public static void SetFrames(NSViewAnimation aAnimation, Id aTarget, NSRect aStart, NSRect aEnd)
{
NSDictionary animDict = NSDictionary.DictionaryWithObjectsAndKeys(aTarget, NSViewAnimation.NSViewAnimationTargetKey,
NSValue.ValueWithRect(aStart), NSViewAnimation.NSViewAnimationStartFrameKey,
NSValue.ValueWithRect(aEnd), NSViewAnimation.NSViewAnimationEndFrameKey,
null);
aAnimation.ViewAnimations = NSArray.ArrayWithObject(animDict);
}