unit1.~pas

本光盘是《Delphi 7应用教程》一书的配套光盘

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    ScrollBar1: TScrollBar;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    procedure ScrollBar1Change(Sender: TObject);
    procedure Edit1Change(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ScrollBar1Change(Sender: TObject);
begin
  Edit1.Text :=inttostr(ScrollBar1.Position );//在编辑框中显示滚动条的位置值
end;

procedure TForm1.Edit1Change(Sender: TObject);
begin
  if edit1.text='' then
     scrollBar1.Position :=0 //如果编辑框的文本为空，设滚动条的位置值为0
  else
      ScrollBar1.Position :=strtoint(Edit1.text);//用滚动条的位置值反映输入的数字
end;

end.