How to change form content?

Question

Delphi

There is a small project on Delphi 7. Its essence is that when a button is pressed, the contents of the window should change.
For example, I select click on the button, and 3 other buttons appear

Answer 1

For such a task, TPageControl is well suited. Each form state on its own tab. It will not be necessary to change the visibility of a bunch of controls - just switch the tabs. And there will be no porridge from controls in the design. Hide tabs on tabs.

Answer 2

You can make a GroupBox or Panel, add components there. Next, you specify GroupBox.Visible = false
When you click on the button, write GroupBox.Visible=true

Answer 3

var
  Button : TButton;
begin
  Button := TButton.Create(Self);
  Button.Parent := pnlBottom;
  Button.Caption := 'Some caption';
  Button.Left := 600;
end;