↓以下のようなロジックで他PCからホスト名を受け取って、IPアドレス(ipv4)を取得しています。 *-------------------------------------------------------------------------------------* Dim clientInfo As System.Net.IPHostEntry = System.Net.Dns.GetHostEntry("ホスト名") Dim IPAdr As System.Net.IPAddress = Nothing For Each adr As System.Net.IPAddress In clientInfo.AddressList If adr.AddressFamily = AddressFamily.InterNetwork Then IPAdr = adr Exit For End If Next *-------------------------------------------------------------------------------------*