VBA Programming in CATIA

[Hung Pham Vu]

I have 2 parts in an assembly and I need to subtract one from one. Interactively, I use "Split" command, using the splitting element (a face in the subtracting part). Are there any ways to do it automatically through VBA in CATIA?
I tried using SelectElement2, SelectElement3, SelectElement4 but it didn't work as an error occured repetitively: "Function or interface marked as restricted, or the function uses an Automation type not supported in Visual Basic."