Delphi 把Form界面设置有弧度的矩形

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Edit1: TEdit;
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormShow(Sender: TObject);
var
  Rgn: HRGN;
begin
  //参数:Handle的左上角left top  右下角right bottom   弧度0-->255
  Rgn := CreateRoundRectRgn(0,0, width,height,50,50);
  SetWindowRgn(handle, Rgn, True);

  //若是Panel1设置弧度:BorderStyle 最好设成 bsNone
  //若是Panel1设置弧度:BevelInner和BevelOuter 最好设成 bvNone
end;

end.