'// Create a Skype4COM object:
Set oSkype = WScript.CreateObject("Skype4COM.Skype", "Skype_")

'// Start the Skype client:
If Not oSkype.Client.IsRunning Then oSkype.Client.Start() End If

'// Connect to the Skype API with protocol version 5 (the default version):
oSkype.Attach 5

'// When attached to the API, send repeated commands to the API to test if they succeed:
Do While True 
  WScript.Sleep(1000)
  If oSkype.AttachmentStatus = oSkype.Convert.TextToAttachmentStatus("SUCCESS") Then 
    WScript.StdOut.Write "PING.."
    oSkype.SendCommand(oSkype.Command(0, "PING","PONG",TRUE))
   'oSkype.SendCommand(oSkype.Command(0, "PING")) 
    WScript.StdOut.Write "ok"
    WScript.Echo ""
  End If
Loop
 
'// The AttachmentStatus event handler monitors attachment status and returns the Skypename of the user when the status is "success":
Public Sub Skype_AttachmentStatus(ByVal aStatus)
 WScript.Echo ">Attachment status " & oSkype.Convert.AttachmentStatusToText(aStatus)
 If aStatus = oSkype.Convert.TextToAttachmentStatus("AVAILABLE") Then oSkype.Attach() End If
 If aStatus = oSkype.Convert.TextToAttachmentStatus("SUCCESS") Then WScript.Echo "Current user is " & oSkype.CurrentUserHandle End If  
End Sub