Horizontal
Vertical
ForwardDiagonal
BackwardDiagonal
DobleHorizontal
DoubleVertical
DoubleForwardDiagonal
DoubleBackwardDiagonal
Center

procedure THIGDIPFormGradient.DrawForm(ACanvas: PCanvas; const ARect: TRect;
                AColor1,AColor2: TColor);
const
  w: integer = 0;
  h: integer = 0;

var
  Graphics: TGPGraphics;
  GPRect: TGPRect;
  Pen: TGPPen;
  Brush: TGPBrush;
  BrushColor: TGPColor;
  PenColor: TGPColor;
  Color1,Color2: TGPColor;
  GradBrush: TGPLinearGradientBrush;
  R: TRect;
  GPReg: TGPRegion;
begin
  R := FForm.ClientRect;
  // Создаём график
  Graphics := TGPGraphics.Create(ACanvas.Handle);
  // Создаём прямоугольник
  GPRect := GDIPAPI.MakeRect(0, FPanel2.Height,FForm.Width,r.Bottom-FPanel2.Height);
  // создаём перо для контура
  PenColor := IntToGPColor(_prop_Color3,{_prop_Alpha1}255);
  Pen := TGPPen.Create(PenColor,(_prop_BorderSize));

  Color1 := IntToGPColor(AColor1,{_prop_Alpha1}255);
  Color2 := IntToGPColor(AColor2,{_prop_Alpha2}255);

  if _prop_StyleBkgnd = 0 then
    Brush := TGPSolidBrush.Create(IntToGPColor(FForm.Color,255));

  // заливка прямоугольника
  if _prop_StyleBkgnd = 1 then // Gradient
    Brush := TGPLinearGradientBrush.Create(GPRect, Color1, Color2, LinearGradientModeVertical);

  if _prop_StyleBkgnd = 2 then // Brush GDI+
    Brush := TGPHatchBrush.Create(THatchStyle(_prop_BrushID),Color1, Color2);

  //if _prop_StyleBkgnd = 3 then // UseBrush
  //  Brush := TGPTextureBrush.Create();

  Graphics.FillRectangle(Brush,GPRect);
  // рисуем контур
  if _prop_BorderSize >= 1 then
  begin
    GPRect := GDIPAPI.MakeRect(0, 0,FForm.Width,FForm.Height);
    Graphics.DrawRectangle(Pen,GPRect);
  end else //begin
    Graphics.DrawLine(Pen,0,0,FForm.Width,0);

  Pen.Free;
  Brush.Free;
  Graphics.Free;
end;