Rename Directory

uses ExtCtrls, ShellApi

//

procedure RenameDir(DirFrom, DirTo: string);
var
  shellinfo: TSHFileOpStruct;
begin
  with shellinfo do
  begin
    Wnd    := 0;
    wFunc  := FO_RENAME;
    pFrom  := PChar(DirFrom);
    pTo    := PChar(DirTo);
    fFlags := FOF_FILESONLY or FOF_ALLOWUNDO or
              FOF_SILENT or FOF_NOCONFIRMATION;
  end;
  SHFileOperation(shellinfo);
end;

Beispiel :

procedure TForm1.Button1Click(Sender: TObject);
begin
  RenameDir('C:\tempa', 'C:\tempb');
end;