checking for existing file

[Robert Carroll <robc at total dot net>]

Hi,

Any comments on a preferred method to reliably check whether a file  
already exists (in a given location) would be appreciated.
I am mostly using something like:

for i = 0 to parentfolder.index

if parentfolder.item(i).name= myfilename then
mybool =  true
end if
next

return mybool

thanks

Rob
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