the problem with this syntax
memberSearch = member("RDR").number
if there is no such member it will pop-up a script error. I am pretty sure that Glen wouldn't want the user to see a script error to pop up. Which I think they are very anoying myself.
if you are allowing the user to type in a search you might be able to do something like this which you would place this behaviour on your search button sprite...
if member("your text box member name").text <> EMPTY then
results = checkSearchResults()
sprite(x).member = member(results) -- where "x" is the spriteNum ...