How do you lock your Downloads in a thread?

I am probbably not the only one who's asking this, and i feel like if someone was to reply, it would help a lot of people on the forums...
Thanks <3

You do [hide] (message/download link) [/h ide] without the space between h and ide

You can see your Thread in Full Editor mode, in that you can choose myBB Code. There you'll see "(TB) Hide Content".
It will bring you up two brackets [I'm a bracket], [me too], and you just put your content to "Lock" in between these two.