delphi点击关闭按钮让窗体最小化

unit Unit1;

interface

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

type
TForm1 = class(TForm)
protected
procedure WMSysCommand(var Message: TWMSysCommand); message WM_SYSCOMMAND;
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMSysCommand(var Message: TWMSysCommand);
begin
case Message.CmdType of
SC_CLOSE: begin
Perform(WM_SYSCOMMAND, SC_MINIMIZE, 0);
Exit;
end;
end;
inherited;
end;

end.