VB.NET Requires Chilkat v11.0.0+
QuickBooks - Query an Account

Demonstrates how to query the QuickBooks chart of accounts.
Chilkat VB.NET Downloads

VB.NET
Dim success As Boolean = False

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Get our previously obtained OAuth2 access token, which should contain JSON like this:
'  {
'    "expires_in": 3600,
'    "x_refresh_token_expires_in": 8726400,
'    "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
'    "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
'    "token_type": "bearer"
'  }

Dim jsonToken As New Chilkat.JsonObject
success = jsonToken.LoadFile("qa_data/tokens/qb-access-token.json")

Dim rest As New Chilkat.Rest

'  Connect using TLS.
'  A single REST object, once connected, can be used for many Quickbooks REST API calls.
'  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
'  then it will be automatically re-established as needed.
Dim bAutoReconnect As Boolean = True
success = rest.Connect("sandbox-quickbooks.api.intuit.com",443,True,bAutoReconnect)
If (success = False) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim sbAuth As New Chilkat.StringBuilder
sbAuth.Append("Bearer ")
sbAuth.Append(jsonToken.StringOf("access_token"))
rest.Authorization = sbAuth.GetAsString()

rest.AddHeader("Accept","application/json")
rest.AllowHeaderFolding = False

'  Add a SELECT statement 
rest.AddQueryParam("query","select * from Account where Metadata.CreateTime > '2014-12-31'")
rest.AddQueryParam("minorversion","45")

'  The company ID is 123146096291789
Dim responseBody As String = rest.FullRequestNoBody("GET","/v3/company/123146096291789/query")
If (rest.LastMethodSuccess = False) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


rest.ClearAllQueryParams()

'  We should expect a 200 response if successful.
If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine("Request Header: ")
    Debug.WriteLine(rest.LastRequestHeader)
    Debug.WriteLine("----")
    Debug.WriteLine("Response StatusCode = " & rest.ResponseStatusCode)
    Debug.WriteLine("Response StatusLine: " & rest.ResponseStatusText)
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(rest.ResponseHeader)
    Debug.WriteLine(responseBody)
    Exit Sub
End If


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

'  Load the JSON response into a JSON object for parsing.
'  A sample JSON response is shown below.
Dim json As New Chilkat.JsonObject
json.Load(responseBody)

'  These will be used for parsing date/time strings..
Dim dtime As New Chilkat.CkDateTime
Dim bLocalTime As Boolean = True
Dim dt As New Chilkat.DtObj

'  Iterate over each account returned.
Dim numAccounts As Integer = json.SizeOfArray("QueryResponse.Account")
Dim i As Integer = 0
While i < numAccounts

    json.I = i
    Debug.WriteLine("Name: " & json.StringOf("QueryResponse.Account[i].Name"))
    Debug.WriteLine("Id: " & json.StringOf("QueryResponse.Account[i].Id"))

    '  Load the CreateTime into a CkDateTime...
    dtime.SetFromTimestamp(json.StringOf("QueryResponse.Account[i].MetaData.CreateTime"))
    dtime.ToDtObj(bLocalTime,dt)

    Debug.WriteLine(dt.Month & "/" & dt.Day & "/" & dt.Year & "  " & dt.Hour & ":" & dt.Minute)

    Debug.WriteLine("----")
    i = i + 1
End While

Debug.WriteLine("Success.")

'  ------------------------------------------------------
'  The JSON response looks like this:

'  {
'    "QueryResponse": {
'      "Account": [
'        {
'          "Name": "Accounts Payable (A/P)",
'          "SubAccount": false,
'          "FullyQualifiedName": "Accounts Payable (A/P)",
'          "Active": true,
'          "Classification": "Liability",
'          "AccountType": "Accounts Payable",
'          "AccountSubType": "AccountsPayable",
'          "CurrentBalance": -1602.67,
'          "CurrentBalanceWithSubAccounts": -1602.67,
'          "CurrencyRef": {
'            "value": "USD",
'            "name": "United States Dollar"
'          },
'          "domain": "QBO",
'          "sparse": false,
'          "Id": "33",
'          "SyncToken": "0",
'          "MetaData": {
'            "CreateTime": "2016-09-10T10:12:02-07:00",
'            "LastUpdatedTime": "2016-09-17T13:10:36-07:00"
'          }
'        },
'        {
'          "Name": "Accounts Receivable (A/R)",
'          "SubAccount": false,
'          "FullyQualifiedName": "Accounts Receivable (A/R)",
'          "Active": true,
'          "Classification": "Asset",
'          "AccountType": "Accounts Receivable",
'          "AccountSubType": "AccountsReceivable",
'          "CurrentBalance": 5281.52,
'          "CurrentBalanceWithSubAccounts": 5281.52,
'          "CurrencyRef": {
'            "value": "USD",
'            "name": "United States Dollar"
'          },
'          "domain": "QBO",
'          "sparse": false,
'          "Id": "84",
'          "SyncToken": "0",
'          "MetaData": {
'            "CreateTime": "2016-09-14T14:49:29-07:00",
'            "LastUpdatedTime": "2016-09-17T13:16:17-07:00"
'          }
'        },
'        {
'          "Name": "Advertising",
'          "SubAccount": false,
'          "FullyQualifiedName": "Advertising",
'          "Active": true,
'          "Classification": "Expense",
'          "AccountType": "Expense",
'          "AccountSubType": "AdvertisingPromotional",
'          "CurrentBalance": 0,
'          "CurrentBalanceWithSubAccounts": 0,
'          "CurrencyRef": {
'            "value": "USD",
'            "name": "United States Dollar"
'          },
'          "domain": "QBO",
'          "sparse": false,
'          "Id": "7",
'          "SyncToken": "0",
'          "MetaData": {
'            "CreateTime": "2016-09-09T14:42:07-07:00",
'            "LastUpdatedTime": "2016-09-09T14:42:07-07:00"
'          }
'        },
'  ...
'    "time": "2016-10-24T15:35:25.067-07:00"
'  }