How to make a hint?

[Shadowfied]

If you just want a normal message appearing the simplest way would be to use SetMessage.

SetMessage("LangCategoryHere", "LangEntryHere", 0);

LangCategory = Category name in the extra_english.lang file
LangEntry = Entry name in that same category
0 = Time to display. If you put 0 the game will decide automatically how long it will stay on screen depending on how long the message is, which is really awesome.

I use SetMessage for any messages and it's very quick and easy.