How do I make the scroll bars show up on a TScrollBox?

Question

The TScrollBox control looks like it's supposed to basically be a TPanel with scroll bars attached along the bottom and the right edge. I tried placing one on a form, but no matter what I do, I can't make the scroll bars actually appear, either at design-time or at runtime. Does anyone know how to make them show up?

Answer 1

Set AutoScroll property to True.
Now if you add controls that clip the box borders, the bars will appear.

Answer 2

If I'm not mistaken (no Delphi around to check) it suffices to set HorzScrollBar.Range big enough.

EDIT: IIUC this DFM does what you want - entirely at design-time:

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 206
  ClientWidth = 312
  Color = clBtnFace
  ParentFont = True
  OldCreateOrder = True
  PixelsPerInch = 96
  TextHeight = 13
  object ScrollBox1: TScrollBox
    Left = 8
    Top = 8
    Width = 150
    Height = 150
    HorzScrollBar.Range = 300
    VertScrollBar.Range = 300
    AutoScroll = False
    TabOrder = 0
  end
end

Answer 3

Mason

You can't see the scrolling bars until there's actually something to scroll to.

To see the scrollbars try this

1.Set the BorderStyle property of the Form to bsSingle

2.Insert a button in a form

3.Put a scrollbar in a form

4.Set the Align property of the TScrollBox to alClient

5.Run this code in a button click

procedure TForm10.Button1Click(Sender: TObject);
Var
i : integer;
ed : TEdit;
begin
           for i:=1 to 30 do
           Begin
              ed:=TEdit.Create(self);
              ed.Parent:=ScrollBox1;
              ed.Top:=5+((i-1)*30);
              ed.Left:=10;
              ed.Width:=100;
              ed.Text:='Editext'+ IntToStr(i);
           End;
end;

Bye.