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Wolfgang Orth had a webgem on easing permissions for files used across the network using Internet Explorer, but I missed part of that. Perhaps someone can fill this in.
INRANGE
Some discussion of the Inrange function.
STATUS
Greg Bailey brought up the STATUS function, which among other things can be used to get the open mode of files (or whether the file is open at all). Mark Goldberg pointed out that there is a BadWindow equate but it's not clear when this might come into play. The online help has the following code in no particular context:
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