this is a program that sends messages over a network to computers running messenger (those who have hit start or have it running by other means)
the first text box is for the name of the computer the messege is to be sent to("*" for all on the network). the second is for the message.
be able to run messenger it needs to be enabled. to do that go into:
control panel
	administrative tools
		services > set the startup type to either manual or automatic

the above only needs to be done once. automatic starts messenger when you log on
manual makes it possible to start messenger