Does "GetEntityName" work in VB?

I have some difficulties to get the name of new created object via API.
I am using VB (Visual Studio'08) and trying this code:
     Dim SelMgr As Object
     Dim selObj As Object
     Dim myname As String
    
    
SelMgr = swDoc.SelectionManager()
     swDoc.SketchManager.CreateCenterLine(0.02, 0, 0, 0.02, 0.02, 0)
     selObj = SelMgr.GetSelectedObject5(1)
    myname = swDoc.GetEntityName(selObj)
and having empty string. When in debugging mode I am checking object "selObj" I can not see something like "name" property.
Can you please teach me how to fix that?
Regards
Simon
SolidworksApi macros