Really simple window title bar / window frame customization tool for Windows target on HXCPP and HashLink
Titlebar.setTitlebarColor(50, 20, 80);
Titlebar.setTitleFontColor(200, 180, 240);
Titlebar.setButtonFontColor(20, 10, 30);
Titlebar.setTitleFont("Pixel Arial 11", 'assets/fonts/pixel-latin.ttf', 16);
Titlebar.initialize();Titlebar.setTitlebarImage('assets/images/pattern.bmp');
Titlebar.setTitleFontColor(200, 180, 240);
Titlebar.setButtonFontColor(20, 10, 30);
Titlebar.setTitleFont("Pixel Arial 11", 'assets/fonts/pixel-latin.ttf', 16);
Titlebar.initialize();To get the font's name for the first argument of the function setTitleFont you need to open your font file, and grab the name from there, it's found in the top left corner

(written by someguywholovescoding)
If you've installed this library, run haxelib run hxcpp build_hl.xml -D HASHLINK="your\hashlink\path" at the same path of the titlebar utility class file. Then, drag the hdll over to your export bin.
And after that, you move your hdll over to your export/hl/bin folder of your app.