C / C++ / MFC

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odbc in Run Time? murali_utr11-Oct-03 2:27 murali_utr 11-Oct-03 2:27  hi, my application back end is mysql. i using crystal report for report. i connect database thru ODBC. how to create ODBC at run time. any one help to me. Thanks in Advance. Unique generated id to be shared between machines frankse11-Oct-03 0:24 frankse 11-Oct-03 0:24  I am working at a company that has an established database and code. Lately they have been splitting their transactions between 2 databases running on differnt machines and then importing the transactions on one machine over to the other. The problem created by this is that their transaction ID are randomly generated long fields. The way the code use to keep ids unique was to do a select on the database to see if new randomly generated id already exists on the database and to keep on trying till a new unique number was generated( ). Now that the code is run on two machines, two separate databases this aproach is obviously not working anymore. I could set an inifile setting sothat one machine generates only even and the other only uneven numbers but this is prone to all sort of stuff-upps Any suggestions? Re: Unique generated id to be shared between machines John M. Drescher11-Oct-03 0:58 John M. Drescher 11-Oct-03 0:58  Are you using MSSQL (TSQL) ? You can create a GUID which will be unique between machines using the NEWID() function and uniqueidentifier data type. See the following for documentation http://msdn.microsoft.com/library/default.asp?url=/library/en-us/tsqlref/ts_na-nop_4pt0.asp[^] Using uniqueidentifier Data The uniqueidentifier data type stores 16-byte binary values that operate as globally unique identifiers (GUIDs). A GUID is a unique binary number; no other computer in the world will generate a duplicate of that GUID value. The main use for a GUID is for assigning an identifier that must be unique in a network that has many computers at many sites. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/acdata/ac_8_con_03_2uox.asp[^] John Re: Unique generated id to be shared between machines frankse11-Oct-03 4:04 frankse 11-Oct-03 4:04  We are running db2 version 7. I did consider using a GUID, the problem is the transaction_id is an integer on the database and they will never ever allow me to change any datatypes on our database. Thanks for the suggestion though;) Re: Unique generated id to be shared between machines John M. Drescher11-Oct-03 4:37 John M. Drescher 11-Oct-03 4:37  frankse wrote: they will never ever allow me to change any datatypes on our database. If that is true than the best way is to use some of the bits to represent which server it is on. Odd even will work but you may want to reserve more bits to allow more servers. John Re: Unique generated id to be shared between machines frankse12-Oct-03 21:02 frankse 12-Oct-03 21:02  Great Idea, thanks I knew there was a cleaner solution, just could not grab a hold of it. How to get local ip address in C? legrillon10-Oct-03 23:48 legrillon 10-Oct-03 23:48  Hi Just wondering how I can simply get the current Ip address in a C program on my NT box ? (In fact, I'd like to get same information that what's retrieved by the ipconfig exe). My constraint is pure C. Thanks! Legrillon Re: How to get local ip address in C? Beer2611-Oct-03 7:11 Beer26 11-Oct-03 7:11  You'll have to find a C library for sockets. try sourceforge or something. Re: How to get local ip address in C? ZoogieZork11-Oct-03 9:37 ZoogieZork 11-Oct-03 9:37  Straight from Google: http://tangentsoft.net/wskfaq/examples/ipaddr.html[^] The only C++'isms in the above example are the use of single-line comments and iostreams, both of which are easy to port to C. - Mike Re: How to get local ip address in C? legrillon13-Oct-03 18:38 legrillon 13-Oct-03 18:38  Thanks Mike. It was easy to port this example to C. It works fine. Setting Font for Menu Items ramya8310-Oct-03 20:12 ramya83 10-Oct-03 20:12  hi all, can anyone please tell me how to set font for menu items??? Can I set my own font for menu items?? Kindly help me. thanks!! ramya. Re: Setting Font for Menu Items Anonymous11-Oct-03 5:07 Anonymous 11-Oct-03 5:07  I don't recommend changing the font on menu items (Users pick these fonts through the appearance manager and you have no right to be going around changing them). That said, if you are desperate (idiot managers pushing you to do so) you can create an owner drawn menu, and implement the DrawItem function to select and use whatever font you like. You'll have to implement MeasureItem as well to decide the height of menu items. There are about 7 billion custom menu implementations out there. Grab one and get to work. Re: Setting Font for Menu Items Beer2611-Oct-03 7:02 Beer26 11-Oct-03 7:02  Anonymous wrote: (Users pick these fonts through the appearance manager and you have no right to be going around changing them). Funniest thing I've read all week. I guess Microsoft better go ripping the chapters for owner draw menus out of their MFC and Windows programming books right about now then! I hope you were joking! Re: Setting Font for Menu Items Blake Coverett11-Oct-03 10:09 Blake Coverett 11-Oct-03 10:09  He (or she) wasn't joking. Ownerdraw menus are for the purpose of adding graphical bits to menu's who's purpose is to select something visual. They are not to encourage programmers to choose what _they_ think is a cool new menu font. The fact that you _can_ do something doesn't mean you should. -- -Blake (com/bcdev/blake) Re: Setting Font for Menu Items Beer2611-Oct-03 10:28 Beer26 11-Oct-03 10:28  I think that a big asset to windows and MFC is the fact that you don't have to follow standardized ui and font schemes. Good thing we don't program for a framework that forces you to conform, what a boring world it would be. Just look at KDevelop linux programming with GTK, that's a whole new level of boring conformity, unless you make your own custom widgets and menus from scratch. You can't even C++ style subclass GTK widgets at all. You can only psuedo subclass them with C Re: Setting Font for Menu Items Blake Coverett11-Oct-03 10:38 Blake Coverett 11-Oct-03 10:38  A consistent user interface is a good thing. Those who can not remember the past are condemned to repeat it. -- -Blake (com/bcdev/blake) Re: Setting Font for Menu Items Ian Darling12-Oct-03 3:41 Ian Darling 12-Oct-03 3:41  I agree with Blake. Software that fails to conform with my expectations gets junked. It's a little rule known as "The Path of Least Astonishment". You never do anything in an application that the user does not expect, and this includes changing the user interface unnecessarily. What happens if you use some sort of "cool" font not installed on my system? (And BTW, I don't want "cool" fonts installed on mine) What happens if I have specific disability settings, and your code doen't manage them properly - would you doom a blind or partially sighted person to not being able to use your application, because you decided that your groovy interface was more important than having an application that everyone can use. Don't be so bloody arrogant. You might find it boring, but then again, I want applications that I can just get on and use, not have a million and one applications with their own conflicting ideas on what my user experience should be. Who is more important - your users, or your ego? The framework doesn't force you to conform because there are occasions you need to break it. Looking groovy isn't one of those occasions! One reason for using a framework is to reduce development times. Why then increase it by pissing about owner drawing your menus? -- Ian Darling "The moral of the story is that with a contrived example, you can prove anything." - Joel Spolsky Re: Setting Font for Menu Items Beer2612-Oct-03 4:24 Beer26 12-Oct-03 4:24  you can just bitmap the menu items and draw that instead, then they don't have to have the font installed. As for blind people, well, I guess they can't use it, but there are already so many applications they can use that I doubt it would make a big difference with a few owner draw apps out there. Maybe microsoft should consider making DirectX 3D Visually impaired compatible too if we're going to go down the road you describe. Re: Setting Font for Menu Items Ian Darling12-Oct-03 4:57 Ian Darling 12-Oct-03 4:57  Beer26 wrote: you can just bitmap the menu items and draw that instead, then they don't have to have the font installed. So people who use large fonts? Maybe you could StretchBlit your menu items to the larger size so they look inconsistent and crap! Beer26 wrote: As for blind people, well, I guess they can't use it, but there are already so many applications they can use that I doubt it would make a big difference with a few owner draw apps out there. So your application is probably being done better elsewhere, because I would suggest that people considering disabilities probably develop more usable software anyway. Beer26 wrote: Maybe microsoft should consider making DirectX 3D Visually impaired compatible too if we're going to go down the road you describe. You fail to appreciate the difference between an application that is primarily visual (ie, a lot of games), and an application that does not need to be visual at all (just about everything else). There are also people who have written games designed to be played as an aural rather than visual experience. Like this guy, in fact: http://student-kmt.hku.nl/~audiogam/ag/articles/chrislewisinterview01.htm[^] -- Ian Darling "The moral of the story is that with a contrived example, you can prove anything." - Joel Spolsky Re: Setting Font for Menu Items Beer2612-Oct-03 5:09 Beer26 12-Oct-03 5:09  Ian Darling wrote: Maybe you could StretchBlit your menu items I didn't mention anything about StretchBliting, If the draw rect is bigger, you draw the real size and center it, and screw their large font settings. I'm personally sick of the windows standard ui, and if it didn't take so much longer to do owner draw I would do it alot more. As a matter of fact I will be doing it alot more even though it takes a little extra effort. Re: Setting Font for Menu Items Ian Darling12-Oct-03 5:22 Ian Darling 12-Oct-03 5:22  Beer26 wrote: screw their large font settings And that sums up entirely what is wrong with your attitude towards application development. Maybe you should go read some books on user interfaces, like GUI Bloopers or The Inmates Are Running The Asylum. Then you'll (hopefully) appreciate what an asinine, and quite frankly, appalling, attitude towards users you have there. -- Ian Darling "The moral of the story is that with a contrived example, you can prove anything." - Joel Spolsky Re: Setting Font for Menu Items ramya8312-Oct-03 20:30 ramya83 12-Oct-03 20:30  hi all, If it's going to be difficult to set font for the menu items.........i would like to switch to a Popup ListBox containing list of items that i want to display....in that case how do i popup a ListBox on right click??? Currently im using an AutoRichEditCtrl where i would like to popup a ListBox containing set of items..... Can anyone please help me... thanks! ramya. Re: Setting Font for Menu Items ramya8312-Oct-03 18:04 ramya83 12-Oct-03 18:04  Hi, Thanks for ur responses.......as the GUI is for different set of users who might not know english and hence the menu items should be in their own language...that is why i got to set new font for menu items.... ramya. Re: Setting Font for Menu Items {EDITED} Ian Darling12-Oct-03 22:08 Ian Darling 12-Oct-03 22:08  Well, start here for some info that might be useful regarding character sets: http://www.joelonsoftware.com/articles/Unicode.html[^] In fact, IIRC JoS has a few articles that deal with developing for multiple langauges. As long as you write your software with internationalization in mind (sometimes referred to as "i10n" or "i18n" - try googling those terms), you shouldn't need to worry about the specific fonts - as users in different languages will have the appropriate (unicode) font set themselves anyway! I don't know of any developer that internationalizes their software in a manner that requires a new font being used instead of the systems default fonts. HTH. [EDIT] Just a thought - this still applies, even when the base operating system is set as English - at least on 2000/XP, as I seem to recall it's poosible to have multiple language bases installed. [/EDIT] -- Ian Darling "The moral of the story is that with a contrived example, you can prove anything." - Joel Spolsky Re: Setting Font for Menu Items {EDITED} Mike Dimmick13-Oct-03 1:27 Mike Dimmick 13-Oct-03 1:27  Ian Darling wrote: sometimes referred to as "i10n" or "i18n" Internationalisation is always 'i18n' - there are 18 characters between the leading i and the trailing n. Internationalisation normally refers to the process of stripping out any language- or culture-dependent behaviour from the application, using the user's preferred language and culture. l10n (not i10n) is Localisation (again, 10 characters between l and n), the process of taking an internationalised application and creating the appropriate resources to adapt it for a particular culture. I seem to recall it's poosible to have multiple language bases installed. What, you mean the Multilingual User Interface[^]? Microsoft's Global Development Portal[^] is a good start for anyone needing to write an international application.

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