SOlved my own problem:
VB.NET code (sender):
Dim udpClient As New UdpClient
Dim GLOIP As IPAddress
Dim GLOINTPORT As Integer
Dim bytCommand As Byte() = New Byte() {}
GLOIP = IPAddress.Parse("169.254.228.164")
GLOINTPORT = "22368"
udpClient.Connect(GLOIP, GLOINTPORT)
bytCommand = Encoding.ASCII.GetBytes("hello world")
udpClient.Send(bytCommand, bytCommand.Length)
AGK code:
function Checkcomms()
msgID = GetUDPNetworkMessage( 1 )
if ( msgID )
DeleteNetworkMessage( msgID )
lastmsgID = msgID
Message(str(lastmsgID))
endif
endfunction
Dutch