OS X Folder Action to make Screenshot either public or not

gistfile1.scpt

on adding folder items to theWatchedFolder after receiving theDetectedItems
	
	set _public to "Macintosh HD:Users:me:Dropbox:Public:Screenshots"
	set _private to "Macintosh HD:Users:me:Dropbox:Photos:Screenshots"
	
	try
		
		set _choice to button returned of (display dialog "Share on DropBox?" buttons {"No", "Yes"} default button 2 cancel button "No")
		
		if _choice = "Yes" then
			tell application "Finder"
				move theDetectedItems to _public
			end tell
		end if
		
	on error
		
		tell application "Finder"
			--move theDetectedItems to _private
			open folder theWatchedFolder
			activate
		end tell
		
	end try
	
end adding folder items to