procedure FastFileCopy(Const InfileName, OutFileName: String; CallBack: TCallBack);

Const BufSize = 3*4*4096; { 48Kbytes дает прекрасный результат }

Type

 PBuffer = ^TBuffer;

 TBuffer = array [1..BufSize] of Byte;

var

 Size : integer;

 Buffer : PBuffer;

 infile, outfile : File;

 SizeDone,SizeFile: Longint;

begin

 if (InFileName <> OutFileName) then begin

  buffer := Nil;

  AssignFile(infile, InFileName);

  System.Reset(infile, 1);

  try

   SizeFile := FileSize(infile);

   AssignFile(outfile, OutFileName);

   System.Rewrite(outfile, 1);

   try

    SizeDone := 0; New(Buffer);

    repeat

     BlockRead(infile, Buffer^, BufSize, Size);

     Inc(SizeDone, Size);

     CallBack(SizeDone, SizeFile);

     BlockWrite(outfile,Buffer^, Size)

    until Size < BufSize;

    FileSetDate(TFileRec(outfile).Handle,

    FileGetDate(TFileRec(infile).Handle));

   finally

    if Buffer <> Nil then Dispose(Buffer);

    System.close(outfile)

   end;

  finally

   System.close(infile);

  end;

 end else Raise EInOutError.Create('File cannot be copied into itself');

end;

Копирование методом потока

Procedure FileCopy(Const SourceFileName, TargetFileName: String);

Var

 S,T : TFileStream;

Begin

 S := TFileStream.Create(sourcefilename, fmOpenRead );

 try

  T := TFileStream.Create(targetfilename, fmOpenWrite or fmCreate);

  try

   T.CopyFrom(S, S.Size ) ;

   FileSetDate(T.Handle, FileGetDate(S.Handle));

  finally

   T.Free;

  end;

 finally

  S.Free;

 end;

end;

Копирование методом LZExpand

uses LZExpand;

procedure CopyFile(FromFileName, ToFileName : string);

var

 FromFile, ToFile: File;

begin

 AssignFile(FromFile, FromFileName);

 AssignFile(ToFile, ToFileName);

 Reset(FromFile);

 try

  Rewrite(ToFile);

  try

   if LZCopy(TFileRec(FromFile).Handle, TFileRec(ToFile).Handle)<0 then raise Exception.Create('Error using LZCopy')

  finally

   CloseFile(ToFile);

  end;

 finally

  CloseFile(FromFile);

 end;

end;

Копирование методами Windows

uses ShellApi; // !!! важно

function WindowsCopyFile(FromFile, ToDir : string) : boolean;

 var F : TShFileOpStruct;

begin

 F.Wnd := 0; F.wFunc := FO_COPY;

 FromFile:=FromFile+#0; F.pFrom:=pchar(FromFile);

 ToDir:=ToDir+#0; F.pTo:=pchar(ToDir);

 F.fFlags := FOF_ALLOWUNDO or FOF_NOCONFIRMATION;

 result:=ShFileOperation(F) = 0;

end;

// пример копирования

procedure TForm1.Button1Click(Sender: TObject);

begin

 if not WindowsCopyFile('C:\UTIL\ARJ.EXE', GetCurrentDir) then ShowMessage('Copy Failed');

end;

Как скопировать все файлы вместе с подкаталогами

uses ShellApi;

procedure TForm1.Button1Click(Sender: TObject);

var

 OpStruc: TSHFileOpStruct;

 frombuf, tobuf: Array [0..128] of Char;

Begin

 FillChar( frombuf, Sizeof(frombuf), 0 );

 FillChar( tobuf, Sizeof(tobuf), 0 );

 StrPCopy( frombuf, 'h:\hook\*.*' );

 StrPCopy( tobuf, 'd:\temp\brief' );