在object - c中，如何以编程方式在Mac OS X中设置文件的默认“open with”属性

In creating some .mov files using Cocoa (Obj-C), I'd like to set them to be opened by default by a specific program, instead of the default. This should be a file level property, I do not wish to change the default program for all files with the same extension. This is to be done from Cocoa itself, as opposed to manually in "context menu">>"Get Info">>"Open With".In creating some .mov files using Cocoa (Obj-C)