PartFeatureExtent object returns direction of its extrude feature.
Try this VBA code:
Sub ExtrusionDir()
Dim oDoc As PartDocument
Set oDoc = ThisApplication.ActiveDocument
Dim oDef As PartComponentDefinition
Set oDef = oDoc.ComponentDefinition
Dim oExtrFeatures As ExtrudeFeatures
Set oExtrFeatures = oDef.Features.ExtrudeFeatures
Dim oExtrFeature As ExtrudeFeature
Set oExtrFeature = oExtrFeatures.Item(1)
Dim oExtrDef As ExtrudeDefinition
Set oExtrDef = oExtrFeature.Definition
Dim oExtent As PartFeatureExtent
Set oExtent = oExtrDef.Extent
Dim oDir As PartFeatureExtentDirectionEnum
oDir = oExtent.Direction
' PartFeatureExtentDirectionEnum:
'kNegativeExtentDirection = 20994
'kPositiveExtentDirection = 20993
'kSymmetricExtentDirection = 20995
End Sub
Vladimir Ananyev
Developer Technical Services
Autodesk Developer Network