C / C++ / MFC

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Re: Connection with mysql an Crecordset Shivanand Gupta25-Mar-10 20:48 Shivanand Gupta 25-Mar-10 20:48  i got proper exception in case of "Creordset::dynaset". How can call open method of Crecordset with Creordset::dynaset to fetch record from Mysql Re: Connection with mysql an Crecordset CPallini25-Mar-10 21:42 CPallini 25-Mar-10 21:42  shivanandgupta wrote: i got proper exception in case of "Creordset::dynaset". What is 'proper exception'? Why didn't you report the erreor message? 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] Data encryption Code-o-mat24-Mar-10 23:02 Code-o-mat 24-Mar-10 23:02  Hello people! If i want to encrypt some data based on a key (password) and want to keep the encryption as irreversible without the key as possible (yeah, i know, that's the point), which algorithm would you recommend? The data itself would mostly be text and only 1-2 megabytes tops, so if the choice is between safer or faster, i'd choose safer. Thanks for your oppinions. > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. < Re: Data encryption BIJU Manjeri24-Mar-10 23:26 BIJU Manjeri 24-Mar-10 23:26  For encrypting that much data (1-2 MB) you must use any symmetric algorithms like RC2, RC4, or Data Encryption Standard (DES) Re: Data encryption Code-o-mat24-Mar-10 23:49 Code-o-mat 24-Mar-10 23:49  Thank you, i will check these out. > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. < Re: Data encryption Covean25-Mar-10 22:13 Covean 25-Mar-10 22:13  Don't use DES any more! Its not safe because the key is only 56 bit long. You can "hack" it, with some good machines in under a day! Use AES (128-256 bit) (Advanced Encryption Standard) or maybe, if AES not available, 3DES instead. Greetings Covean Re: Data encryption Code-o-mat25-Mar-10 22:32 Code-o-mat 25-Mar-10 22:32  Btw are these freely usable? > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. < Re: Data encryption Covean25-Mar-10 23:05 Covean 25-Mar-10 23:05  In .NET there are some crypto provider you can use for "free" for example 3DES / TripleDES. .NET 3.5 also introduced AES. I don't know if there are also libs for C++ but I can't imagine that there aren't some in the internet (for free). If you don't find anything about AES look for Rijndael its the same algorithm. Greetings Covean Re: Data encryption Code-o-mat25-Mar-10 23:07 Code-o-mat 25-Mar-10 23:07  Thank you very much. > The problem with computers is that they do what you tell them to do and not what you want them to do. < > Sometimes you just have to hate coding to do it well. < Re: Data encryption Covean25-Mar-10 23:13 Covean 25-Mar-10 23:13  You are welcome. Greetings Covean line thinkness arun_pk24-Mar-10 22:06 arun_pk 24-Mar-10 22:06  I am using pen to plot lines in graph hpen = CreatePen(PS_SOLID, thickness, rgb); even after giving the thinkness parameter as 5 . thickness of the line still remain same as if we put zero... is there any thing i m missing to add or any code or api to increase thickness of the line pls help me to come out of this mess thanks in advance............ Re: line thinkness CPallini24-Mar-10 22:10 CPallini 24-Mar-10 22:10  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: line thinkness arun_pk24-Mar-10 22:26 arun_pk 24-Mar-10 22:26  int paint_line(HWND hwnd, HDC hdc, int x0, int y0, int x9, int y9, int thickness, COLORREF rgb) { HBRUSH hbr; HPEN hpen, hpen_sav; hpen = CreatePen(PS_SOLID, thickness, rgb); hpen_sav = (HPEN) SelectObject(hdc, hpen); hbr = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH)); MoveToEx(hdc, x0, y0, NULL); LineTo(hdc, x9, y9); DeleteObject(SelectObject(hdc, hbr)); SelectObject(hdc, hpen_sav); DeleteObject(hpen); return 0; } Re: line thinkness CPallini24-Mar-10 22:37 CPallini 24-Mar-10 22:37  Your code is fine, I called it this way: case WM_PAINT: hdc = BeginPaint(hWnd, &ps); paint_line(hWnd, hdc, 0, 0, 400, 400, 5, RGB(255,0,0)); EndPaint(hWnd, &ps); break; and got a beautiful red thick line in my window. 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: line thinkness arun_pk24-Mar-10 22:49 arun_pk 24-Mar-10 22:49  I m working on a maintanance project which is too big. the same code which i send to you is been used in my project but its not working .is there any possiblity to set some default thickness of lines throughout the graph.i scare that like that some handling has been done .. because i even tried till 50... Re: line thinkness arun_pk24-Mar-10 23:00 arun_pk 24-Mar-10 23:00  thanks pallini it worked when i gave thickness as 300 thanks a lot for spending time for me... Re: line thinkness Eugen Podsypalnikov24-Mar-10 22:41 Eugen Podsypalnikov 24-Mar-10 22:41  Have you set any mapping mode at the DC ? (did you tried with thickness = 100 ?) virtual void BeHappy() = 0; Re: line thinkness arun_pk24-Mar-10 22:44 arun_pk 24-Mar-10 22:44  sorry Eugen i am a beginer.I am not sure with Mapping Mode Re: line thinkness Eugen Podsypalnikov24-Mar-10 22:47 Eugen Podsypalnikov 24-Mar-10 22:47  Could you post your calling context of the function too ? (it is a function that does call the paint_line(..) function) virtual void BeHappy() = 0; Re: line thinkness arun_pk24-Mar-10 22:51 arun_pk 24-Mar-10 22:51  inside paint line this is the portion where i create a pen hpen = CreatePen(PS_SOLID, thickness, rgb); i have tried like giving hpen = CreatePen(PS_SOLID, 0, rgb); . . . . . . . . . . . hpen = CreatePen(PS_SOLID, 50, rgb); Re: line thinkness Eugen Podsypalnikov24-Mar-10 22:53 Eugen Podsypalnikov 24-Mar-10 22:53  OK, could you try with 300 only, please ? virtual void BeHappy() = 0; Re: line thinkness arun_pk24-Mar-10 23:01 arun_pk 24-Mar-10 23:01  thanks Eugen its working fine thanks a lot why is it so ??? Re: line thinkness Eugen Podsypalnikov24-Mar-10 23:11 Eugen Podsypalnikov 24-Mar-10 23:11  Probably a special DC Mapping Mode[^] was set in the calling context... (For example: Carlo Pallini has given his calling context - there are no modifications of the DC Mapping Mode there, so it is possible to "feel" the arguments by 2 or 5 too ) virtual void BeHappy() = 0; Re: line thinkness arun_pk24-Mar-10 23:18 arun_pk 24-Mar-10 23:18  Eugon I think i need to learn About setting Modes its my pleasure to talk with you thanks a lot it really helped me arun Re: line thinkness Eugen Podsypalnikov24-Mar-10 23:46 Eugen Podsypalnikov 24-Mar-10 23:46  You are welcome, Arun ! (please observe the function that does call paint_line(..) - maybe, there is some variable like float fZoomingFactor there, so you could call the function like paint_line(.., thickness * fZoomingFactor, ..) ) virtual void BeHappy() = 0;

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