In Visual Basic, you do it like so:
dbMaster.Synchronize ReplicaDBName, dbRepImportChanges
where dbMaster is the master database, ReplicaDBName is the full path name of the replica, and dbRepImportChanges is a predefined constant telling the Master to import changes from the Replica but not to send changes to the Replica.
The same functionality should be available in Access with VB for applications. You'll have to code a macro, and probably assign it to a command button.
Good luck.
Mike