[[ArdiIIa]]

Veamos

Código Delphi [-]
procedure TForm1.ContarLetras(Sender: TObject);
Var
I,Z: Integer;
cTemp :  String;
begin
Z := 0;
cTemp := Memo1.Lines.Text;
For I := 1 To  Length(cTemp) DO
if ord(cTemp[i]) < 32 then
inc(Z);

ShowMessage( IntToStr( Length(cTemp) - Z ));

end;