Got questions about networking or multiplayer?

Thanks Andres, I will fix those in the next update :)

Here is a simple chat program for Blitzmax:
It uses the TNet Multiplayer Library and shows how you can quickly set up a client-server game and send messages.

Import Truplo.TNet_Advanced

Graphics 300,300,0

Const HostPort = 44444
Const CHAT = 1 ' Message Type for Normal Chat Messages

Local WantToHost = True ' True to Host

Select WantToHost
	Case True
		If TNet_HostUDP( HostPort ) = False RuntimeError "Port "+HostPort+" already in use!"
	Case False 
		Local IPofHost$ = "127.0.0.1" ' Use 127.0.0.1 to connect to yourself
		If TNet_JoinUDP( IPofHost$, HostPort ) = False RuntimeError "Cannot find host!"
EndSelect

Repeat 						' -------------- -L -O -O -P -------------------
	Local Message$
	TNet_Update()
	
	If KeyHit( KEY_1 ) Message = "Hello"
	If KeyHit( KEY_2 ) Message = "Hi"
	If KeyHit( KEY_3 ) Message = "Greetings"
	If KeyHit( KEY_4 ) Message = "Yo"
		
	' If any Key was hit then send a message to everyone who is connected:	
	If Message Then TNet_Send( CHAT, Message ) 

	'Chat
	TNet_Receive( CHAT ) 'Updates the Global TNetData Variable
	
	DrawText "Last Received: "+TNetData,20,200
	DrawText "Use keys 1-4 to send messages. ",10,20	
	'Draws each Client and their Latency
	TNet_DrawClientList(10,50)
	
	Flip;Cls
Until KeyDown(Key_Escape) 	 ' -------------- -L -O -O -P -------------------

I'm sorry for the lack of comments but I consider it pretty selfexplainatory. Feel free to ask any questions about the example and I will improve it.