I don\'t know whether this question can be answered here, but I hope it will. I wrote a simple text editor in Delphi 7 that serves as my primary IDE for writing C code under Win
I'm using Delphi XE8 and the following seems to do the trick:
ATabControl.Tabs.Clear; ATabControl.Style := TTabStyle.tsFlatButtons; ATabControl.Brush.Color := clWhite;