Hello everyone.
I have a small level in VBA. I got a code that I modified following your advice on this forum.
Starting from an assembly, it allows you to export the bill of materials to a sheet .xls
It works perfectly but I would like to add the ability to retrieve the extension of the files in the column: J. 
The variable that allows you to retrieve the extension is as follows: Right(docfilename , 6)
How do I integrate this variable into my program?
Sub main()
Dim xlApp As Excel.Application
Set xlApp = New Excel.Application
Dim wbk As Excel.Workbook
Dim sht As Excel.Worksheet
With xlApp
    . Visible = True
    Set wbk = . Workbooks.Add
    Set sht = wbk. ActiveSheet
End With
Dim swApp                   As SldWorks.SldWorks
Dim swModel                 As SldWorks.ModelDoc2
Dim swModelDocExt           As SldWorks.ModelDocExtension
Dim swBOMAnnotation         As SldWorks.BomTableAnnotation
Dim swBOMFeature            As SldWorks.BomFeature
Dim boolstatus              As Boolean
Dim BomType                 As Long
Dim Configuration           As String
Dim TemplateName            As String
Set swApp = Application.SldWorks
Set swModel = swApp.ActiveDoc
Set swModelDocExt = swModel.Extension
TemplateName = "M:\DATABASE\TEMPLATES\05-Model of nomenclature\GP_ASM_Nomenclature BOS.sldbomtbt"
BomType = swBomType_Indented
Configuration = swApp.GetActiveConfigurationName(swModel.GetPathName)
MsgBox Configuration
Set swBOMAnnotation = swModelDocExt.InsertBomTable3(TemplateName, 0, 0, BomType, Configuration, False, swNumberingType_Detailed, True)
Set swBOMFeature = swBOMAnnotation.BomFeature
swModel.ForceRebuild3 True
Dim NumCol As Long
Dim NumRow As Long
Dim I As Long
Sun J As Long
NumCol = swBOMAnnotation.ColumnCount
NumRow = swBOMAnnotation.RowCount
For I = 0 To NumRow
    For J = 0 TB NumCol
        Sht. Cells(I + 1, J + 1). Value = swBOMAnnotation.Text(I, J)
    Next J
Next I
boolstatus = swModelDocExt.SelectByID2(swBOMFeature.GetFeature.Description, "BOMFEATURE", 0, 0, 0, True, 0, Nothing, 0)
swModel.EditDelete
Dim Path As String
path = "C:\temp\BOS.xlsx"
With xlApp
    wbk. SaveAs path
    wbk. Close
    . Quit
End With
End Sub
