C / C++ / MFC

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How to get rid of ugly repainting process when resizing main window? s_k23-Jul-03 7:28 s_k 23-Jul-03 7:28  Hi, I've SDI application I start with SW_MAXIMIZE parameter passed to CFrameWnd::ShowWindow(). But I absolutely don't like that while the window is appearing on the screen, user can see its repainting progress (two ListViews changing their size, toolbar changing its size etc..). And it looks very ugly. Is there any way how to get rid of this? For example Visual C++ has very nice repainting when changing size/maximizing - there are no "intermediate stages" of repainting progress that could be seen by user. I think there must be some way how to do it - let all parts of application window (toolbars, views, ....) to find out their dimensions and placement BUT don't show main window untill this all is done! Hope someone will understand my problem... Thank you for any suggestion. Re: How to get rid of ugly repainting process when resizing main window? cmk23-Jul-03 8:07 cmk 23-Jul-03 8:07  There are 3 things to look at wrt window repainting/flickering : 1. WM_ERASEBKGND - if you are drawing the control and repaint the entire area in your WM_PAINT handler then don't do anything in WM_ERASEBKGND (and return 1). This avoids flicker caused by WM_ERASEBKGND filling control with background color then WM_PAINT painting actual control detail. 2. Again, if you are painting the control, then think about rendering the control to a bitmap then bliting the bitmap to the screen. 3. If you need to reposition a number of windows at once try using BeginDeferWindowPos(), DeferWindowPos(), and EndDeferWindowPos(). This is usefull for splitter windows. 4. (ok, 4 things to look at) For initial display you could create all windows hidden, position them, then make them all visible. Another way is to create main window offscreen then when children have adjusted their sizes, move main window onscreen. ...cmk Save the whales - collect the whole set Re: How to get rid of ugly repainting process when resizing main window? Tim Smith23-Jul-03 8:53 Tim Smith 23-Jul-03 8:53  The window class is handling that for you. If you are using MFC, window classes are generally hidden from you. The flags you want to change are CS_HREDRAW and CS_VREDRAW. These flags tell windows to repaint the window when it changes size. At least I think that is the case. Tim Smith I'm going to patent thought. I have yet to see any prior art. Re: How to get rid of ugly repainting process when resizing main window? Michael Dunn23-Jul-03 10:48 Michael Dunn 23-Jul-03 10:48  Additionally, make sure your view and controls have the WS_CLIPCHILDREN|WS_CLIPSIBLINGS styles --Mike-- "Big handwavy generalizations made from a position of deep ignorance is one of the biggest wastes of time on the net today. -- Joel Spolsky Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber C or C++? User 665823-Jul-03 7:23 User 6658 23-Jul-03 7:23  Hi I've been programming for about 4 years in C++ for fun, and I never really cared about that question. But now I'd like to know: What is "C" exactly, and what's the difference to "C++"? Is there any border? If I use functions like strlen, strcpy, strcat, fopen, fread, fwrite and use chars instead of std::string, do I program in "C" or "C++"? And what, if my program uses the Windows API? Could someone explain to me, or give me some links that cover this question in detail? thanks in advance modified 12-Sep-18 21:01pm. Re: C or C++? Rein Hillmann23-Jul-03 7:42 Rein Hillmann 23-Jul-03 7:42  That's a tough question to answer in a short amount of space. Here goes: The main difference between C and C++ is that C++ has support for classes whereas C only supports structs. Because of this, a vast number of libraries/extensions are not available for use in C. This includes STL and MFC amongst others. strlen, strcpy, strcat, fread, fwrite and char were all available in C. Obviously, the standard namespace was not. There are some language differences too, depending on the compiler, you can only declare variables in C at the beginning of you function. You can probably search Google for a complete list of syntactic differences. Most of the Windows API should work in C as far as I know. Personally, I prefer C - mainly for its purity, although I have been known to be a bit strange. Re: C or C++? apferreira23-Jul-03 7:44 apferreira 23-Jul-03 7:44  Try these articles, written by the Man himself (Bjarne Stroustrup, C++'s father) http://www.cuj.com/documents/s=8009/cuj0209stroustr/[^] http://www.cuj.com/documents/s=8011/cuj0207stroustr/[^] Re: C or C++? David Crow23-Jul-03 9:34 David Crow 23-Jul-03 9:34  Greg S. wrote: What is "C" exactly, and what's the difference to "C++"? In addition to the others, here are some useful links: http://www.research.att.com/~bs/bs_faq.html http://www.research.att.com/~bs/bs_faq2.html Greg S. wrote: If I use functions like strlen, strcpy, strcat, fopen, fread, fwrite and use chars instead of std::string, do I program in "C" or "C++"? You've not provided enough info for a sufficient answer. A C program can only use C code, but a C++ program can use both C++ and C. Consider the following .CPP file: #include < iostream > #include < stdio.h > void main( void ) { printf("Hello World\n"); } Is it C or C++? Some folks would call it a C++ program because of the file's extension. Others would say not since it uses no C++ constructs. What if printf("Hello World\n"); were changed to std::cout << "Hello World\n";? Does that make a difference? In some instances, I think it can be a difficult question to answer. Re: C or C++? User 665823-Jul-03 12:12 User 6658 23-Jul-03 12:12  Ok, seems like I'm programming with a mixture of C and C++, I use classes and sometimes std::vector, which don't exist in C, but I also use strlen, fwrite etc, C-functions. Seems to be hard to tell whether a piece of code is pure C or already C++. Thank you all, you helped me understanding this topic regards modified 12-Sep-18 21:01pm. Re: C or C++? Bob Stanneveld23-Jul-03 12:56 Bob Stanneveld 23-Jul-03 12:56  Ok, seems like I'm programming with a mixture of C and C++, I use classes and sometimes std::vector, which don't exist in C, but I also use strlen, fwrite etc, C-functions. If you look at the implementation some of those functions you'll be amazed that some are written in assembler! So would that make you an assembler programmer? What I think is: C++ is has OOP (Object Oriented Programming) support. If you would use it, you would be programming in C++. Then again, within those classes and member functions you use C code So what you shouldn't do is see C and C++ as 2 different languases, but see C++ as an extension to C ! In the end it all comes to 0's and 1's A student knows little about a lot. A professor knows a lot about little. I know everything about nothing. How can I use a VB library, in VC++ mr200323-Jul-03 6:45 mr2003 23-Jul-03 6:45  Hi, I have a VB library file which has many functions/constants. How can I use that in a VC++ program? Should I make a VB dll file, and include all of the functions in it? Ehsan Behboudi Re: How can I use a VB library, in VC++ AlexO23-Jul-03 6:47 AlexO 23-Jul-03 6:47  You have to covert it to COM library. Re: How can I use a VB library, in VC++ mr200323-Jul-03 7:40 mr2003 23-Jul-03 7:40  how can I do that? Ehsan Behboudi Re: How can I use a VB library, in VC++ mr200323-Jul-03 8:23 mr2003 23-Jul-03 8:23  ok i just checked,, the library is written according to COM. what should i do next? Ehsan Behboudi Re: How can I use a VB library, in VC++ AlexO23-Jul-03 8:30 AlexO 23-Jul-03 8:30  use #import "myvbcode.dll" during c++ compilation it would generate myvbcode.tlh myvbcode.tli which are automatically included then just select the functionality you need. If you need more help, publish generated .tli file here and example of how you would use it in VB. Re: How can I use a VB library, in VC++ AlexO23-Jul-03 8:38 AlexO 23-Jul-03 8:38  P.S. #import "libid:12341234-1234-1234-1234-123412341234" where 12341234-1234-1234-1234-123412341234 is you LIBID, is preferable. This way you do not depend on the location of the COM dll during compilation. Re: How can I use a VB library, in VC++ mr200323-Jul-03 9:19 mr2003 23-Jul-03 9:19  where in the VC++ program should I add #import "myvbcode.dll" ?? Ehsan Behboudi Re: How can I use a VB library, in VC++ AlexO23-Jul-03 9:48 AlexO 23-Jul-03 9:48  Stdafx.h usually is a good place. In general, it should be treaded as any other include file - you put right before the code that uses it. the actual #import "myvbcode.dll" is substituted at compile time for #include "myvbcode.tlh" #include "myvbcode.tli" IWebBrowser2 from IE HWND Paul M Watt23-Jul-03 6:40 Paul M Watt 23-Jul-03 6:40  Hi all, I need to get the IWebBrowser2 interface from the HWND for an IE control. Currently I am using Active Accessibility to get the IHTMLDocument2 interface from an HWND. Normally you can get the IWebBrowser2 interface from IHTMLDocument2 by querying IHTMLDocument2 for the IServiceProvider interface, then calling QueryService to get the IWebBrowser2 interface. This does not appear to work going through active accessibility. I believe this problem may have something to do with the set of objects that are marshalled with active accessibility. If anyone has been able to successfully go from an HWND for an IE control to the IWebBrowser2 interface, I would really appreciate your help and solution. Thank you Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! setup maker JensB23-Jul-03 6:39 JensB 23-Jul-03 6:39  Hi I'm desperately searching for a program who can create setups. All utils i've found until now who can do that, are with annoying company screens or with limitations (if you want to change this, get the professional edition .. arghhh) etc. Anyone found a very good one? or made one on its own? Let me know; Greetings Jens Re: setup maker AlexO23-Jul-03 6:46 AlexO 23-Jul-03 6:46  Do you mean that you do not want to pay for Wise or InstallShield and you are looking for freeware? There is free version of setup which comes with VS.Net , the problem is it does not have fancy UI and you really have to understand Installer SDK (available for free from Microsoft) Re: setup maker JensB23-Jul-03 6:51 JensB 23-Jul-03 6:51  Do you mean that you do not want to pay for Wise or InstallShield and you are looking for freeware? indeed, i have no desire to pay for a program who makes a setup. Don't need a fancy user interface, just the regular setup. Re: setup maker John M. Drescher23-Jul-03 7:11 John M. Drescher 23-Jul-03 7:11  www.innosetup.com[^] John Re: setup maker AlexO23-Jul-03 8:42 AlexO 23-Jul-03 8:42  it does not support win installer Re: setup maker John M. Drescher23-Jul-03 8:46 John M. Drescher 23-Jul-03 8:46  I dont think any of the free ones do and I believe that is a very good thing!! I have an application problem with the update for MSDE that everytime I reboot the pc it wants to reinstall MSDE. The thing is that it is fully installed and works fine... John

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