I found that all these command combinations handles by app menu!
Why don't anything tells about this in help?
Oh, it's default behaviour for mac os programs.
And i found in help
"Copy and paste functionality is commonly triggered through menu commands and keyboard shortcuts. On OS X, an edit menu with the copy and paste commands is automatically created by the operating system, but you must add listeners to these menu commands to hook up your own copy and paste functions. On Windows, you can add a native edit menu to any window that uses system chrome. (You can also create non-native menus with Flex and ActionScript, or, in HTML content, you can use DHTML, but that is beyond the scope of this discussion.)"