计算字符的长度

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Label1: TLabel;
Label2: TLabel;
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
procedure Edit1Change(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
close;                                              //关闭窗口
end;

procedure TForm1.Edit1Change(Sender: TObject);        //编辑框1中的内容改变时的事件
var
stringlength: integer;                              //记录编辑框1中的字符个数
begin
stringlength := edit1.GetTextLen;                   //获取编辑框1中的字符个数
edit2.Text := inttostr(stringlength);               //编辑框2显示编辑框1中的字符个数
end;

end.