ODBC uses a common API which the odbc driver implements for the different DBMSs.
As long as you use the Merant Sybase odbc driver (3.11 or above preferably), you
should be able to access or link tables just as MSSQL. If you use the
passthrough mode (not sure of VisualFoxpro supports), then it might vary if you
are using some DBMS specific command such as cursors, CASE stmt etc..