Apache modules - global memory and interconnect between modules

Hi,

I have searched the archives for the following queries but could't
find them, so querying here, expecting any apache modules developer to
answer.

1. In my module i am having a String which is to be exist till the
server shutdown. i found we can make a sub pool from pglobal or other
in hierarchy. From where can i get the reference of that global pool
and how can i make a sub-pool for it.

2. After created the sub-pool and register the string with the sub
pool , how can i get the reference for each child process or from
another module.


Thanks in Advance!