where is the "LSSharedFileList.h"?
===

I wanna using the API of login item, but i can not find the LaunchServices/LSSharedFileList.h, which result in the errors, such as 'Undefined symbols for architecture x86_64:  "_kLSSharedFileListSessionLoginItems"'. 

Can anyone tell me which library I should add to project? I'm using objective-c in Xcode4.2 for osx10.7.