标题：关于拉幕程序的讨论和源码

begin
if Edit1.Text=' then ShowMessage('请输入文件地址')
else
begin
if Button2.Caption='开始' then Button2.Caption:='暂停'
else Button2.Caption:='开始';
Timer1.Enabled:=not Timer1.Enabled;
end;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
timer1.Enabled :=false;
Currline:=0;
Button2.Click;
Button2.Caption:='暂停';
end;

procedure TForm1.TrackBar1Change(Sender: TObject);
begin
Timer1.Interval:=TrackBar1.Position*5;
Label2.Caption:=inttostr(Timer1.Interval);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
if Bmp<>nil then Bmp.Free;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
close;
end;


procedure TForm1.Button7Click(Sender: TObject);
begin
FontDialog1.Execute;
end;

procedure TForm1.Button6Click(Sender: TObject);
begin
ColorDialog1.Execute;
end;

procedure TForm1.Button8Click(Sender: TObject);
begin
if ((strtoint(Edit2.Text)>=600) or (strtoint(Edit3.text)>=500) or ((strtoint(Edit5.Text)>=553) or (strtoint(Edit4.Text)>=630)))
then showmessage('范围超界')
else
begin
Panel1.Top:=strtoint(Edit2.text);
Panel1.Left:=strtoint(Edit3.text);
Panel1.Width:=strtoint(Edit4.text);
Panel1.Height:=strtoint(Edit5.text);
end;

end;



procedure TForm1.Button5Click(Sender: TObject);
begin
Panel1.Top:=0;
Panel1.Left:=0;
Panel1.Width:=Panel3.Width;
Panel1.Height:=Panel3.Height;
end;

end.