Syntax: FILEEXISTS(S)
S = a string value
FILEEXISTS returns the value 1 if file S can be opened for reading; otherwise 0.
Examples:
FILEEXISTS(``connections.c'') = 1
FILEEXISTS(``Q1EXPENSES91.XS'') = 1
FILEEXISTS(``Q1EXPENSES90.WKS'') = 0
Excel function: N/A