title: How to make a tab invisible, but not the sheet that would show when the tab is selected? - Delphi FireMonkey
body: <p>I want to be able to open tabA from a button on tabB. But I don't want the user to be able to open tabA, apart from using that button. However if you set the <code>TabA.Visible := False</code> it sets the tab and the tab sheet as not visible. Is there any way around this?</p>
  
  <p>My idea would be to cover tabB with a blank white image when I need tabA showing, and when I need tabB showing just hide all the tabA controls. Would this be the best thing to do for this issue?</p>