在Delphi中实现任意形状的窗体

核心提示：Form的TEXT：object Form1: TForm1 Left = 192 Top = 107 BorderStyle = bsNone Caption = 'Form1' ClientHeight = 348 ClientWidth = 536 Color = clBtnFace

Form的TEXT：

object Form1: TForm1
  Left = 192
  Top = 107
  BorderStyle = bsNone
  Caption = 'Form1'
  ClientHeight = 348
  ClientWidth = 536
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = Button1Click
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
　  Left = 392
　  Top = 152
　  Width = 75
　  Height = 25
　  Caption = 'Button1'
　  TabOrder = 0
　  OnClick = Button1Click
  end
  object Button2: TButton
　  Left = 432
　  Top = 24
　  Width = 17
　  Height = 17
　  Caption = 'Button2'
　  TabOrder = 1
　  OnClick = Button2Click
  end
  object Button3: TButton
　  Left = 448
　  Top = 40
　  Width = 17
　  Height = 17
　  Caption = 'Button2'
　  TabOrder = 2
　  OnClick = Button3Click
  end
  object Button4: TButton
　  Left = 464
　  Top = 56
　  Width = 17
　  Height = 17
　  Caption = 'Button2'
　  TabOrder = 3
　  OnClick = Button4Click
  end
end

各种不同的事件声名：

  TForm1 = class(TForm)
　  Button1: TButton;
　  Button2: TButton;
　  Button3: TButton;
　  Button4: TButton;
　  PRocedure Button1Click(Sender: TObject);
　  procedure Button2Click(Sender: TObject);
　  procedure Button3Click(Sender: TObject);
　  procedure Button4Click(Sender: TObject);
  private
　  procedure WMmove(var Message: TWMNCHITTEST); Message WM_NCHITTEST;
　  { Private declarations }
  public
　  { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.WMmove(var Message: TWMNCHITTEST);
begin
  Message.Result :=  HTCAPTION;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
R1,R2,R3,R4,R5: HRGN;
begin
  R1 := CreateEllipticRgn(0,0,Round(ClientWidth / 2),ClientHeight);
  R2 := CreateEllipticRgn(Round(ClientWidth / 2),0,ClientWidth,ClientHeight);
  R3 := CreateEllipticRgn(Round(ClientWidth / 4 ),Round(ClientHeight / 4 *3),Round(ClientWidth / 4 *3),ClientHeight);
  R4 := CreateRectRgn(0,0,0,0);
  R5 := CreateRectRgn(0,0,0,0);
  CombineRgn(R4,R2,R1,RGN_or);
  CombineRgn(R5,R4,R3,RGN_or);

  SetWindowRGN(Handle,R5,True);
  DeleteObject(R1);
  DeleteObject(R2);
  DeleteObject(R3);
  DeleteObject(R4);
  DeleteObject(R5);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  SendMessage(Handle,WM_SYSCOMMAND,SC_MINIMIZE,0);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  SendMessage(Handle,WM_SYSCOMMAND,SC_DEFAULT,0);
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  application.Terminate;
end;

end.