Currently our company is using different versions of access and I was just given an application to work on that utilizes the ms access 8.0 office object library. The app is a visual studio.net C# application. I have office XP installed on my machine and although a reference to excel holds up when i open the program, the access reference is missing. I have version 10 of the office dll. I know that the libraries have something to do with the msacc8.olb file has something to do with the version 8 library, but I'm not sure how to register or move it to my machine to eliminate the problem. Does anyone have any ideas on how i could use both libraries concurrently? Thanks.