Delphi 7 delete some character from memo lines

Question

I have the lines in memo like:

111111.kll
222222.kll

I need to remove last 4 char from each line to obtain result like:

111111
222222

Answer 1

As an alternative to GolezTrol's solution, you can manipulate the Memo content directly, instead of making a copy of it in memory first:

var
  i, LineStart, LineLen: Integer;
begin
  Memo1.Lines.BeginUpdate;
  try
    for i := 0 to Memo1.Lines.Count - 1 do
    begin
      LineStart := Memo1.Perform(EM_LINEINDEX, i, 0);
      LineLen := Memo1.Perform(EM_LINELENGTH, LineStart, 0);
      Memo1.Perform(EM_SETSEL, LineStart + LineLen - 4, LineStart + LineLen);
      Memo1.SelText := '';
    end;
  finally
    Memo1.Lines.EndUpdate;
  end;
end;