Columns in a Primary Key Index

Query to get the columns in a primary key for a table

select object_name(SI.id) tableName, SI.name indexName, SC.name
from sysindexes SI
inner join sysindexkeys SIK
on SIK.id = SI.id
and SIK.indid = SI.indid
inner join syscolumns SC
on SC.colid = SIK.colid
and SC.id = SI.id
where 1=1
and object_name(SI.id) = 'SalesHeader'
and SI.status in ( 2066 , 2048 )