C / C++ / MFC

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Re: Sockets David Cunningham17-Mar-01 7:05 David Cunningham 17-Mar-01 7:05  Hi there, Just thought I should jump in and provide some clairification. Our Dundas TCP/IP package is available in a variety of formats, but is most commonly purchased as C++ source code. Although we don't directly support the package on non-Windows platforms, we estimate that about 10% of our users end up porting the library to Solaris or Linux (we hear it takes about a day or so of work to replace the Windows threading calls to those of the target platform and the Winsock calls to Berkely Sockets). I would encourage you to check it out, it will likely fit your needs quite nicely. http://www.dundas.com/index.asp?products/tcpip HTH, David Re: Sockets Peter Godec19-Mar-01 8:32 Peter Godec 19-Mar-01 8:32  Try SocketMan. It is'a free and portable C++ library, so it pretty much fits your demands . How I can do it !!! Ahmad16-Mar-01 21:44 Ahmad 16-Mar-01 21:44  HI ALL I want to draw circle on the screen(or desktop), I mean out of client window so I do like below : HDC hdc = CreateDC (TEXT ("DISPLAY"), NULL, NULL, NULL) ; it works but.................. then I do like below : InvalidateRect (NULL, &rc, TRUE) ; it erase the circle but.... When I use timer to draw circle and erase it quickly SetTimer (hwnd, ID_TIMER, 200, NULL) ; now the problem is apear when I erase the screen very quickly and repeatedly it makes the screen very shake ... How I can avoid this shake... THANK YOU AHMAD AL-WASHALI YEMEN washali@yahoo.com AHMAD ALWASHALI Re: How I can do it !!! l a u r e n16-Mar-01 23:32 l a u r e n 16-Mar-01 23:32  the 'shaking' is the natural flickering caused by erasing the bg and redrawing ... in games and other graphics programming a technique called 'double-buffering' is used essentially you grab 2 lumps of memory big enough for a copy of the screen each and draw to these ... when you are ready to show a newly updated image you blit that to the screen and avoid the erase step now if you are doing this for the whole desktop i think you may have a problem as the rest of the image will be changing beyond your control so it will be almost impossible to know what has moved where hmmmmm..... maybe you could use a borderless window that is transparent and set to the lowest z order and draw to that ... it would give the same effect but you wouldn't have to worry about other images in your client area and then could use the double buffering technique above --- "every year we invent better idiot proof systems and every year they invent better idiots" Re: How I can do it !!! Ahmad17-Mar-01 21:25 Ahmad 17-Mar-01 21:25  Thank you lauren . but can I erase the area which I draw in ,I mean not whole screen just the area which I draw in ... AHMAD ALWASHALI Re: How I can do it !!! l a u r e n17-Mar-01 22:52 l a u r e n 17-Mar-01 22:52  you don't draw directly to the desktop window at all you set up a window that has no border or title bar etc and that is transparent and draw to that ... it will look like it is being drawn to the desktop but in fact wont be hence you can do what you like to the window you own even if you have to copy the desktop to the window bg each time it will be far less data to copy than the whole desktop --- "every year we invent better idiot proof systems and every year they invent better idiots" Re: How I can do it !!! Ahmad19-Mar-01 21:49 Ahmad 19-Mar-01 21:49  THANK YOU VERY MUCH AHMAD ALWASHALI C++ question .. Hadi Rezaee16-Mar-01 19:44 Hadi Rezaee 16-Mar-01 19:44  <<< In the name of GOD >>> Hi. For indicate the variable kind of long in C++: long i; printf("%ld",i); Now, i want to indicate unsigned long variable, for example: 3147483647 How can i ? Hadi Rezaie Re: C++ question .. l a u r e n16-Mar-01 23:08 l a u r e n 16-Mar-01 23:08  either use unsigned long or DWORD --- "every year we invent better idiot proof systems and every year they invent better idiots" Re: C++ question .. Tim Deveaux17-Mar-01 4:22 Tim Deveaux 17-Mar-01 4:22  long x = 829137291; printf("unsigned long = %lu\n", x); If you look for 'printf format specifications' in the MSDN index you'll get lots of neat stuff. SetModifiedFlag() ... Hadi Rezaee16-Mar-01 19:43 Hadi Rezaee 16-Mar-01 19:43  <<< In the name of GOD >>> Hi. What is SetModifiedFlag function and when we using of it ? This is my answer : "Always call CDocument::SetModifiedFlag() after changing your document DATA." But what is knid of DATA ? Graphic data or File data or variable data or ... ? Hadi Rezaie Re: SetModifiedFlag() ... l a u r e n16-Mar-01 23:13 l a u r e n 16-Mar-01 23:13  your document is the place where the data for the app (or more correctly the document class) is stored / kept / buffered depending on what kind of app you are writing don't confuse a document in the mfc sense with a document in the word or excel sense although they are represented as mfc documents (probably) suppose you write a text editor that needs to know upon exit that the user modified the data in the view window ... on the event that changes the view data (or when you get the modified view data via ddx) you can set the mfc documents bModified flag to let the framework know the data changed you don't need to use it always ... i do in about half the apps i write --- "every year we invent better idiot proof systems and every year they invent better idiots" Re: SetModifiedFlag() ... Masaaki Onishi17-Mar-01 3:37 Masaaki Onishi 17-Mar-01 3:37  Hello, the codegurus around the world. Generally speaking, when we call UpdateAllViews(), and then OnUpdate() function of the views, this means that some data must be updated. In this case, we may add SetModifiedFlag(). In addition, if we works the complicated data structure, we usually use CObject derived class, and serialized this object. So, this may be problem. For example, what shall we do if the data are the same one after the user updated? the original data -> Updated data -> Updated data -> finally the same data as the original one. In this case, don't we call SetModifiedFlag()? The answer depends on the requirement... Or, we add the function to check the content of the data whenever the application calls UpdateAllViews(). That is, even though UpdateAllViews() is called and the data isn't changed, we don't need to call SetModifiedFlag()? In commercial level, it is better to call SetModifiedFlag() whenever UpdateAllViews() is called. Goodl luck! Have a nice day! -Masaaki Onishi- CWnd ... Hadi Rezaee16-Mar-01 19:41 Hadi Rezaee 16-Mar-01 19:41  <<< In the name of GOD >>> Hi. When CWnd is not attached to a window ? Hadi Rezaie Re: CWnd ... Ahmad16-Mar-01 21:18 Ahmad 16-Mar-01 21:18  can you make your question more clear ,please !!! AHMAD ALWASHALI Re: CWnd ... Tim Deveaux17-Mar-01 15:24 Tim Deveaux 17-Mar-01 15:24  A CWnd doesn't have a valid m_hWnd until one of Create, Attach, FromHandle, etc is called, and can lose it if that hwnd is killed - say by a call to DestroyWindow. Run function in class ... Hadi Rezaee16-Mar-01 19:40 Hadi Rezaee 16-Mar-01 19:40  <<< In the name of GOD >>> Hi. I have stupid question, but i really didn't understand. What mean code in L1 line ? BOOL CTestDlg::OnInitDialog() { L1: CDialog::OnInitDialog(); return TRUE; } Does this code is for, running OnInitDialog function again ? It mean OnInitDialog will run twice ? Other example: void CTestDlg::OnOK() { L1: CDialog::OnOK(); } Please explain to me ... Hadi Rezaie Re: Run function in class ... Ahmad16-Mar-01 21:15 Ahmad 16-Mar-01 21:15  HI Hadi_Rezaie BOOL CTestDlg::OnInitDialog() { L1: CDialog::OnInitDialog(); return TRUE; } that didn't mean running OnInitDialog function again . befor dialog is being visible you need to do some thing like initial your varibles or add icons ....etc this is your initial in BOOL CTestDlg::OnInitDialog() but base class ( CDialog )has some initial so you most call initial in base class : L1: CDialog::OnInitDialog(); I hope that's enough and sorry if I have mistakes (I didn't speak english very well) AHMAD ALWASHALI YEMEN washali@yahoo.com AHMAD ALWASHALI MFC RepositionBars - memory consumed Sara Burns16-Mar-01 13:50 Sara Burns 16-Mar-01 13:50  I have an MFC project which uses 2 views decended from CScrollView. I find that after each exit from CMainFrame::RecalcLayout my total memory allocation has increased by about 220bytes. This appears to happen during the processing of the RepositionBars function. I observed this while trying to find memory leaks using CMemoryState. I eliminated the leaks from my code but still seem to have this within "windows or MFC" code. Does anyone know how to prevent this as this function is run everytime I swap between the views. My project is expected to be in use over an extended time so a gradual increase in memory usage is a concern. It does appear to be given back once the program completes. Sara Re: MFC RepositionBars - memory consumed l a u r e n17-Mar-01 3:05 l a u r e n 17-Mar-01 3:05  "...derived from cscrollview..." ... are you sure the derived classes are not snaffling some memory away that is escaping detection? i would think (although it is entierly possible) that cscrollview would be fully tested and debugged by now as it is rather an 'old' class maybe you have a resource that isn't being released or something more exotic than straight memory allocs that are going awry --- "every year we invent better idiot proof systems and every year they invent better idiots" Property Sheets in CDialogBar Rob Planche16-Mar-01 8:45 Rob Planche 16-Mar-01 8:45  Does anyone out there now how to create a property sheet within a Dialog Bar? I have tried several different approaches, with no luck. I would really appreciate any advice, maybe this is not possible, if so let me know. If it is and you've done something like this please share with me how. Thanks, Rob Monitoring incoming calls 16-Mar-01 7:00 16-Mar-01 7:00  I'd like to program an app that can monitor incoming calls on my phone and display caller-id (if available). I think it has to be done with TAPI, right? Can anyone help me? thanks in advance Re: Monitoring incoming calls 16-Mar-01 7:14 16-Mar-01 7:14  There are plenty of examples in the platform SDK. I did some TAPI work about 3 or 4 years ago. We had an idea for an internet/TAPI product, but it didn't get past the prototype stages. That was using TAPI 2.0, which I don't remember much of. TAPI is up at V3.0 I think so, you'd best look at the docs. I think for callerID you may need a specialist card unless modems can do that now (couldn't when I last tried, but like I said, that was a while ago). Stephen Kellett Re: Monitoring incoming calls 28-Apr-01 2:43 28-Apr-01 2:43  i like to send voice from my vc++ application to telephone. i connect my application with the telepone using tapi but i am unable to the voice. help me. bas Re: Monitoring incoming calls 28-Apr-01 6:19 28-Apr-01 6:19  I did a TAPI project a while back and found that I was better off in the long run to buy an Active-X component which is tested and known to work rather than try to reinvent the wheel. Depending on the environment you must live in, telphony testing can be a pain. I use SAX Comm Objects and it works well for both outbound and inbound calls. I don't think Caller ID is part of Sax Comm. Paul Burton

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