[jafera]

Solucionado

Buscando, buscando he adoptado este código:

Código Delphi [-]
procedure TF_Inici.ToolButton8Click(Sender: TObject);
var SearchRec: TSearchRec;
begin
        if MDIChildCOUNT > 0 then
        begin
                ShowMessage('Hi han finestres obertes, tanca-les totes abans de sortir');
                Abort;
        end
        else
        begin
                if FindFirst('C:\Gestio_Arbitral_1.0\Temp\*.*', faAnyFile, SearchRec) = 0 then
                repeat
                    Deletefile('C:\Gestio_Arbitral_1.0\Temp\'+SearchRec.name);
                until (FindNext(SearchRec) <> 0);
                FindClose(SearchRec);

                Close;
        end;
end;

Gracias a todos

Josep