TImageEnMView.TransitionRunning
 
Declaration
property TransitionRunning: Boolean;
Description
Returns 
true when a 
transition is running.
// Design time properties...
ImageEnMView1.DisplayMode        := mdSingle;
ImageEnMView1.TransitionEffect   := iettCrossDissolve;
ImageEnMView1.TransitionDuration := 1500;
// display next frame using cross dissolve
ImageEnMView1.VisibleFrame := ImageEnMView1.VisibleFrame + 1;
// wait for the transition to end
While ImageEnMView1.TransitionRunning do
  Application.processmessages;
ShowMessage('transition done!');