C++Builder Developer's Journal

I'm upgrading from a 20 year old C++ builder 5 to 10.3.3. I find the main form is always on the bottom and moving around child forms can put them on top of each other, but main form is always on bottom. I created a simple test with main form and 2 child forms, 2 buttons on the main form execute For...

All of your callback methods are missing the __stdcall calling convention. That is why they are not overriding the IXAudio2VoiceCallback methods correctly. For example, this declaration: STDMETHOD_(void, OnStreamEnd) (THIS) PURE; Gets expanded to this: virtual void __stdcall OnStreamEnd() = 0; You c...

hello, to manage XAudio I am implementing an interface following the Microsoft specifications. When I compile though, I get the following error message which I can't explain to myself. The error, and that descriptive webpage for it, are pretty self-explanatory on this matter. The declaration of you...

I have found this code for Delphi. I have tried unsuccessfully to convert it to C++Builder. Can someone please help do this. Try this: const int ScreenWidth = 800; /* I designed my form in 800x600 mode.*/ const int ScreenHeight = 600; #pragma resource "*.DFM" // better: use the constructor's actual...

The problem is it is another Delphi code example. It seams no one uses C++Builder. Plenty of people use C++Builder. It is just more common to see examples and components written in Pascal because C++Builder includes a Delphi compiler, so code can be written one time in Pascal and used in both Delph...

void __fastcall TGraphe::Repere_cartesien(TObject *Sender) { TPaintBox *Graph; ... axe_ordonnees=Graph->Width/2; ... Graph->Canvas->Brush->Color=clBlack; ... } I see you declaring a local TPaintBox variable named Graph, but I don't see it being assigned to point at a valid TPaintBox object before y...

The image is updated by Image_P1->Bitmap->LoadFromFile(file_name_d); Image_P1->Repaint(); I can cycle through, and put next image as Image_P1 ... This works well, until It develops an out of memory error ... Is there a way to clean / wipe any memory of the image before recycling it ? Are you sure t...

Lena wrote: ↑Wed Nov 25, 2020 4:40 am

Code: Select all

Image1->Picture->Bitmap->FreeImage();
Image1->Picture->Bitmap = NULL; 

That will only work in VCL, not in FMX. There is no Picture property in FMX's TImage, and FMX's TBitmap does not have a FreeImage() method (it does have a FreeHandle() method, though).

In Android 7 the application crashes after a splash screen (I sent my apk). Crashes HOW exactly? Please be more specific. I don't have an Android 7 phone. Have you tried using Android 7 in any simulators? Does the crash happen in them, too? Where in your code does the crash happen exactly?

Hello, i have to write a simple decoder and I don't know how to start in builder. What don't you know about it exactly? Can you be more specific? Should I use fopen to load txt or it's named differently in rad? fopen() will work fine, though that is how to handle files in C. In C++, prefer to use t...

When starting RADStudio normally (without admin privs) the file, new menu options are very light on; only "other" and "customize ..." are displayed. However, if RADStudio is run as administrator it starts with a dialog stating that packages are being loaded, which takes a few seconds, then the file...

You cannot extend the Community Edition license. You are expected to let it expire first, and then afterwards download and install the latest Community Edition to get a new license emailed to you. Since CE hasn't been updated to 10.4 yet, you can skip the reinstall for now. Initiate a download, but ...

I have downloaded Builder C++ community edition two or three times, and every time, after the installation was completed, I started the program, wanted to create the new project and only Delphi options were possible. No option for C++ was visible, or possible to chose. I have explicitly downloaded ...

https://blogs.embarcadero.com/rad-studi ... mber-2020/

https://blogs.embarcadero.com/rad-studi ... ommentary/

Lena wrote: ↑Wed Nov 11, 2020 1:02 am One feature is not very good in BASS. Sometimes when the Internet is bad and I press the Play button, the stream is loaded without errors, but there is no sound.

You are going to have to take that up with BASS's author, or the BASS community.