How do I minimize my installer in Inno Setup?

Question

I created my own custom minimize button in Inno Setup.

I would like to know how to minimize my installer when I click on it.

The minimize should be just like the default minimize button on the border of the installer.

Answer 1

To simulate a click on the minimize button in a window title, send WM_SYSCOMMAND message to the installer wizard form using the PostMessage support function:

const
  WM_SYSCOMMAND = 274;
  SC_MINIMIZE = $F020;

procedure MinimizeButtonClick(Sender: TObject);
begin
  PostMessage(WizardForm.Handle, WM_SYSCOMMAND, SC_MINIMIZE, 0);
end;