The PGPNotes Control implements the passphrase caching feature in PGPNotes. Without the PGPNotes Control, you will be prompt to enter your PGP passphrase everytime you encrypt or decrypt a message using PGPNotes. PGPNotes Control caches the passphrase in memory for some minutes of inactivity before prompting you for the passphrase again. PGPNotes Control also allows you to enter configuration information for PGPNotes. It can be hidden to the system tray area as a small icon. A popup menu containing all its functions will appear when you right-click on the system tray icon.