Where do i find the 32 bit libraries on my 64 bit ubuntu system

[Steven Truppe]

Hi all,

i want to write an application that works for both 32 bit and 64bit on 
my 64bit ubuntu system, my problem i only find 64bit libraries under 
/usr/lib, there is also a path callled /x86_64-linux-gnu/ <- are these 
the libraries i should use for 32 bit and 64 bit programming ??