There is not an easy way to create new notesdocumentcollection. The notesdocumentcollection is handy for doing stampall, which is very quick way of updating one field on a collection without having to load all of the documents one by one into memory.

The way I create an empty notesdocumentcollection is to do:

dim col as notesdocumentcollection

dim tempdoc as new notesdocument(db)

set col = tempdoc.responses

You can then do

call col.addDocument(doc)

col.clone

call col.stampall("Checked",now)

etc