常用代码(Delphi 自我复制自我删除)

Delphi 自我复制源码
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;
Delphi 程序自删除.
运行Delphi，新建一个工程，添加一个Button到窗体上，全部代码如下：
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure DeleteMe; //自定义程序自杀过程
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
begin
DeleteMe;
end;
procedure TForm1.DeleteMe; //程序自杀
//-----------------------------------------------------------
function GetShortName(sLongName: string): string; //转换长文件名
var
sShortName: string;
nShortNameLen: integer;
begin
SetLength(sShortName, MAX_PATH);
nShortNameLen := GetShortPathName(PChar(sLongName),
PChar(sShortName), MAX_PATH - 1);
if (0 = nShortNameLen) then
begin
// handle errors...
end;
SetLength(sShortName, nShortNameLen);
Result := sShortName;
end;
//-------------------------------------------------
var
BatchFile: TextFile;
BatchFileName: string;
ProcessInfo: TProcessInformation;
StartUpInfo: TStartupInfo;
begin
BatchFileName := ExtractFilePath(ParamStr(0)) + '$$Delme$$.bat'; AssignFile(BatchFile, BatchFileName);
Rewrite(BatchFile);
Writeln(BatchFile, ':try');
Writeln(BatchFile, 'del "' + GetShortName(ParamStr(0)) + '"');
Writeln(BatchFile, 'if exist "' + GetShortName(ParamStr(0)) + '"' + ' goto try');
Writeln(BatchFile, 'del %0');
Writeln(BatchFile, 'cls');
Writeln(BatchFile, 'exit');
CloseFile(BatchFile);
FillChar(StartUpInfo, SizeOf(StartUpInfo), $00); StartUpInfo.dwFlags := STARTF_USESHOWWINDOW; StartUpInfo.wShowWindow := SW_Hide;
if CreateProcess(nil, PChar(BatchFileName), nil, nil, False, IDLE_PRIORITY_CLASS, nil, nil, StartUpInfo, ProcessInfo) then
begin
CloseHandle(ProcessInfo.hThread);
CloseHandle(ProcessInfo.hProcess);
end;
Application.Terminate;
end;
end.。