4.1  Dialogs

These functions get input from the user and/or display messages.

Procedures
    get-choices-from-user
    get-color-from-user
    get-directory
    get-file
    get-file-list
    get-font-from-user
    get-ps-setup-from-user
    get-text-from-user
    message-box
    message-box/custom
    put-file