chr or mid or left or... are functions that take variants as arguments.
Variants are inefficient as the function first needs to determine what kind
of varaible it is. By using the dollar sign you are telling the function that
you are passing in a string. This makes the functions more efficient. The
down side is that if you pass in somthing other than a string the function
will bomb...
I was unaware of the difference so I read further. I think you got it mixed
up. The args are not variants; the returned values are Variant (no $) or
String ($)
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