C / C++ / MFC

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Re: While terminating application a error is displayed.... newneo10-Jun-02 20:02 newneo 10-Jun-02 20:02  Thanx for reply mr Rama krishna and Nish further regarding my application problem is that call stack gives this information Call Stack: MFC40! 6c6e5009() MFC40! 6c701124() COleDispatchDriver::~COleDispatchDriver() line 85 + 15 bytes MoPoints::~MoPoints() + 20 bytes $E349() + 19 bytes doexit(int 0, int 0, int 0) line 353 exit(int 0) line 279 + 13 bytes WinMainCRTStartup() line 345 KERNEL32! 77e97d08() Thankx a lot hope u will give me more tips on this.. smarty_sagar@rediffmail.com Thanx once again Neonave Re: While terminating application a error is displayed.... Nish Nishant10-Jun-02 21:42 Nish Nishant 10-Jun-02 21:42  I am not very sure about this but looks like you are not uninitializing some activex control! Nish Author of the romantic comedy Summer Love and Some more Cricket [New Win] Buy it, read it and admire me Re: While terminating application a error is displayed.... newneo11-Jun-02 0:39 newneo 11-Jun-02 0:39  Thanx again for reply I found that we are not using OLE component properly so may be that error is coming.. Can any one help me on ColeDispatchDriver . This is where the error is occurring ,,as some one is developed the code and I am fixing the bug morever I am new to vc++ ,,so having some tough time with this,, Can any one help me out with this… Code some what look like this // COleDispatchDriver _AFXDISP_INLINE COleDispatchDriver::~COleDispatchDriver() { ReleaseDispatch(); } _AFXDISP_INLINE COleDispatchDriver::operator LPDISPATCH() { return m_lpDispatch; } I hope some one will come further and help me out with this.. Thanks in advance,, Neonave Re: While terminating application a error is displayed.... Rama Krishna Vavilala11-Jun-02 1:02 Rama Krishna Vavilala 11-Jun-02 1:02  You have a Global Object of COLeDispatchDriver. You need to Release it in the ExitInstance of your CWinApp derived class. Let's say the name of the variable is g_Dispatch. In the ExitInstance call g_Dispatch.ReleaseDispatch This will fix the problem Help - C++ and Skinnable kulwen10-Jun-02 17:20 kulwen 10-Jun-02 17:20  Can anyone give me any info or good sites to obtain information on creating C++ programs that are skinnable? I am currently a student starting my C++ intro class. And I do not want to create the same plan programs as the rest of the class. Thank you, Kulwen Re: Help - C++ and Skinnable Christian Graus10-Jun-02 17:35 Christian Graus 10-Jun-02 17:35  There are at least two articles here on CP. Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 "unplug or eject hardware" in application Eric Lee10-Jun-02 16:46 Eric Lee 10-Jun-02 16:46  Hello friends, User can stop the device through the "unplug or eject hardware" application (on the taskbar) in Windows 2000. How can I use this function and stop the device in my application ? Please give me a suggestion, thanks a lot! Good day. Eric Lee WH_CBT and menus Roman Nurik10-Jun-02 15:47 Roman Nurik 10-Jun-02 15:47  im using a WH_CBT hook (passing in the value from GetCurrentThreadId() in SetWindowsHookEx)... and im catching the message HCBT_CREATEWND. now, im trying to catch the creation of ALL menus in my program, but only some are caught: 1) the top menu i click on first to enter the menu loop is NEVER caught in my hook 2) the right-click menu in the caption bar almost always gets caught 3) the other main menus sometimes get caught in the hook can someone explain what i'm doing wrong, or lead me to an example/tutorial? thanks - Roman - Memory Leak due to Memory context moswal10-Jun-02 15:32 moswal 10-Jun-02 15:32  My application has a serious memory leak problem. It is because I am not able to release the memory consumed by the memory context. In general I save an image in 2 memory context variables. One is used to hold latest data and the other one holds previous data(used for undo purpose). I process the image in the memory context and after processing i display it on the device context. I am reusing the same memory context variables for processing the image. But i believe reusing of memory context causes memory leaks therefore i thought I would the image information in an array. I will process that array and save in the memory context and then display it on the device context. But in order to do this I tried the following ways to release the memory consumed by the memory context. 1) memDC.SelectObject(oldbmp); 2) ReleaseDC(memDC); 3) memDC.DeleteDC(); But i am still facing the memory leak problem. Please confirm if reusing memory context is possible and how to release the memory consumed by the memory context. Thanx in advance. Einstein's Assistant Re: Memory Leak due to Memory context Christian Graus10-Jun-02 16:57 Christian Graus 10-Jun-02 16:57  you're creating and deleting the DC over and over ? Why ? I don't see why you could not have a CDC as a member, and I'd suggest your leak is elsewhere, probably to do with the way you handle bitmaps. What OS are you using ? W2000/XP catch GDI leaks for you, and W98 comes with a tool to watch GDI leaks specifically, so you can see if that is what you are leaking. You'll know soon enough, because your whole system will stop drawing stuff ( buttons, windows, etc. ) Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 Re: Memory Leak due to Memory context moswal10-Jun-02 23:00 moswal 10-Jun-02 23:00  I am working Win2K. Currently I am not deleting the DCs. I am just reusing the memory context to bitblt the processed output to the screen. I realized that my application has a leak by using windows task manager. And after lot of memory is consumed for pull down menus i just see black box. So I guess it is GDI memory leak. I am not creating and deleting DC over and over again. I just create them once when a image is opened. I.e I call the saveimg method which saves the image in the memory context. I want to release memory used by memory context because I fear that reusing memory context is one of the cause of memory leak. To work around this problem I thought I would copy the pixel color values in an array and then release the memory consumed by the memory context. But unfortunately I am not able to release the memory by any the three methods. Thanx in advance. Einstein's Assistant Re: Memory Leak due to Memory context Christian Graus10-Jun-02 23:14 Christian Graus 10-Jun-02 23:14  moswal wrote: I am working Win2K. Therefore you are not leaking GDI resources - Win2000 will clean them for you, as I said. moswal wrote: I realized that my application has a leak by using windows task manager. And after lot of memory is consumed for pull down menus i just see black box. So I guess it is GDI memory leak. Not under W2000. moswal wrote: But unfortunately I am not able to release the memory by any the three methods. I'm pretty sure that's because you're barking up the wrong tree. Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 Re: Memory Leak due to Memory context moswal10-Jun-02 23:46 moswal 10-Jun-02 23:46  But is it true that reusing Memory context object does not cause any memory leak. Thanx in advance Einstein's Assistant Re: Memory Leak due to Memory context Christian Graus10-Jun-02 23:50 Christian Graus 10-Jun-02 23:50  Yes, that is also true, so long as you manage it's state effectively. Either way, the point is that this is not your problem in this case. Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 Re: Memory Leak due to Memory context moswal15-Jun-02 22:06 moswal 15-Jun-02 22:06  Hi, I am still unable to pin down the source of memory leak. If I upload my source code can u help me to solve the memory leak problem. Thanx a lot in advance. Einstein's Assistant Re: Memory Leak due to Memory context Christian Graus15-Jun-02 23:27 Christian Graus 15-Jun-02 23:27  Of course. Reask the question as a new post, so others see it too, in case I don't spot the problem. Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied. - Alex, 13 June 2002 Re: Memory Leak due to Memory context moswal27-Jun-02 22:49 moswal 27-Jun-02 22:49  Hi again, I uploaded my whole application in yahoo's briefcase. Please go through it and help me spot the source of memory leak. Thanks in advance. userid : moswal0071 password : cooldude Einstein's Assistant VC.Net, const member functions, and more... Abin10-Jun-02 15:30 Abin 10-Jun-02 15:30  Finally I got my .Net copy today, after 2 hours of installation and woohooooo I'm using .Net! But wait, cannot create a VC++ project, "VC package is unavailable or not registered.", I guess that's because my old VC++ 6.0 is still on this machine, so I removed VC++6.0 and REINSTALLED .Net, there went another 2 hours(who cares since I don't have school today), now it's working! I spent a little time to play with the new VC++ IDE, it's cool and all, but I quickly found something different. The first thing is that I cannot assign "const" keyword to member functions when I create them using "Add->Member function", I have to add "const" keyword manually to both header file and cpp file after the member functions have been created, which sounds awkward to me. Another thing, it's no big deal but still makes me somewhat annoying. In VC++ 6.0 we can delete a function by right-clicking on the function name(on "Class view") and selecting "delete", it will automatically remove the function definition in header file and comment implementation out in cpp file, very convenient, now this feature is gone, or that I cannot find it existing. If anyone know how to solve those problem in .Net VC++ IDE please let me know. Thanks. Re: VC.Net, const member functions, and more... Christian Graus10-Jun-02 16:46 Christian Graus 10-Jun-02 16:46  You are better off adding things by hand anyhow - they were probably removed because the wizards that did them were notorious for stuffing up. I don't even use a wizard to add interfaces to an ATL object - I like to do it by hand and know exactly what is going where. The ATL wizard is notorious for dying half way through and leaving fragments throughout a project. Christian I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002 appliction freezing.. 10-Jun-02 15:13 10-Jun-02 15:13  how can i stop my application from freezing when its processing a function? any help will be greatful. Thanks. Re: appliction freezing.. Roman Nurik10-Jun-02 15:47 Roman Nurik 10-Jun-02 15:47  put it inside a thread... look up CreateThread on Platform SDK or check out one of the system sections on CP - Roman - Re: appliction freezing.. 10-Jun-02 16:12 10-Jun-02 16:12  got any examples on CreateThread?;P Re: appliction freezing.. Le centriste11-Jun-02 3:40 Le centriste 11-Jun-02 3:40  You should rather use _beginthread[ex]. Look in MSDN for example. Michel It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to. - TreeBeard Image transformations SuperGeek10-Jun-02 14:20 SuperGeek 10-Jun-02 14:20  I am facing two problems: 1) displaying and scaling image files of *.TIFF, *.BMP, *.JPG formats 2) conversion of grayscale images into bitonal representations (smaller size, better compression). Does anyone know about any cool open source graphics libraries, algorithms, etc... Thanks a bunch in advance. Kirill Re: Image transformations moswal10-Jun-02 15:45 moswal 10-Jun-02 15:45  Hi, Try this url. It gives you all the information that u need. In fact the whole application does exactly what u want. http://www.codeguru.com/bitmap/CPicture.html I suggest you use GDI+ libraries. They are really to use and you can save,load and modify the images much more easily compared to the method used by the author of CPicture class. Einstein's Assistant

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