>I have 3 grids A,B,C. Record sources are A, B and C and all tables are related one to many (A is master to B, B is master table to C). Question is how to mark current records (differnet color) in tables A and B when I am in grid 3 (table C)? I need visual presentation whic records are selected in master tables A and B. When I select another record in table A or B, coloring should change and affects only to current records in tables.
>Thanks in advance.

In VFP9 you can set highlight to be 2 (with visual persistence).