Brush is the color if an inactive window border.
[Visual Basic] Public Shared ReadOnly Property InactiveBorder As Brush [C#] public static Brush InactiveBorder {get;} [C++] public: __property static Brush* get_InactiveBorder(); [JScript] public static function get InactiveBorder() : Brush;
SystemBrushes Class | SystemBrushes Members | System.Drawing Namespace