Tells the delegate that the window is being resized (whether by the user or through one of the setFrame... methods other than setFrame:display:).
Original signature is '- (NSSize)windowWillResize:(NSWindow *)sender toSize:(NSSize)frameSize'
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
public event NSWindow..::..WindowWillResizeToSizeEventHandler WindowWillResizeToSize
Public Event WindowWillResizeToSize As NSWindow..::..WindowWillResizeToSizeEventHandler
public: event NSWindow..::..WindowWillResizeToSizeEventHandler^ WindowWillResizeToSize { void add (NSWindow..::..WindowWillResizeToSizeEventHandler^ value); void remove (NSWindow..::..WindowWillResizeToSizeEventHandler^ value); }

A custom size to which the specified window will be resized.

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