You can also deactivate an index from an ABL procedure. Search through the _Index file to find the index you want to deactivate, then set the _Active field equal to NO. The following example uses this technique:
FIND _Index WHERE _Index-Name = "cust-num".
IF (_Index._Active) THEN
_Index._Active = FALSE.
ELSE IF NOT(_Index._Active) THEN
MESSAGE "The specified index is Deactivated.".