Hi Antony,

yes, you can do that using the code like this:

Dim tree As TreeProvider = Functions.GetTreeProvider
Dim ds As DataSet = tree.SelectNodes("/%", TreePathTypeEnum.AliasPath, "", "", "", -1, True, CType(Functions.GetCurrentDocument.GetValue("NodeID"), Integer), "myrelationship", False)
If ds.Tables(0).Rows.Count > 0 Then
'there is at lease one related document
End If

Should you need any additional details, please feel free to ask.

Best Regards,