how to use variables or packages of one program into another

[pavanponnapalli]

hi,
How can we use variables or packages of one program into another.
Say my first program name is First.pl, where i write the code like this:

         use DBI;
         use Apache::Request;
        ....................................
        ....................................
 
        my $a='hai';
        print "$a \n";
 

Now i want to use the same packages DBI,Apache::Request.
Also i would like to have the value of the variable in my second
program. How is it possible? Can i write something like
use folder::First; and i use the packages in my second program?


Cheers,
pavan