InStrRev has the following syntax

InstrRev(stringcheck, stringmatch[, start[, compare]])

According to the Help section, "start" is "Optional. Numeric
expression that sets the starting position for each search. If
omitted, –1 is used, which means that the search begins at the last
character position. If start contains Null, an error occurs."

If I set "start" to -1, the expression evaluates correctly; if I set
start to any other value, the expression evaluates to zero. How can
you use "start" in InStrRev?...TIA, Ron