automate pga clipboard

[tim.dclinc at gmail.com]

i am using GPA 0.9.9 to encrypt text file data. i copy/paste my text 
into the clipboard and hit encrypt. Im prompted to choose public key. 
After choosing, i get the following results (less the blah blahs).

I would like to do this from a command line so i can do unattended. can 
this be done? does anyone have examples of syntax?

-----BEGIN PGP MESSAGE-----
Version: GnuPG v2
blah..
blah..
blah..
-----END PGP MESSAGE-----