SelText, SelLength, SelStart in DBGrid?

When editing a field in DBGrid at run-time, how does one control the
highlighted text and cursor position? Its simple in DBEdit and other
controls. One uses SelStart, SelLength and SelText.

Apparently, a DBGrid is just a set of DBEdits in a table. How does one
access these important properties here?  How else might one cut
highlighed text to the clipboard while editing a field in DBGrid?

Emails appreciated. I will reply.

Matthew