void SetMessage(string& asTextCategory, string& asTextEntry, float afTime);

[Jagsrs28]

asTextCategory - // aka "Messages" "Descriptions" "Inventory" and so on. Basicly categories in the .lang file.
asTextEntry - the entry in the .lang file // entry name, for example Category: Inventory Entry name: >"Key_1"<
afTime - determines how long the message is displayed. If time is < =0 then the life time is calculated based on string length. // TIME: HOW MUCH TIME THIS MESSAGE OF YOURS WILL BE DISPLAYED

I already knew that lol... I have it all documented into my computer. Its much easier to find things that way.