Download a list and past as value. Because vlookup function demands
text format, I need to convert the numbers into strings. If I loop the
list, and convert the cells one by one, it works, but takes a long
time. I am trying to convert the whole range with no luck.

I tried something like
Selection = format (selection,”@”)
Named range =format (named range,”@”)

Even manually select the range-- format cells--Category:Text, still
didn’t work.

I use the function TYPE to monitor the cell's type. After I think I
get the format changed, the TYPE continues to show “1”.

Interestingly enough, after I reformat a cell, if I retyped the
number, it suddenly worked, that is, my vlookup function suddenly
recognized the number as text.

My questions are
(1) Why formatting a cell does not take immediate effect with a
vlookup function or with a type function?
(2) How can I convert the whole range into string?

Thank you in advance.