Visual Basic 6.0 Requires Chilkat v11.0.0+

Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for an Azure Registered App using the Client Credentials Grant Flow.

Note: Your Azure app must be registered as a single-tenant app to use client credentials.

Visual Basic 6.0

Dim success As Long
success = 0

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

Dim http As New ChilkatHttp

Dim req As New ChilkatHttpRequest
req.AddParam "client_secret","CLIENT_SECRET"
req.AddParam "client_id","CLIENT_ID"

'  See Understanding Scopes in Azure OAuth2 Client Credentials Flow
req.AddParam "scope","https://graph.microsoft.com/.default"

req.AddParam "grant_type","client_credentials"

'  Note: Your Azure app must be registered as a single-tenant app to use client credentials.
'  Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
Dim url As String
url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As New ChilkatHttpResponse
success = http.HttpReq(url,req,resp)
If (success = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim statusCode As Long
statusCode = resp.StatusCode
Debug.Print "Response status code = " & statusCode

Dim json As New ChilkatJsonObject
success = json.Load(resp.BodyStr)

json.EmitCompact = 0
Debug.Print json.Emit()

'  Sample successful output:

'  {
'    "token_type": "Bearer",
'    "expires_in": 3599,
'    "ext_expires_in": 3599,
'    "access_token": "eyJ0eX...K0jOERg"
'  }

If (statusCode = 200) Then
    success = json.WriteFile("qa_data/tokens/azureClientCredentialsToken.json")
    Debug.Print "Success."
Else
    Debug.Print "Failed."
End If