title: How can I create an internal timer that will work with VCL and FMX?
body: <p>I have a class that requires a timer. The class must work with both VCL and FMX. Unfortunately, the FMX timer is declared in <code>FMX.Types</code> and the VCL timer in <code>Vcl.ExtCtrls</code>.</p>
  
  <p>As there is no conditional define like <code>{$IFDEF FMX}xxx{$ENDIF}</code> how do I use a timer in a cross platform class?</p>