The virtual mode works only for the rows. For columns the virtual mode is not supported. The virtual mode in the grid control is supposed to be used for records in databases where the number of rows may be very large and the number of database fields is limited. Actually if the grid has more than 100 columns the performance will decrease.
I think it would be a useful feature to make the gird a truly virtual grid. At the moment the column limitation causes us a lot of problems so we will stick to our own virtual grid, thank you for the reply.