Dear friend,
use following code for getting property without opening file
Dim servercom As New Inventor.ApprenticeServerComponent
Dim serverDoc As Inventor.ApprenticeServerDocument
serverDoc = servercom.Open("C:\Cylindrical.ipt")
Dim count As Integer = serverDoc.PropertySets.Count
Dim i As Integer = 0
For i = 1 To count
Dim Propset As PropertySet = serverDoc.PropertySets(i)
Next
Regards,
Satyajeet