How to get the JSONP callbacks function to work

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Visual-Studio

JSONP

Basic

Dear all,

In Visual Basic I have the code that I can get the company details by entering their VATnumber. Now the result I am getting is in 1 big json string. Now I have heard that VATlayer also can work with a JSONP Callbacks, this however, I can't seem to figure out how to put in the code so, I can get each result separated. That I can get for example the company name in a string, that I can use thru out the porgram.

Can anyone please help me with this?

The code I have is;

Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
       Dim URLString = "http://apilayer.net/api/validate&vat_number=GB864438791"
       Try
           'Create the initial request
           Dim Request As HttpWebRequest = HttpWebRequest.Create(URLString)
           Request.Proxy = Nothing 'Speeds up the request by setting the proxy to nothing
           Request.UserAgent = "Test"

           'Create response and reader
           Dim Response As HttpWebResponse = Request.GetResponse
           Dim ResponseStream As System.IO.Stream = Response.GetResponseStream

           'Create a new streamreader
           Dim StreamReader As New System.IO.StreamReader(ResponseStream)
           Dim Data As String = StreamReader.ReadToEnd

           UrlResponseText.Text = Data
           StreamReader.Close()

       Catch ex As Exception
           MsgBox("Improper Input")
           GoURL.Text = Nothing
       End Try

          End Sub

The the result is shown like;

Result from streamreader;
        '{"valid":true,"database":"ok","format_valid":true,"query":"GB864438791","country_code":"GB","vat_number":"864438791","company_name":"EXERTIS (UK) LTD","company_address":"TECHNOLOGY HOUSE\nMAGNESIUM WAY\nHAPTON\nBURNLEY\n\nBB12 7BF"}

An I would like to see that I can assign all the result value to separated strings.

Thanks,
Hans

P.s.

This VAT layer requires a key to enter in the string. So this URL will not work. Like this. But with key you get the below shown result,

What I have tried:

I have search the internet and tried using

New JavaScriptSerializer().Deserialize(Of List(Of Object))(Data)

.