Performs custom tasks when the slideshow is about to start.
Original signature is '- (void)slideshowWillStart'
Available in Mac OS X v 10.5 and later.

C# | Visual Basic | Visual C++ |
void SlideshowWillStart()
Sub SlideshowWillStart
void SlideshowWillStart()

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