GPG Passphrase Caching

[Matthew Loring]

I am using the binary version of GPG for Windows, version 1.47.  
Everything works fine, but I have a need to automatically decrypt  
files through a script. The hangup that I have right now is that GPG  
wants me to enter in my passphrase when decrypting files. Is there a  
way to cache the passphrase or save it in a file so that it does not  
prompt me to enter my passphrase for my secret key?