Hi there,I hope i have understood ur problem .
What i suggest is u fill the flexgrid with the data but start filling from 2ndcolumn and leave the first column blank.
Now after u have filled the data.U set the Font of first col. to 'Marlett' and on click or space bar press set the content of first column to 'a'or 'A' this will give u a look of checkmark.

Or as a second option u can use listview it has a functionality of check box and also allows u to get the value of individual columns.

Hope it helps.