Sent to the delegate just after an animation is started.
Original signature is '- (BOOL)animationShouldStart:(NSAnimation *)animation'
Available in Mac OS X v10.4 and later.

C# | Visual Basic | Visual C++ |
public bool AnimationShouldStartMessage( NSAnimation animation )
Public Function AnimationShouldStartMessage ( _ animation As NSAnimation _ ) As Boolean
public: bool AnimationShouldStartMessage( NSAnimation^ animation )

- animation (NSAnimation)
- The NSAnimation object that was just started.

NO to cancel the animation, YES to have the animation proceed.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)