XPhexLStrip()
  Strip all Low ASCII characters from a String
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  Function:    XPhexLStrip()

  Syntax:      XPhexLStrip(cString) --> cLStrippedString

  Arguments:   <cString> is any string. The result is a String
               where all ASCII chacacters under 32 excluded have been
               replaced by dots ('.').

  Returns:     See arguments.

  Usage:       XPhexLStrip("AB") --> "AB"
               XPhexStrip(chr(254)+'Pepijn'+chr(0)+chr(1)) --> ".Pepijn.."