As far as I know, there are three constants for controlling cell selection
in MS FlexGrid:  flexSelectionByRow, flexSelectionByColumn, and
flexSelectionFree.

Since I want my users to be able to select by individual cell, I set the
SelectionMode property to flexSelectionFree.  Unfortunately, this allows
users to select multiple cells instead of just one at a time.  Is there a
way to restrict this possible using mousemove events?

Thanks