Okay, bear in mind that this is mostly conceptual. You can choose to implement this in your classes.

1 - Open view in form's data environment and set NoDataOnLoad to .T.

or

in Form.Load
use yourview nodata

2 - in Form.Load

select yourview
index on tag
index on tag

3 - in grid.column1.header1

set order to tag
THIS.PARENT.PARENT.REFRESH()

in grid.column2.header2

set order to tag
THIS.PARENT.PARENT.REFRESH()

HTH