Get the part number of a part inserted into a SLDDRW

Can anybody help??

I have the following macro....

    Set swApp = Application.SldWorks

    Dim oDoc As SldWorks.ModelDoc2
   
    Set oDoc = swApp.ActiveDoc
   
    If oDoc.GetType = 3 Then
       PartNumber = ??????

    End If

If checks to see if the open document is a "SLDDRW" file.  (this part works OK)

What I need, is to know the part number of the "SLDPRT" that has been inserted into the "SLDDRW" drawing (Bold Text), not a "SLDASM" file.

Is this possible????

Many thanks in advance!!!

Darren  

SolidworksApi macros