Notifies the delegate that the drawer will open.
Original signature is '- (void)drawerWillOpen:(NSNotification *)notification'
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
public void DrawerWillOpenMessage( NSNotification notification )
Public Sub DrawerWillOpenMessage ( _ notification As NSNotification _ )
public: void DrawerWillOpenMessage( NSNotification^ notification )

- notification (NSNotification)
- An NSDrawerWillOpenNotification notification, sent by the default notification center immediately before the drawer is opened.

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