Returns the number of items that the preview panel should preview.
Original signature is '- (NSInteger)numberOfPreviewItemsInPreviewPanel:(QLPreviewPanel *)panel'
Available in VERSION and later.

C# | Visual Basic | Visual C++ |
NSInteger NumberOfPreviewItemsInPreviewPanel( QLPreviewPanel panel )
Function NumberOfPreviewItemsInPreviewPanel ( _ panel As QLPreviewPanel _ ) As NSInteger
NSInteger NumberOfPreviewItemsInPreviewPanel( QLPreviewPanel^ panel )

- panel (QLPreviewPanel)
- The preview panel.

The number of items that the preview panel should preview.

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