tell application "Mailsmith 1.1"
    
    --
    --  logic: if there are any messages in the trash, delete them.
    --  Piece o' cake.
    --
    
    set msgs to (every message of trash)
    if ((count of msgs) > 0) then
        
        --
        --  here we make sure that the user *really* wants to empty the
        --  trash. If you don't want to be warned, comment out the
        --  "display dialog" statement, and the "if" clause following
        --  it, and the next "end if", so that the resulting code
        --  just reads:
        --
        --      delete every message of trash
        --
        
        display dialog ¬
            "Are you sure you want to discard the messages in the trash?" buttons {"Yes", "No"} ¬
            default button 1
        
        if button returned of the result is "Yes" then
            delete every message of trash
        end if
    end if
    
end tell