Locate a record on a browse using multi component key

questions
1

I have a browse procedure on a file ordered by a multi component key

MyFile FILE,DRIVER('TOPSPEED') ......
MyKey KEY(TBL:AreaNumber,TBL:ItemId),DUP,NOCASE,OPT

Record                   RECORD,PRE()
AreaNumber                          LONG      
ItemId                              LONG  
....

I’m trying to use locator class to be able to locate first record with a given AreaNumber and ItemId, but it only seems to work for single component keys. How can I locate a record and positon the browse cursor on the first last matching entry