Let me know when someone says my name or calls a tow

[Tingle]

Well if your chat is being logged to a text document, you could just set up a timer to read the text document every couple of seconds and then using basic if statements, check if it contains any new instances of a certain string (ie, "is calling a tow").

Why don't you just use InSim.NET? It'll be 100x more efficient and easier to achieve what you're trying to do.