Ooops, my bad, it's really working. Actually I read the whole thread but what made me wrong is I didn't try it, I just read it.
I try to change the Id next to "quote" with the message Id of the locked topic and I'm surprised that the whole contents of the locked topic appeared.
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Well, it's really working. Nice tutorial mdayonliner. They might say that something like this topic has been discussed before but I'm still grateful that you've posted it here because if you didn't,  I won't found out a useful trick like this