LAPI, Categories and Attributes

Richard_Ma_(mtrcadmin_-_(deleted))

We have a VB program which does uploading files to livelink. We are now going to enhance it in the following way:- let user choose a Category from WS- read a text file which contains columns and rows. They will match each file's attributes.I have done the following parts:- upload file- apply cateogry to a filewhat I can't solve is:How to set attributes of a Cateogry and apply it to a document/Object?Thank you very much