how to draw mac spinning wait cursor on application dock icon in cocoa

I want to draw animated dock icon with spinning wait cursor for my cocoa app. Please let me know how i can draw the spinning wai开发者_JS百科t cursor or where did i find the cursor file on mac.

Thanks

Don't put cursors anywhere but on the cursor. It would be really bad to make the user think their mouse has locked up.

Make a view that displays your application's icon, make an NSProgressIndicator a subview of it, and make the icon view the view of your application's Dock tile.