[ferret_users] How to define a variable holding directory path?

["C. Shaji" <cshaji@xxxxxxxxxxxxxxxxxxxxx>]

Hello All,
I would like to define a variable holding a directory path and then use it
as an argument in calling program and pass it to the main programto use it
there. Can somebody suggest me the correct format to do this?

For eg. in the calling program
define symbol dirname = "?DATA/...../month"

Thanks in advance,
C. Shaji