Applescript to delete Mail message [newbie]

I believe there are some Applescripters on here? .. I'm trialling Hazel, and would like it to do the following for me:
• copy .emlx files from certain Mail.app folders (i.e. in -/Library/Mail) to a folder in -/Documents
• add text to Spotlight comments on the copies
• have Mail.app delete the original messages

The first two of these are working a treat, but I'm stuck on the last. I'm hoping for an applescript that could be triggered by the Hazel rule. I've managed a script that works independently of Hazel, but Hazel can't run it. here's the script I've created in my scripto-ignorance:

tell application "Mail"

set theMessage to message 1 of mailbox "Archive"
delete theMessage
end tell

Can someone help me edit to work with Hazel? Thanks.

Check the Help. There's a specific handler you have to use. Just plop your code into it.

Thanks for that. I assume it's just a case of pasting "on hazelProcessFile(infile)" in at the top of my existing script, and pasting "end hazel_process_file" at the bottom? If so, I've done that.

I guess I'm now left with just one point of uncertainty (NB: I'm neither a general geek nor an AS geek.) I'm wondering whether my use of "message 1" in my script will correctly point to the same message that Hazel is currently acting on, or whether it might point to another one ... (in which case, might I end up deleting a message Hazel hasn't got to yet -- and hence never will get to!)

Any insights ... ?

I haven't played with using AppleScript with Mail much so I'm not sure what message is being referred to nor do I know a good way to correlate the file (which would be the emlx file, I assume) to a message that Mail would recognize in AppleScript. I'd exercise caution here and maybe do something non-destructive to the message (like coloring or flagging it) until you can get the logic right, if it's possible at all.