Dessiner un cadre de couleur autour de TForm

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
private
{ Private-Deklarationen }
procedure WMNCPaint( var Msg : TWMNCPaint); message WM_NCPAINT;
public
{ Public-Deklarationen }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMNCPaint( var Msg: TWMNCPaint);
var
dc : hDc;
Pen : hPen;
OldPen : hPen;
OldBrush : hBrush;
begin
inherited;
dc := GetWindowDC(Handle);
msg.Result := 1;
Pen := CreatePen(PS_SOLID, 2, RGB(0, 180, 255));
OldPen := SelectObject(dc, Pen);
OldBrush := SelectObject(dc, GetStockObject(NULL_BRUSH));
Rectangle(dc, 1,1, Form1.Width, Form1.Height);
SelectObject(dc, OldBrush);
SelectObject(dc, OldPen);
DeleteObject(Pen);
ReleaseDC(Handle, Canvas.Handle);
end;
end.