-- Server uses this code:
	umsg.Start( "NetworkMessage", player )
		umsg.Short( 123 )
		umsg.String( "Hello" )
		umsg.Short( 456 )
	umsg.End()

-- Client uses this code:
function NetworkMessage(m)
	m:ReadShort()
	m:ReadString()
	m:ReadShort()
	....
end
usermessage.Hook( "NetworkHudMessage", NetworkHudMessage )