D:\Temp>cd proj\lib

D:\Temp\proj\lib>hg pull -u
pulling from d:\Temp\lib
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved

D:\Temp\proj\lib>cd..

D:\Temp\proj>hg update
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved

D:\Temp\proj>