Arrondir des coins sans image

Salut,
Je voudrait arrindir les coins de mon Form sans images.... est-ce possible? et Comment?
Merci :roll:

:arrow:
code pris sur Torry.net

Code:

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procedure TForm1.FormCreate(Sender: TObject); 
var 
  rgn: HRGN; 
begin 
  Form1.Borderstyle := bsNone; 
  rgn := CreateRoundRectRgn(0,// x-coordinate of the region's upper-left corner 
    0,            // y-coordinate of the region's upper-left corner 
    ClientWidth,  // x-coordinate of the region's lower-right corner 
    ClientHeight, // y-coordinate of the region's lower-right corner 
    40,           // height of ellipse for rounded corners 
    40);          // width of ellipse for rounded corners 
  SetWindowRgn(Handle, rgn, True); 
end 
 
 
{ The CreatePolygonRgn function creates a polygonal region. } 
 
 
procedure TForm1.FormCreate(Sender: TObject); 
const 
  C = 20; 
var 
  Points: array [0..7] of TPoint; 
  h, w: Integer; 
begin 
  h := Form1.Height; 
  w := Form1.Width; 
  Points[0].X := C;     Points[0].Y := 0; 
  Points[1].X := 0;     Points[1].Y := C; 
  Points[2].X := 0;     Points[2].Y := h - c; 
  Points[3].X := C;     Points[3].Y := h; 
 
  Points[4].X := w - c; Points[4].Y := h; 
  Points[5].X := w;     Points[5].Y := h - c; 
 
  Points[6].X := w;     Points[6].Y := C; 
  Points[7].X := w - C; Points[7].Y := 0; 
 
  SetWindowRgn(Form1.Handle, CreatePolygonRgn(Points, 8, WINDING), True); 
end;

Merci Beaucoup!