Returns whether the collection view can attempt to initiate a drag for the given event and items.
Original signature is '- (BOOL)collectionView:(NSCollectionView *)collectionView canDragItemsAtIndexes:(NSIndexSet *)indexes withEvent:(NSEvent *)event'
Available in Mac OS X v10.6 and later.

C# | Visual Basic | Visual C++ |
public bool CollectionViewCanDragItemsAtIndexesWithEventMessage( NSCollectionView collectionView, NSIndexSet indexes, NSEvent event )
Public Function CollectionViewCanDragItemsAtIndexesWithEventMessage ( _ collectionView As NSCollectionView, _ indexes As NSIndexSet, _ event As NSEvent _ ) As Boolean
public: bool CollectionViewCanDragItemsAtIndexesWithEventMessage( NSCollectionView^ collectionView, NSIndexSet^ indexes, NSEvent^ event )

- collectionView (NSCollectionView)
- The collection view that send the message.
- indexes (NSIndexSet)
- The indexes of the proposed dragging items.
- event (NSEvent)
- The mouse down event that initiated the drag.

YES if the items can attempt to initiate a drag for the specified items, otherwise NO.

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