Código Delphi [-] procedure TForm1.EditKeyPress(Sender: TObject; var Key: Char); begin with Sender as TEdit do ReadOnly := (SelStart + SelLength = 0) and (Key in ['0'..'9']); end;
procedure TForm1.EditKeyPress(Sender: TObject; var Key: Char); begin with Sender as TEdit do ReadOnly := (SelStart + SelLength = 0) and (Key in ['0'..'9']); end;