...in einem Verzeichnis-Baum nach einer bestimmten Datei suchen?

uses
  ImageHlp;

function SearchForFile(const ARootPath: string;
                       const AFileName: string;
                       var APathFound: string): Boolean;
var
  Found: array[0..500] of Char;
begin
  FillChar(Found, SizeOf(Found), #00);
  Result := (SearchTreeForFile(PChar(ARootPath), PChar(AFileName), Found) = True);
  APathFound := ExtractFilePath(Found);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  APathFound: string;
begin
  if SearchForFile('C:\WINDOWS\', 'winhlp32.exe', APathFound) then
    ShowMessage('winhlp32.exe found in: ' + APathFound);
end;

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