I had a problem recently and needed to set a font colour depending what was set as a system colour, in Delphi this ended up being very easy. To get say the highlight colour just do the following:
GetSysColor(COLOR_HIGHLIGHT)
This returns the colour as a TColor, I then used this value in a previous function to determine whether is was light or dark and then set the font colour accordingly. This will require 'Windows' and 'Graphics' in the uses clause. The 'color_highlight' is a constant, go to where it is declared in the windows unit to see the other options.
Serving my thoughts and experiences of developing software with Embarcadero Delphi
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