Visual Basic 6.0

Resolve Domain to IP Address

See more DNS Examples

Demonstrates how to perform a DNS query to obtain A records for resolving a domain name to an IPv4 address. Visual Basic 6.0

Dim success As Long
success = 0

Dim dns As New ChilkatDns

Dim json As New ChilkatJsonObject
json.EmitCompact = 0

success = dns.Query("A","microsoft.com",json)
If (success = 0) Then
    Debug.Print dns.LastErrorText
    Exit Sub
End If

Debug.Print json.Emit()

' Sample response.
' Parsing code below..

' {
'   "answer": {
'     "a": [
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.112.250.133"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.231.239.246"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.76.201.171"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.70.246.20"
'       },
'       {
'         "name": "microsoft.com",
'         "ttl": 1528,
'         "ipv4": "20.236.44.162"
'       }
'     ]
'   }
' }

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

Dim name As String
Dim ttl As Long
Dim ipv4 As String

Dim i As Long
i = 0
Dim count_i As Long
count_i = json.SizeOfArray("answer.a")
Do While i < count_i
    json.I = i
    name = json.StringOf("answer.a[i].name")
    ttl = json.IntOf("answer.a[i].ttl")
    ipv4 = json.StringOf("answer.a[i].ipv4")
    i = i + 1
Loop