C:\test>dumpbin /imports \perl64\lib\auto\IO\IO.dll
Microsoft (R) COFF/PE Dumper Version 7.00.9466
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file \perl64\lib\auto\IO\IO.dll

File Type: DLL

  Section contains the following imports:

    perl510.dll
...
                         42E Perl_sv_newmortal
                         21C Perl_croak_xs_usage
                          8F PerlIO_tmpfile
...