there's no such function. But it's really not a problem either. Just retrieve the windows base coordinates and add those to the position within the window. There's really not much more to it
No, there's no such function. But it's really not a problem either. Just retrieve the windows base coordinates and add those to the position within the window. There's really not much more to it