Wanted: Exotic databound Datagrid Sample code

[Siegfried Heintze]

Does anyone have some custom databound datagrids source code (that can be
bound to a database table) that will let me:
(1) dynamically hide and expose columns and rows?
(2) display database rows vertically?
(3) allow me to have a variable number of columns (and column headers)
depending on contents of second database table?
(4) Allow me to dynamically change the column header text in response to a
select box?

Thanks,
Siegfried