C / C++ / MFC

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Alter the dimensions of a metafile Dimitris Vikeloudas19-Jan-05 0:46 Dimitris Vikeloudas 19-Jan-05 0:46  Hi I use the CreateEnhMetaFile to create an enhanced metafile. The third parameter is the rectangle which give me the sizeo of the metafile. Is it possible to alter that side after the creation? This will allow me to scale better my metafile. Ideally I am locking for something like: CMetaFileDC * pDCMetaFile = .....; pDCMetaFile->CreateEnhanced(p_dc, filename.data(), &rect, NULL); rect = new sizes; pcDCMetaFile->alterSize(rect); Thanks a lot Always try to keep things as simple as possible Re: Alter the dimensions of a metafile Shog919-Jan-05 8:53 Shog9 19-Jan-05 8:53  Not sure what you're trying to accomplish - you can draw a metafile into any size area you desired. The size passed to CreateEnhanced() is more for future reference than anything else, it isn't enforced. Shog9 I'm not the Jack of Diamonds... I'm not the six of spades. I don't know what you thought; I'm not your astronaut... error LNK2019: unresolved external symbol "public: __thiscall aj168219-Jan-05 0:44 aj1682 19-Jan-05 0:44  In the build stage I get these errors HPMumsCtl.obj : error LNK2019: unresolved external symbol "public: __thiscall CParser::CParser(void)" (??0CParser@@QAE@XZ) referenced in function "public: __thiscall CHPMumsCtrl::CHPMumsCtrl(void)" (??0CHPMumsCtrl@@QAE@XZ) HPMumsCtl.obj : error LNK2019: unresolved external symbol "public: double __thiscall CvsAwk::GetVal(void)" (?GetVal@CvsAwk@@QAENXZ) referenced in function "public: void __thiscall CHPMumsCtrl::ResolveVariables(char *)" (?ResolveVariables@CHPMumsCtrl@@QAEXPAD@Z) HPMumsCtl.obj : error LNK2019: unresolved external symbol "public: void __thiscall CvsAwk::SetL(char const *)" (?SetL@CvsAwk@@QAEXPBD@Z) referenced in function "public: void __thiscall CHPMumsCtrl::ResolveVariables(char *)" (?ResolveVariables@CHPMumsCtrl@@QAEXPAD@Z) .\Debug/NewMumsEngine.exe : fatal error LNK1120: 3 unresolved externals Although it doesn't show anything while compiling. I have an instance of Cparser type Compute(Cparse Compute;) in my main class(CHPMumsCtrl). This Cparser class has a CvsAwk m_CtrlAwk; declared in its class definition,and also has a #include "vsawk.h" I am not sure of what this CvsAwk is or does(have a faint idea).Can you please tell me what to do to remove these build errors.As all of them have the same problem,I guess they all have one common error. Thanks, Arjun. Arjun Mukherjee Software Engineer Hewlett Packard Re: error LNK2019: unresolved external symbol "public: __thiscall rrrado19-Jan-05 0:56 rrrado 19-Jan-05 0:56  you're missing vsawk.cpp in list of source files in your project, or you're missing some library where cvsawk is implemented (or this library is not specified in list of libraries to be included while linking) rrrado Scroll messages from IE Filomela18-Jan-05 23:32 Filomela 18-Jan-05 23:32  I want do to a programm which registers all the scrolls of vertical scroll bar from IE.The problem is I cannot catch any scroll message.Thanks. Re: Scroll messages from IE rrrado19-Jan-05 0:29 rrrado 19-Jan-05 0:29  Did you try the IHTMLWindow2 -> put_onscroll event handler ? rrrado Using Performance Graph... utkumanyaksalak18-Jan-05 23:27 utkumanyaksalak 18-Jan-05 23:27  How can i learn using PerformanceGraph ...it is very important... if you know any document or article!! Wave Format Transforming Question IsaacLitingjun18-Jan-05 22:56 IsaacLitingjun 18-Jan-05 22:56  Hi,Everyone: I got following questions: 1> i want to transform a wave's format to standard format i needed(such as 8000HZ,16 bit,mono,signed) we can use software Goldwave’s “Effects->Resample”. But are there any classes or functions in VC? 2> we aslo want to transform the standard wave (we get from the first step) to A-Law PCM Signals. How can I realize that in VC? Can any of you give me some threads or links? Thank you very much! - - - - - - - - - - - - - - - - - - - - - - - - Many nights we've prayed with no proof anyone could hear, we were moving moutains long before we knew we could! Yet now i'm standing here, although we know there's much to fear, hope seemed like summer bird too swiftly flown away ... There can be miracles! When you believe, though hope is frail, it's hard to kill! Who knows what miracles, you can achieve! When you believe, somehow you will ... YOU WILL WHEN YOU BELIEVE double buffering on a mfc dialog with CTreeCtrl as content neosun18-Jan-05 22:42 neosun 18-Jan-05 22:42  Hi all, I've a MFC dialog with a button and a CTreeCtrl at the dialog. My dialog is resizable and when resizing the dialog I observe flickering. First: In the OnPaint() method, I've made a second DC (Device Context) on the memory and disable the WM_ERASEBKGND message. Second: I fill the DC with the background colour and then I use the BitBlt() method to switch to the memory device context. Could anyone suggest me how I can make copy of the CTreeCtrl in the memory device context. Jens Re: double buffering on a mfc dialog with CTreeCtrl as content Martin Koorts19-Jan-05 6:30 Martin Koorts 19-Jan-05 6:30  Hi (what you're doing sounds a bit elaborate) If you're only concerned with the flicker, you can set the dialog's style to include WS_CLIPCHILDREN - this way, the dialog and the control don't compete at drawing the same area. Try it and see if this solves your problem. You can set this property in the Resource Editor too. HTH Martin Re: double buffering on a mfc dialog with CTreeCtrl as content Shog919-Jan-05 8:51 Shog9 19-Jan-05 8:51  Tree controls are a bit tricky to double-buffer, as they occasionally draw outside of WM_PAINT. In controlled situations though, it should be possible. Look into WM_PRINT for a way to force the tree to draw to a specific DC. Shog9 I'm not the Jack of Diamonds... I'm not the six of spades. I don't know what you thought; I'm not your astronaut... Forwared Calls Maxime Labelle18-Jan-05 22:41 Maxime Labelle 18-Jan-05 22:41  Hi, How can one implement calls forwarded to another DLL. For instance, how is it possible to create a DLL that exports symbols forwared to another DLL. For instance, kernel32.dll exports RtlZeroMemory via a fowarded call to ntdll.dll. Can I make my own DLL export symbols via forwarded calls to other DLL ? Cheers. -- Maxime Labelle maxime.labelle@freesurf.fr odbc, dao, oledb, ado database question ! Anonymous18-Jan-05 22:28 Anonymous 18-Jan-05 22:28  Hello, I would like to have 4 examples about odbc, dao, oledb, ado database. Who can give me those examples or links ? Thanks in advance. Re: odbc, dao, oledb, ado database question ! IsaacLitingjun18-Jan-05 22:55 IsaacLitingjun 18-Jan-05 22:55  This is quite a good article! Enjoy it. http://www.codeproject.com/database/caaadoclass1.asp[^] - - - - - - - - - - - - - - - - - - - - - - - - Many nights we've prayed with no proof anyone could hear, we were moving moutains long before we knew we could! Yet now i'm standing here, although we know there's much to fear, hope seemed like summer bird too swiftly flown away ... There can be miracles! When you believe, though hope is frail, it's hard to kill! Who knows what miracles, you can achieve! When you believe, somehow you will ... YOU WILL WHEN YOU BELIEVE Re: odbc, dao, oledb, ado database question ! Anonymous19-Jan-05 0:07 Anonymous 19-Jan-05 0:07  Is there any example more ? Thank you. Re: odbc, dao, oledb, ado database question ! IsaacLitingjun19-Jan-05 0:17 IsaacLitingjun 19-Jan-05 0:17  These links had helped me a lot, hope also can help you. and the first link i have given you has a very clear introduction and good examples. http://www.codeproject.com/database/caaadoxclass.asp[^] http://www.codeproject.com/database/msdatagrid.asp[^] http://www.codeproject.com/database/msdatagridoledb.asp[^] Best Wishes. - - - - - - - - - - - - - - - - - - - - - - - - Many nights we've prayed with no proof anyone could hear, we were moving moutains long before we knew we could! Yet now i'm standing here, although we know there's much to fear, hope seemed like summer bird too swiftly flown away ... There can be miracles! When you believe, though hope is frail, it's hard to kill! Who knows what miracles, you can achieve! When you believe, somehow you will ... YOU WILL WHEN YOU BELIEVE Re: odbc, dao, oledb, ado database question ! Anonymous19-Jan-05 0:32 Anonymous 19-Jan-05 0:32  Thank you very much. Re: odbc, dao, oledb, ado database question ! Anonymous19-Jan-05 0:38 Anonymous 19-Jan-05 0:38  Can you give me Visual C links ? Thank you. Re: odbc, dao, oledb, ado database question ! Selvam R19-Jan-05 2:50 Selvam R 19-Jan-05 2:50  >>Can you give me Visual C links ? Hi, Do you need list of links?? http://msdn.microsoft.com/visualc/[^] http://www.cetus-links.org/oo_visual_c_plus_plus.html[^] Regards, Selvam Re: odbc, dao, oledb, ado database question ! Anonymous19-Jan-05 3:17 Anonymous 19-Jan-05 3:17  Thank you very much ;);P checking for stack or heap allocation Garth Watkins18-Jan-05 22:24 Garth Watkins 18-Jan-05 22:24  Hi I need to ensure that an object of a one of my classes only gets created on the stack as opposed to on the heap using 'new'. Is there a compiler keyword (I'm using VC .net) or some other method to ensure this. Thanks Garf Re: checking for stack or heap allocation jan larsen18-Jan-05 23:27 jan larsen 18-Jan-05 23:27  I'm not a guru, so take this as a SWAG: Maybe you could override operator new for your class, and let it throw an exception if invoked? Or did you mean that operator new should allocate the object on the stack instead of the heap?, in that case, I would say: Not recommendable. (And probably very hard to implement). "After all it's just text at the end of the day. - Colin Davies "For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus Re: checking for stack or heap allocation Garth Watkins19-Jan-05 0:39 Garth Watkins 19-Jan-05 0:39  Thanks Jan I should have mentioned that I was actually looking for a compile time solution. Serqe's solution seems to be what I was looking for. Garth Re: checking for stack or heap allocation Serge Krynine18-Jan-05 23:37 Serge Krynine 18-Jan-05 23:37  you need to declare the operator new as either a private or protected; for example: class A { private: void* operator new(size_t); }; int _tmain(int argc, _TCHAR* argv[]) { //error C2248: 'A::operator new' : cannot access private member declared in class 'A' A* pA = new A; // OK A a; return 0; } Re: checking for stack or heap allocation Garth Watkins18-Jan-05 23:49 Garth Watkins 18-Jan-05 23:49  Thanks Serge This is exactly what I was looking for. Garth

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