To make the package load happen at runtime, you need to use require rather than use, and for safety, wrap it in an eval block to check errors. The basic approach is 
  if ( $Format eq "MSWin32" ) {
      eval { require Win32::DriveInfo };
      if ( $@ ) {
          # handle error
      }

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In reply to Re: use package by dws
in thread use package by jhgrizz

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