How to fill a ComboBox field in a document

Hi,

I want to fill a ComboBox in a Document in the PostOpen event by a LotusScript or Agent or something… and I don´t know how

I have tried some tests filling it by a Formula or typing some words in the field´s options and when I execute this:

“Document.Combobox(0) Is Nothing”

returns true and the combobox field contains some items!! (You can see them in the list)

How are the combobox items accesed and changed?

It is possible to fill a combobox as I want?

Thanks