unit1.pas

在delphi中实现windows核心编程.原书光盘代码核心编程.原书光盘代码

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    OpenDialog1: TOpenDialog;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
function RecycleFile(sFileName: string): Boolean;
var
  FOS: TSHFileOpStruct;
begin
   FillChar(FOS, SizeOf(FOS), 0);
   with FOS do
      begin
         wFunc := FO_DELETE;
         pFrom := PChar(sFileName);
         fFlags := FOF_ALLOWUNDO;
      end;
   Result := (SHFileOperation(FOS) = 0);
end; 



procedure TForm1.Button1Click(Sender: TObject);
begin
 if fileexists(edit1.text) then
   RecycleFile(edit1.Text + #0);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  if opendialog1.Execute then
    edit1.text:=Opendialog1.filename;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
   close;
end;

end.