TRect.Union function

class function Union(R1: TRect; R2: TRect): TRect; static
procedure Union(R: TRect)
class function Union
 (const Points: Array of TPoint = packed record
public
 X: LongInt;
 Y: LongInt;
 class function Zero: TPoint; static;
 function Add(const apt: TPoint): TPoint;
 function Distance(const apt: TPoint): ValReal;
 function IsZero: Boolean;
 function Subtract(const apt: TPoint): TPoint;
 SetLocation;
 Offset;
 function Angle(const pt: TPoint): Single;
 class function PointInCircle(const apt: TPoint; const acenter: TPoint; 
 const aradius: Integer): Boolean; static;
 TPoint.class operator =(const apt1: TPoint; const apt2: TPoint)
: Boolean;
 TPoint.class operator <>(const apt1: TPoint; const apt2: TPoint)
: Boolean;
 TPoint.class operator +(const apt1: TPoint; const apt2: TPoint): TPoint;
 TPoint.class operator -(const apt1: TPoint; const apt2: TPoint): TPoint;
 TPoint.class operator :=(const aspt: TSmallPoint): TPoint;
 TPoint.class operator explicit(const apt: TPoint): TSmallPoint;
end
)
: TRect; static