C / C++ / MFC

FirstPrevNext

Re: Libraries linkage question Gary R. Wheeler21-Dec-08 2:36 Gary R. Wheeler 21-Dec-08 2:36  You can't change the size of the array. The libraries only 'know' the size of the array that was in effect when they were originally compiled. Software Zen: delete this; Fold With Us![^] Developping an advenced multi-client chat Part 1 Mustapha Rédouane21-Dec-08 1:58 Mustapha Rédouane 21-Dec-08 1:58  Hi experts! well as i'm developping an advenced chat application using MFC winsock (VS2005) under windows Vista and windows XP, i faced some problems,i could solve some of it, however i couldn't solve other problems.. - the first problem is when the client opens a public chat room or any other window, the rest of application must stay responsive and the user can access it! the problem is when i use DoModal method for the dialogs or any similar method (that have it's own message loop!) the main window is not responding anymore! - tried solutions: i tryed UI threads but i still have the same problem! wel hope you have a solution for me.. (maybe about Non-Modal dialog boxes or so..) (just an example: i want sth like in yahoo messenger where the user can open many windows and still able to use the main window or any other window) waiting for your answers Some People dream of success while others woke-up and are working to get it.. create many dialogboxes and the amin window is still responsive Mustapha Rédouane21-Dec-08 2:15 Mustapha Rédouane 21-Dec-08 2:15  For short, how to create many dialogboxes and the main window stays responsive and i can acces any shown window (like the messenger chat) Re: create many dialogboxes and the amin window is still responsive Stuart Dootson21-Dec-08 2:20 Stuart Dootson 21-Dec-08 2:20  Modeless dialogs[^] are what you want. Re: create many dialogboxes and the amin window is still responsive Mustapha Rédouane21-Dec-08 22:16 Mustapha Rédouane 21-Dec-08 22:16  Thank's bro, that's it, it works now.. Using MFC's socket within the Process' threads AmitCohen22220-Dec-08 23:40 AmitCohen222 20-Dec-08 23:40  Hi all ! I'm using the MFC sockets mechanism for TCP\IP communication (CSocket, Srialization ability etc.) in a Process that spawns some threads. It works fine until I deliver the socket pointer to one of the threads created by this process so that it can use it to send messages through this socket too - the application then fails, and if I understand correctly it is since the only thread allowed to use this socket is the one created it (in my case the main process). I'm looking for an elegant solution to this limitation (I can go around the problem in several ways but it might affect the complexity and run-time of the program). Any suggestions ??? Thanks in advanced, Amit Re: Using MFC's socket within the Process' threads CPallini21-Dec-08 0:05 CPallini 21-Dec-08 0:05  You secondary thread may possibly post messages to the primary one and let the latter do socket processing. If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke [My articles] Re: Using MFC's socket within the Process' threads Mark Salsbery21-Dec-08 5:19 Mark Salsbery 21-Dec-08 5:19  ...or you can stop using CSocket (it's really only a useful class for the most basic socket application) and use CAsyncSocket instead. If you'll be using the same socket from different threads, you'll want to use events instead of window messages for socket notifications. Mark Mark Salsbery Microsoft MVP - Visual C++ Re: Using MFC's socket within the Process' threads L. Madhavan21-Dec-08 18:50 L. Madhavan 21-Dec-08 18:50  AmitCohen222 wrote: if I understand correctly it is since the only thread allowed to use this socket is the one created it Not exactly, it's got to do with a bug in MFC. See knowledge base Q193101[^] - I had a similar problem and calling AfxSocketInit() in each thread fixed it. Re: Using MFC's socket within the Process' threads Mike O'Neill22-Dec-08 13:25 Mike O'Neill 22-Dec-08 13:25  That bug appears only when linking statically, and is probably not the cause of the problem. For a solution on using a CSocket object in a thread different from the thread that created it, see "How to pass a socket connection between threads in an MFC application in Visual C++" at http://support.microsoft.com/kb/175668[^]. Basically, you need surround the thread hand-off with calls to CAsyncSocket::Detach() and CAsyncSocket::Attach(). Mike Re: Using MFC's socket within the Process' threads L. Madhavan22-Dec-08 19:03 L. Madhavan 22-Dec-08 19:03  Oh yes, I missed that point. You do need to detach the original socket. help me to describe this code plese auralius manurung20-Dec-08 22:02 auralius manurung 20-Dec-08 22:02  plz help me with this code... <br /> int a = 0;<br /> int p = 2;<br /> int q = 3; <br /> <br /> a += p ? q : 0;<br /> what does the last line mean? i need to describe it into normal if-then-else form... thanks all... From Indonesia with love..!! Re: help me to describe this code plese Garth J Lancaster20-Dec-08 22:54 Garth J Lancaster 20-Dec-08 22:54  the form p ? q : 0 is expr1 ? expr2 : expr3 means evaluate expr1. If it is not zero, the value of the whole thing is expr2; otherwise the value is expr3. so, substituting 0 += 2 ? 3 : 0 since 2 ! = 0 0 += 3 a = 3 ... 'g' Re: help me to describe this code plese CPallini20-Dec-08 23:34 CPallini 20-Dec-08 23:34  The code maybe translated into (see documentation [^]): if ( p != 0 ) { a = a + q; } BTW you really need a good C/C++ tutorial. If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke [My articles] Re: help me to describe this code plese auralius manurung21-Dec-08 2:28 auralius manurung 21-Dec-08 2:28  yaa... you may be right... thank to you guys for the help... From Indonesia with love..!! ListCtrl AticAtac20-Dec-08 14:00 AticAtac 20-Dec-08 14:00  Hi, i am using CListCtrl in Icon-mode. I am setting the item positions manually with ListView_SetItemPosition32(). I am having a strange bug, y-positions between 0xf000 and 0xffff are not set properly ! Is this a known bug or am i doing something wrong ? Re: ListCtrl CPallini20-Dec-08 22:53 CPallini 20-Dec-08 22:53  Could you please post the relevant code? If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke [My articles] Re: ListCtrl AticAtac24-Dec-08 10:06 AticAtac 24-Dec-08 10:06  The code is pretty easy, i did this inside my CListCtrl class: ... ListView_SetItemPosition32(this->m_hWnd, 0, 0, 0xf100); POINT p; GetItemPosition(0, &p); ... and you will see that p doesn't contain the values i set before! Re: ListCtrl Hamid_RT21-Dec-08 4:44 Hamid_RT 21-Dec-08 4:44  Did you use of debugger? Of one Essence is the human race thus has Creation put the base One Limb impacted is sufficient For all Others to feel the Mace (Saadi ) Re: ListCtrl AticAtac24-Dec-08 10:08 AticAtac 24-Dec-08 10:08  Debugger doesn't help much, because the item-position is sent via SendMessage to ListCtrl. So its something going wrong inside windows api and not a fault of mfc. CBitmap CreateBitmapIndirect() fails Vaclav_20-Dec-08 13:09 Vaclav_ 20-Dec-08 13:09  This simple code fails and there is no extended error message. The BITMAP data is there and correct. CBitmap *bmp = new CBitmap(); if(!bmp-&gt;CreateBitmapIndirect((BITMAP * ) m_Doc-&gt;m_lpBi)) { ..... PS Ignore -&gt; it is "->" in original!!! Any constructive suggestion on how to debug this is appreciated. Thanks for reading. Cheers Vaclav Re: CBitmap CreateBitmapIndirect() fails Stuart Dootson20-Dec-08 13:19 Stuart Dootson 20-Dec-08 13:19  Did you install the CRT and MFC source code? If so, you can step into the MFC implementation code (so long as you're working with a Debug build) and find what Win32 call is failing. That might give you some more information. Only thing I can think of, apart maybe from finding some sample code, to see if there's anything you're missing? Re: CBitmap CreateBitmapIndirect() fails Vaclav_20-Dec-08 15:21 Vaclav_ 20-Dec-08 15:21  This fails in otherwise working MFC document / view program. And no I cannot step into the API. Thanks Re: CBitmap CreateBitmapIndirect() fails Jijo.Raj20-Dec-08 15:33 Jijo.Raj 20-Dec-08 15:33  May be GetLastError() can give you some hints. Just add @err,hr to the watch window to get the last error description. Regards, Jijo. _____________________________________________________ http://weseetips.com[^] Visual C++ tips and tricks. Updated daily. Re: CBitmap CreateBitmapIndirect() fails Mark Salsbery21-Dec-08 5:24 Mark Salsbery 21-Dec-08 5:24  Vaclav_Sal wrote: if(!bmp->CreateBitmapIndirect((BITMAP * ) m_Doc->m_lpBi)) I'm suspicious about that cast - why did you need to cast to a BITMAP*? Based on the limited info, I have a feeling you're not passing the correct structure... Mark Mark Salsbery Microsoft MVP - Visual C++

Last Visit: 31-Dec-99 18:00     Last Update: 6-May-24 12:12 Refresh ᐊ Prev1...3719372037213722372337243725372637273728 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.