how to cancel the selection of one of the face after i selcet some faces via api

hi,everybody!

now i want to cancel the selection of one of the face after a i select some faces, i do not know how to do it via api.

as you know ,if i choose a face, the api"select4" will be ok. then how to cancel the selection of a face via api and the other faces is still selected?

any idea is welcome! thank you!

SolidworksApi macros