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struct ReclsSearch
  -> class ReclsFileSearch (single defn; UNIX and Win32 impls)
  -> class ReclsFtpSearch (Win32 only)
class ReclsFileSearchDirectoryNode (UNIX defn and impl)
class ReclsFileSearchDirectoryNode (Win32 defn and impl)
class ReclsFtpSearchDirectoryNode (Win32 only)