Windows GUI Programming with C/C++ ( Win32 API ) | Part -9 | Save File Dialog and Scrollbars

[@timothywrona6381]

You have a memory leak when you call "new[]" without a corresponding "delete[]" (note that this is "delete[]" with square brackets, not just "delete"). I would suggest taking a more modern C++ approach to reading the file that eliminates the issue of manual memory management altogether: Include these headers: #include #include Then do this: std::wifstream file(path); std::wstring contents((std::istreambuf_iterator(file)), std::istreambuf_iterator()); SetWindowText(hEdit, contents.c_str()); This solves your memory leak and leaves the task of memory management to the C++ standard library. Overall great tutorial videos though!

[@grekzorna8750]

@Inmasj0ns This is not object oriented though...

[@DavePaddy]

This was VERY useful tutorial series. I wish you did more of these, you're explaining very well.

[@ajupeter1125]

Tributes! to a great teacher you are!.... Thank you so much for explaining things so beautifully.. Pray you do well in everything you do.

[@kimlynhep1462]

Where is part 10?

[@billtsou8071]

I really like your tutorial. Your English is easy to understand. What you've taught us are extremely helpful for beginners. Hope that you can publish part 10 of GUI tutorial. Thanks!!

[@hk-aerialvtol4371]

Thanks for the 9 video into to Win32. This was extremely well thought out and presented.

[@santiagomendezmejia7155]

Thanks !!!! For me this is the best tutorial of Win32 API. Greetings from Colombia

[@aibou2399]

Thanks for this video series, i was afraid of diving in this old school c style api, but it was a confortable trip with your tutorials.

[@Martin-wz5rm]

Can you please do a tutorial on checkboxes?

[@brendananderson9102]

Yeah, I wanted to program a GUI with bullet points. I guess I'll have to find a tutorial elsewhere.

[@Lugmillord]

Thank you for this tutorial series. This really helped me getting started with the Windows API!

[@timobeyer9870]

We want Part 10♥

[@benmac6862]

Why do you sometimes use the underscore _ before a variable ?

[@PerchEagle]

Hi .. I have a question, do you have a blog page or email so I send you my problem ? I'm trying to print multiple page on the same hWnd object.

[@noteng0]

Excellent list bro, was so helpfull to me and my projects :)

[@carloseduardomayerdeolivei2913]

Congratulations! Thank you for the great information that you have provide us!

[@alvinhi5467]

Nice, did you have example for create trackbar in windows GUI C++

[@peterSobieraj]

So there will be challenge in next video, and it was last video in series. :D

[@emanoel.g.s]

I have a problem, can you help me? I need to read a file, execute a series of procedures (which take time), and during the procedure I want to show text messages (debug) on ​​the "hEdit" screen. However, it is only after the process is finished that writing is done on the "hEdit" screen. Is there any way for the two processes to coexist?

[@starwinner4982]

Take a look at multithreading. Use one thread for the main loop of the window, where you handle all the events, and another thread for reading the file. In order to get updates on how much of the file has been read, then read the file byte by byte - after each byte notify the other thread about the progress. If you ask how to share this progress? Then just store the pointer of the first object, where the function that is multithreaded, is running. Then just update some array with that pointer. Hope this helped! :)

[@ahmedessamahmed860]

How to add sound in the program? please say, thank you

[@brazo98]

Thx a lot about your perfect tutorials. So, one question, how can read from a windows a panel objects? For example a label or textedit field? Is this possible with the findwindowex function? Or via getwindowstext? It make me really creepy that problem! Thx a lot for a answere. Please keep healthy! 🖖🏻🖖🏻🖖🏻

[@MasterMindmars]

Thank you so much. Could you make a video for draw circles, lines, rectangles. ..? Greetings.

[@mikeroland9963]

Very useful tutorial, thank you, brother !

[@EliasNPC]

Could you do these tutorials while using ResEdit for styling?

[@W3Bches3]

Next part(10):

[@mariodvillarreal]

I want to retrieve data from another application. With window spy, i can get all structure of forms, including theirs Id. But, can't retrieve data. Anyone can help me?

[@cato_ix]

Hey! How do you remove the terminal? This has helped me figure out a couple things, but I don't want to have the extra program open in the background.

[@aibou2399]

If you are compiling from command line, use the "-mwindows" flag.

[@MohamedGaber-sv6nh]

شكرا لك يا صديقي😀🙂 لقد ساعدتني في الكثير🙂

[@andreimiga8101]

I have a question. How do you change the font of the controls? The default font looks bad.

[@animalvids6312]

everything in windows is done by sending messages. enjoy docs.microsoft.com/en-us/windows/desktop/controls/edit-controls-text-operations

[@srinivasreddy4306]

10 bro plz

[@code-to-learn]

More part please! About media player

[@toadvices1502]

Hello, can i have the source code of this project? regards

[@newgatefullbustar8366]

thanks so much for these wonderful series.

[@nastyavicodin6229]

I don't understand why but when I open file in usual text editor after every line it's additional empty line. Help me pls with this problem. Code was the same as in video

[@ThePentamollisProject]

try this char* data[length + 1]; GetWindowText (hInputField, data, length); data[length] = '\0'; fwrite(data, length, 1, file); i didn't pay much attention to the file I/O code so there might be problems with that.

[@nastyavicodin6229]

In notepad all files are ok When I open it in Sublime text my files became smth like this: 2369 6e63 6c75 6465 0d0d 0a0d 0d0a 6865 6c6c 6f5f 776f 726c 640d 0d0a 7772 6974 6528 2900 But this happend only if I edit empty files.

[@nastyavicodin6229]

This is my first version of write_file func: void write_file(char *path) { FILE *file; file = fopen(path, "w"); int _size = GetWindowTextLength(hFile_cont); char *data = new char[_size + 1]; GetWindowText(hFile_cont, data, _size + 1); fwrite(data, _size + 1, 1, file); fclose(file); }

[@nastyavicodin6229]

This is second version: void write_file(char *path) { FILE *file; file = fopen(path, "w"); int _size = GetWindowTextLength(hFile_cont); char *data = new char[_size + 1]; GetWindowText(hFile_cont, data, _size); data[_size] = '\0'; fwrite(data, _size, 1, file); fclose(file); }

[@nastyavicodin6229]

When I changed my write_file func nothing changed in output, still empty lines and NULL in the EOF

[@MisterTyken]

Awesome work, I've found something that might prove to be difficult for the viewers that I've run into. If you don't load a file then it crashes because it doesn't have a file to load and goes onto the next function as if it did. A little help on this fix would be helpful

[@FrostGamingHype]

i Still Want A Short Way For This Is Too Many Void Function Going IN My Mind Bro There Should Be An Smaller And Shorter Way To Do IT You Know

[@mikejzx]

Great tutorial, but I believe you forgot to insert the terminating character '\0' into the data before writing, because I noticed when I opened the saved file in Programmer's Notepad there was a character at the end which said "NUL". But I think that was because of the data size being 1 int too large. Here's what I did to prevent this: char* data[length + 1]; GetWindowText (hInputField, data, length); data[length] = '\0'; fwrite(data, length, 1, file); Let me know of any errors I made. I think the ' + 1' isn't actually required for this.

[@ThePentamollisProject]

Yes you're right, and sorry for this silly mistake. I was just focusing on the stuff that was related to the API and i didn't pay much attention to the input/output code.

[@mikejzx]

No worries mate, we all make mistakes ;)

[@Lugmillord]

I tried your code and when opening the file, the last character was replaced by a space. This worked fine for me: char* data = new char[sizeOfContent + 1]; data[sizeOfContent] = '\0'; GetWindowText(hFileOutput, data, sizeOfContent + 1); fwrite(data, sizeOfContent, 1, file);

[@mikejzx]

+Lugmillord Interesting... In your code, I don't think the '\0' is even being written to the file, because your specified length in fwrite doesn't have the + 1. And also you called GetWindowText after assigning the last char of data to '\0', so it would probably be replaced anyway.

[@Lugmillord]

I thought so, too. But when I switched the lines, the last character was replaced and I found an extra space in the text file. Maybe allocate length + 2?

[@rajjoshi6300]

Hey, is there a way that we can see your complete source code from all the files? I want to see it in one place so I can understand it better. I need to do this for my marking period project. Your videos are great and keep working hard!

[@ThePentamollisProject]

I dont have separate sources of all the tutorials as i edit the same project everytime. Although I do have the source of Part 9. And i think i might be able to dig up the source of part 6 or 7. I can email it all to you you if you provide your id, or alternatively, you can text me at the facebook page of this channel ( facebook.com/pentamollis ), and i'll send the code there. :-)

[@rajjoshi6300]

I will message you on your facebook page

[@GtTrader67]

post the complete code file.

[@doelekkerrechts3782]

I notice how you use "new" to allocate an array without deleting it afterwards. Are you more familiar with Java? Nevertheless, it's a helpful tutorial. Thanks.

[@timothywrona6381]

He actually uses "new[]" which is not quite the same as "new". In order to avoid a memory leak the "delete[]" operator with square brackets must be called. These kinds of subtle details make it very easy for mistakes to happen so it would really be better to just use a "std::ifstream" to read the file and leave the task of memory management to the standard library.

[@hungtrinh7169]

thank you , i am Vietnamese ,HoangSa TruongSa by VIETNAM

Nice

[@royy7954]

Good!

[@Versie2007]

More, plz :)

[@EarthSettler]

thank you again

[@W3Bches3]

Hello :)