C / C++ / MFC

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Re: Can somebody help me? Karavaev Denis28-Nov-01 1:04 Karavaev Denis 28-Nov-01 1:04  Than you very much for your underasanding but ... one more: : error C2664: 'void __thiscall CWnd::GetDlgItem(int,struct HWND__ ** ) const' : cannot convert parameter 1 from 'struct HWND__ *' to 'int' this error I get with your code? Is I did wrong something again? ============== www.design.kg Re: Can somebody help me? Christian Graus28-Nov-01 1:48 Christian Graus 28-Nov-01 1:48  For some reason it knows to call ::GetDlgItem for me, but for you it's trying the CWnd:: function of the same name. Preface the function with :: and you'll be fine. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now Is it safe to handle window messages in a MFC window class derived class? Nish Nishant27-Nov-01 19:10 Nish Nishant 27-Nov-01 19:10  Hello, I have a class derived from CFrameWnd. Is it okay for me to do this from within my class? while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); if (msg.message==WM_CLOSE) break; } What I want to know is, will this interfere with MFC's message handling? Nish Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic Re: Is it safe to handle window messages in a MFC window class derived class? Oliver Anhuth28-Nov-01 0:38 Oliver Anhuth 28-Nov-01 0:38  In principle it should not interfere with MFC's message handling. But your message loop does not conform to the MFC standard. You would loose PreTranslateMessage and idle time processing (which updates menus and toolbars). Some MFC classes might stop working properly. The msdn contains some articles how to write an MFC conformant message loop: Idle Loop Processing. Another (maybe better) method is described in knowledge base article Q99999. regards Oliver Re: Is it safe to handle window messages in a MFC window class derived class? Nish Nishant28-Nov-01 4:50 Nish Nishant 28-Nov-01 4:50  Thanks Oliver. I was expecting more responses though. Your reply was the single solace Nish Sonork ID 100.9786 voidmain www.busterboy.org If you don't find me on CP, I'll be at Bob's HungOut How to handle Scroll Bar Poblems binnu27-Nov-01 18:39 binnu 27-Nov-01 18:39  Dear friends Will you please help me how to display contents by maintaining scrollbar movement.I think i have to display line by line an WM_PAINT but it didn't work and access violation error comes. Actually i am displaying the contents of clipboard so it should be of varying length and i am accessing it line by line from clipboard. so please give me solution to do it in a right way.If possible please send me some code example. i shall be ever great ful to you for this. Thanking you in advance. Binnu How to handle Scroll Bar Poblems binnu27-Nov-01 18:39 binnu 27-Nov-01 18:39  Dear friends Will you please help me how to display contents by maintaining scrollbar movement.I think i have to display line by line an WM_PAINT but it didn't work and access violation error comes. Actually i am displaying the contents of clipboard so it should be of varying length and i am accessing it line by line from clipboard. so please give me solution to do it in a right way.If possible please send me some code example. i shall be ever great ful to you for this. Thanking you in advance. Binnu ToolTips with variables Steve L.27-Nov-01 15:59 Steve L. 27-Nov-01 15:59  how do you make it so a string or some variable that changes whithin the program will be dislayed in a tooltip box? -Raffi Re: ToolTips with variables Eugene Pustovoyt27-Nov-01 19:40 Eugene Pustovoyt 27-Nov-01 19:40  Do you want tooltip to the controls? Eugene Pustovoyt Algorithm for Key Generator Sam C27-Nov-01 13:00 Sam C 27-Nov-01 13:00  Hi, Does anyone here have a favorite algorithm and/or method for generating serial numbers for users on applications you have written? If so, I would be very appreciative if you would share them I am on the verge of writing my first shareware application and would like to implement this feature. Also if you have any other ways or methods I would greatly appreciate hearing them...(i.e. links to articles on web pages, links to algorithms or methods, etc...) I am not looking for something CRACK proof but something just to make it look a little more professional, and have casual users register. TIA for any answers. Sam C ---- Systems Manager Hospitality Marketing Associates Desktop patterns and wallpapers retrieval Benoit Legris27-Nov-01 11:01 Benoit Legris 27-Nov-01 11:01  How can I retrieve the desktop patterns and wallpaper displayed in the control\display pane? Re: Desktop patterns and wallpapers retrieval Christian Graus27-Nov-01 16:50 Christian Graus 27-Nov-01 16:50  There is a DrawDesktop api call ( that might not be the name, but it's something *like* that ). Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now Re: Desktop patterns and wallpapers retrieval Nish Nishant27-Nov-01 18:06 Nish Nishant 27-Nov-01 18:06  This registry key has a list of all the patterns HKEY_CURRENT_USER\Control Panel\Patterns I cant figure out where it saves the current pattern Nish Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic FOUND :-) Re: Desktop patterns and wallpapers retrieval Nish Nishant27-Nov-01 18:40 Nish Nishant 27-Nov-01 18:40  Nish [BusterBoy] wrote: This registry key has a list of all the patterns HKEY_CURRENT_USER\Control Panel\Patterns I cant figure out where it saves the current pattern Open this key HKEY_CURRENT_USER\Control Panel\Desktop and take a look at the value "Pattern" Now compare the value of "Pattern" with all the patterns to find out which of the named patterns is the current pattern If there is no current patter "Pattern" will return a null string Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic wallpapers retrieval Nish Nishant27-Nov-01 18:54 Nish Nishant 27-Nov-01 18:54  For getting wallpaper info do this - Open this key :- HKEY_CURRENT_USER\Control Panel\Desktop Query the following values :- TileWallpaper [can be 1 or 0] Wallpaper [the fullpath filename of the wallpaper] WallpaperStyle [can be 0-for center and 2-for stretch] -- [I dont know what 1 stands for ] Nish Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic CTreeCtrl question Vu Nguyen27-Nov-01 10:37 Vu Nguyen 27-Nov-01 10:37  Hi all! I have a tree in a dialog. The dialog has other controls on it also. When I select a branch in my tree, the branch changes color (it's highlighted). If click on different control, say a button outside the tree, then the branch change color back to before it was selected(it's not highlighted any more). How do I keep its highlighted color when the tree looses focus? Thank You Vu vucsuf Re: CTreeCtrl question Brad Bruce27-Nov-01 11:51 Brad Bruce 27-Nov-01 11:51  Make sure you check "Show Selection Always" in the resource editor. Re: CTreeCtrl question Nish Nishant27-Nov-01 18:00 Nish Nishant 27-Nov-01 18:00  use the TVS_SHOWSELALWAYS style Nish Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic Reading Binary Files - file ptrs john john mackey27-Nov-01 9:44 john john mackey 27-Nov-01 9:44  Help! I'm having problems understanding. I am reading a binary file using a structure to hold the data: MY_STRUCT myStruct fread(&myStruct,sizeof(MY_STRUCT),1,inFp) When I examine the elements of myStruct, it looks like data is stored correctly in the structure's data elements. HOWEVER, when I try to read the file again, the file pointer inFp is not at the end of the just read structure -- it doesn't advance to the end of the just read block of binary data, but instead looks to be positioned half-way between the start and end of the block. Any help? I just want to read binary data one logical block at a time. Thanks. Johnny Re: Reading Binary Files - file ptrs Chris Losinger27-Nov-01 9:58 Chris Losinger 27-Nov-01 9:58  fread should act just as you assume - it reads and sets the fp to the place it stopped reading. check the return from fread, or call feof, to make sure you're not out past the end of the file... -c Smaller Animals Software, Inc. Re: Reading Binary Files - file ptrs john john mackey27-Nov-01 10:01 john john mackey 27-Nov-01 10:01  That's what I thought and hence my (utter) bewilderment %-) thanks, I'll keep trying. Re: Reading Binary Files - file ptrs Derek Waters27-Nov-01 11:15 Derek Waters 27-Nov-01 11:15  Just a thought, as this is a problem I have encountered myself. In the debugger, try seeing what sizeof(MY_STRUCT) is and compare it to what you're expecting. I've found that the program that generates the structured files can be using a pragma pack (see MSDN for details) might result in a different value of sizeof(MY_STRUCT) than another program that is not using it. I believe that VC++ tries to align structures to 4-byte boundaries (not sure - I'd have to check MSDN) so if it is not packed, the sizeof call could return a value larger than expected. Hope this helps. ------------------------ Derek Waters derek@lj-oz.com Re: Reading Binary Files - file ptrs Todd Smith27-Nov-01 12:30 Todd Smith 27-Nov-01 12:30  To fix the byte alignment problem you can change the packing for your structure so the extra bytes are not added. #pragma pack(push, 1) typedef struct { blah } MY_STRUCT; #pragma pack(pop) Todd Smith Re: Reading Binary Files - file ptrs john john mackey28-Nov-01 12:25 john john mackey 28-Nov-01 12:25  Thanks. I am using a #pragma pack as follows: #pragma pack (push, enterImportExport) #pragma pack (2) // 1,2,4,8,16 // Restore enterImportExport settings at end of this header file. typedef struct { blah, blah, } MY_STRUCT; ... typedef struct { blah, } ANOTHER_STRUCT; ... // Restore enterImportExport settings. #pragma pack (pop, enterImportExport) I don't think I have tried all the alignment values (1,2,4,8,16), but byte alignment did pose a problem when I was reading another binary file using ANOTHER_STRUCT -- this works. Thanks for the suggestions. Curious on results? Johnny ANSWER: Reading Binary Files - file ptrs john john mackey30-Nov-01 5:44 john john mackey 30-Nov-01 5:44  Ah! I found my critical mistake. Yes, the byte-alignment would be an issue and I did account for this as my binary file read is based on a similar operation I performed successfully in the same application. MY PROBLEM WAS in how I opened the file. I orginally was reading a text file and then when I changed to reading a binary file, I forgot to use the parameter in the fopen() statement: fopen (sSourceFile,"rb") instead of just fopen (sSourceFile,"r") Thanks for all those who offered help and advice. Johnny

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