Shows the first page of the Snapshot Group Wizard. This page 
contains the following:
- An Available Links field that lets you choose Scheduled,
Public, or All
- Depending on your choice in the Available Links field,
database links are listed in the Database Link Name field
- A Cancel button, which closes the wizard
- A Help button, which opens context-sensitive online help
- A Back button (unavailable), which lets you go to the
previous page in the wizard
- A Next button, which lets you advance to the next page
in the wizard