EasyUDPSocket.Register
From Xojo Documentation
Method
Registers GroupName as an identifier for messages sent by SendMessageToGroup.
Notes
GroupName can be any string, which will be mapped it to a valid Class D IP address. Class D IP addresses are in the range: [224.0.0.0 to 239.255.255.255]. For example, you can call Register("My Cool App"), and it will be hashed to a valid Class D IP address. However, if you use a valid Class D IP address, it will use that without modifications.
Before calling Register, please set the port and call Connect.
Example
This example registers the user as a group member and updates the list. Everyone on the network who wants to join the group needs to use the same group name:
AutoDiscovery1.Register("MyGroup")
AutoDiscovery1.UpdateMemberList
AutoDiscovery1.UpdateMemberList