DnsClient.Async (gb.net)
Property Async As Boolean
Returns or sets the asynchronous mode of the DNS client.
If this property is set to 
TRUE, the DNS client will work in asynchronous mode, so the program will be not be paused while the resolution process is working.
The Status property will take the value 
Net.
Active while working, and the 
Finished event will be raised after the resolution process is finished.