I'm Updating an application that uses UDP on TCP/IP to send messages back and forth.. At the moment i pickup the network address (Subnet = 10.0.0.0 Mask = 255.255.255.0) and send a small "hello" packet to all the ip addresses on the subnet, And reply to any "Hello" packets recived..

But this is a bit of a tedious method.. (255 packets for 1 small subnet.) + i'm looking to try pickup users on a wider scale (Ie. Across multiple subnets).

But i'm not able to send a broadcast (10.0.0.0 or 10.0.0.255) nor am i able to pickup and broadcasts (My server sends them out every so often)

Can anyone help me with this..

Thanks in advance...

Gremmy....