Declaration
function UnlockPaint(): integer;
Description
Decrement the 
lock paint counter (use after calling 
LockPaint).
If the lock count is zero, then 
Update is called to refresh the view.
Returns the lock count.
ImageEnView1.LockPaint();
ImageEnView1.ViewX := 10;
ImageEnView1.ViewY := 20;
ImageEnView1.Zoom := 300;
ImageEnView1.UnlockPaint();