unit1.pas

delphi6.0 的控件示例

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Panel1: TPanel;
    RichEdit1: TRichEdit;
    procedure RichEdit1KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.RichEdit1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  CurrentLine:Integer;
begin
  CurrentLine:=RichEdit1.Perform(em_LineFromChar,-1,0);
  Label1.Caption:=IntToStr(CurrentLine+1);
end;

end.