Using custom styles
If we do not want to use a built-in style, we can always use a custom style. The Delphi installation comes with a number of custom styles. In Delphi 10.2 on Windows 10, FireMonkey custom styles are installed into the C:\Users\Public\Documents\Embarcadero\Studio\19.0\Styles directory. FireMonkey styles are files with the *.style extension. If we preview a FireMonkey style file with a text viewer, we will see that its content looks very much like a form file that we design with Form Designer inside the IDE.
It is good practice not to put non-visual components such as stylebooks directly on the form, but on a dedicated data module instead. Select File | New | Other from the main menu. In the New Items dialogs, select the Delphi Files category and choose to add a new Data Module to the project:
New Data Module in New Items dialog
Save the unit as uDMStyles. Change the Name property of the data module to DMStyles. Make sure that the data module is created before the application...
