A paper that I've read talks about using mixed=yes with the Excel
libname engine. It then talks about setting the MS Jet TypeGuessRows
key in the Windows registry to 0 so that the whole column will be looked
at to determine the field type (as opposed to the first 8 rows.)
So, as I don't want to be running around checking (and re-checking)
everyone's Windows registry, is there a way to (safely) change this key
in SAS code?