table control problem

how can i modify/update a particular row in the table control when all the rows of the cotrol are locked. Just want to update only one record which also needs to be unlocked ( with input =1).

how to trap the selected row property.

how to insert into control when all the columns are locked. only the NEW row to be inserted must be unloacked. when save button is pressed, it should be saved to the REFERENCE table.