ALARM Program description:

When started with command line parameters, it starts as an icon and
waits until the specified to popup with specified message in a window. 
When started without parms, it starts as a window with dialog box and
prompts for notification time and message.

Command format:

ALARM nn:nn "message"

  Where nn:nn is the time in 24:00 hour format
  message is the text message to display

Example:

ALARM 16:30 "Go home!"

  This will display the message "Go home!" at 4:30 pm.