|Can be called by
|List Box - List Box Column
|A standard sort has just been carried out in a list box column.
This event is generated just after a standard sort is performed (i.e. it is NOT generated if $0 returns -1 in the
On Header Click event). This mechanism is useful for storing the directions of the last sort performed by the user. In this event, the
Self command returns a pointer to the variable of the sorted column header.