In which files are UIDs used? (In Symbian v9.x)

a. in xxxApplication.cpp file static const TUid KUidXXXApp = {0xXXXXXXXX};
b. in .pkg file Header #{”XXX”},(0xXXXXXXXX),1,0,0
“..\sis\backup_registration.xml” -”!:\private\xxxxxxxx\backup_registration.xml”
private directory
c. in resource file xxx_reg-rss UID3 0xXXXXXXXX
d. when sending application to the background (HandleCommandL)
e. in paths to private directory
f. In project/properties!