How to create a modal window

I am very new in cocoa for MAC. I created a NSWindow and i add a NSButton as subview in the NSWindow.

I want to show a modal window from click the NSButton. I saw the http://develop开发者_Go百科er.apple.com/library/mac/#documentation/Cocoa/Conceptual/WinPanel/Concepts/UsingModalWindows.html reference. But it is not so easy for beginner like me.

Thanks in advance

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Modal dialogs are not as prevalent in the Mac operating system and are generally considered bad form. The only truly accepted modal dialog is a sheet which you attach to the window that it applies to.

Avoid modal modes when programming for the Mac when possible.

References:

• http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Sheets/Sheets.html#//apple_ref/doc/uid/10000002-BABFIBIA
• http://www.cocoadev.com/index.pl?DisplayingSheets