To run the sample, you need to have a part document open, and the spreadsheet C:\Temp\params.xls must exist. You can also edit the sample to reference another spreadsheet if you prefer. The spreadsheet should contain valid definitions for parameters. For the section of the code that demonstrates changing the reference you also need to create a spreadsheet C:\Temp\newparams.xls, or edit the sample to reference another spreadsheet.
Public Sub TableParameters()
Dim oPartDoc As Inventor.PartDocument
' Obtain the active document, this assumes that
' a part document is active in Inventor
Set oPartDoc = ThisApplication.ActiveDocument
'Obtain the Parameters collection
Dim oParams As Parameters
Set oParams = oPartDoc.ComponentDefinition.Parameters
' Add a parameter table using an existing spreadsheet.
oParams.ParameterTables.AddExcelTable "C:\Temp\params.xls", "A1", True
' Accessing a parameters in a linked/embedded file
Dim oParamTableFiles As ParameterTables
Set oParamTableFiles = oParams.ParameterTables
' Traverse through the collection of linked files
Dim oParamTableFile As ParameterTable
For Each oParamTableFile In oParamTableFiles
' Change the linked file to another file
If LCase(oParamTableFile.FileName) = "C:\temp\params.xls" Then
oParamTableFile.FileName = "C:\Temp\newparams.xls"
End If
' Get the Parameters collection from the file
Dim oTableParams As TableParameters
Set oTableParams = oParamTableFile.TableParameters
' Traverse through the table parameters collection and display them
Dim iNumTableParams As Long
Debug.Print "TABLE PARAMETER VALUES"
For iNumTableParams = 1 To oTableParams.Count
' Display the name
Debug.Print " Name: " & oTableParams.Item(iNumTableParams).Name
' Display the expression
Debug.Print " Expression: " & oTableParams.Item(iNumTableParams).Expression
' Display the value. This will be in database units.
Debug.Print " Value: " & oTableParams.Item(iNumTableParams).Value
Next iNumTableParams
Next
End Sub