A row in a grid needs to be validated BEFORE allowing the user to leave therow without relying on DBC rules (pre-validation is desirable with remote tables and with table buffering) We need properties we can test in
BeforeRowColChange to let us know where the user is trying to go. Remember the VALID clause of a Browse?

BeforeRowColChange should have LPARAMETERS for the new row and column the user is trying to go to. These parameters should retun 0 if the user clicks outside the grid. With that information, we could trigger record validation at the grid level to prevalidate row data when we are using table bufferring.