Memo 的当前行、当前列与当前字符

procedure TForm1.Memo1Click(Sender: TObject);
begin
  Text := Format('当前列:%d, 当前行:%d', [Memo1.CaretPos.X, Memo1.CaretPos.Y]);
end;

//用 API 实现
procedure TForm1.Memo1Click(Sender: TObject);
var
  LineY,LineX: Integer;
begin
  LineY := SendMessage(Memo1.Handle,EM_LINEFROMCHAR,Memo1.SelStart,0);
  LineX := SendMessage(Memo1.Handle,EM_LINEINDEX,LineY,0);
  Text :=  '当前行：' + IntToStr(LineY) + '; ' +                  //0开始
          '当前列：' + IntToStr(Memo1.SelStart - LineX) + '; ' +   //0开始
          '当前字符：' + IntToStr(Memo1.SelStart) + '. ';          //包括#13#10
end;

---

//统计字数

//添加 Memo1、Label1、Label2、还有Button1
procedure TForm1.Button1Click(Sender: TObject);
var
  s: string;
  i,sum,e,c,t: Integer;
begin
  s := Memo1.Text;
  e := 0;
  c := 0;
  sum := Length(s);

  for i := 0 to sum do
  begin
    if (Ord(s[i]) >= 33) and (Ord(s[i]) <= 126) then
    begin
      Inc(e);
      Label1.Caption := '字母数: ' + IntToStr(e);
    end;

    if Ord(s[i]) >= 127 then
    begin
      Inc(c);
      Label2.Caption := '汉字数: ' + IntToStr(c div 2);
    end;
  end;
end;