title: combobox contain subfolder never created or seen
body: <p>i have a textbox (name_f) and combobox (name_sf) , i want when the user types the folder name, automatically the list of sub-folders appears in the combobox . But , my problem is : the combobox contains subfolders never seen or created,</p>
  
  <p>can someone help me?</p>
  
  <p>my code is in vb.net and i use google drive api </p>
  
  <p>this is my code (i call this code in another method)</p>
  
  <pre><code>Public Function lists(folder As String) As List(Of String)
   Dim liste As New List(Of String)
          ' declaration d un tableau ou liste de string lst
          Dim lister = Service.Files.List()
          lister.Q = "mimeType = 'application/vnd.google-apps.folder'"
          Dim exec = lister.Execute()
          For Each parcour In exec.Items
              If (parcour.Title = folder) Then
                  Dim lister_s = Service.Files.List()
                  lister_s.Q = "mimeType = 'application/vnd.google-apps.folder '"
                  Dim result = lister_s.Execute()
                  For Each parcour_s In result.Items
                      liste.Add(parcour_s.Title)
                  Next
              End If
          Next
          Return liste
  End Function 
  </code></pre>