Edit the Samba configuration file smb.conf and add a share to the public directory.
Your path and information may vary from the example shown below. Just modify to suite your needs.
nano /etc/smaba/smb.conf
Add the following to the file
[public]
comment = EMR billing output
path = /usr/share/freeb/public
read only = No
browseable = Yes
Save the file
Restart Samba
/etc/init.d/sambad restart
From the windows machine map a network drive to the share called public.
This should get you started. You can add more to public share in the samba config like restricting it to a user or group.