To move an opened column, at first the column must be closed
with the method bBrowser:CloseColumn(). Afterwards with the
method bBrowser:OpenColumn() the column must be opened again.
The following code fragment moves the column #LASTNAME at the
position 1:
LOCAL oColumn AS bDataColumn
oColumn := oBrowser:CloseColumn(#LASTNAME, True)
IF !Empty(oColumn)
oBrowser:OpenColumn(oColumn, 1)
ENDIF