Add a Visual Foxpro linked server

First Download the driver:
http://www.microsoft.com/downloads/en/details.aspx?familyid=e1a87d8f-2d58-491f-a0fa-95a3289c5fd4&displaylang=en

EXEC master.dbo.sp_addlinkedserver

@server = N'FOXPRO1',

@srvproduct=N'Microsoft Visual FoxPro OLE DB Data Provider',

@provider=N'VFPOLEDB',

@datasrc=N'C:\ycsoftware.dbc',

@provstr=N'VFPOLEDB.1'