Can you pull variables from different fields from the sql tables to use in the custom actions?

example: to ping a computer the command is "cmd.exe /K "ping.exe {computer}"

I want to ping the fully qualified name... can you use the DNSHostname from the ADComputers table?

Thank you sir,

Is there a list anywhere of the variables we can use in the custom actions?

So is there no way to use a custom scanned registry value in a custom action?

For example:

I'm using a 3rd party remote control tool that gives each client a custom ID number and stores it in the registry. I have added this scan option so that the info is in the database, now I just need to know how to pass that ID number into my custom action.