well,

it is not working. here is would i did. 
my $func =
  import_api_ex( 'advapi32',
    'DWORD QueryUsersOnEncryptedFile(LPCWSTR lpFileName, LPVOID pUsers
+)' )
  ;    # LPVOID* is not known
die "Could not import API QueryUsersOnEncryptedFile: $!" unless define
+d $func;

my $encCertHashList =
  Win32::API::Struct->new('ENCRYPTION_CERTIFICATE_HASH_LIST');
$func->Call( make_unicode( File::Spec->canonpath($filename) ),
    $encCertHashList );

print $encCertHashList->
  {nCert_Hash}; # i get: Can't use string ("ÈÖƒ?") as a HASH ref while
+ "strict refs" in use

$encCertHashList = Win32::API::Struct->new('ENCRYPTION_CERTIFICATE_HAS
+H_LIST');
$func->Call( make_unicode( File::Spec->canonpath($filename) ),
    \$encCertHashList );

print $encCertHashList->
  {nCert_Hash};    # i get: Use of uninitialized value in print

[download]
i tried both variants without the make_unicode call <- made no differences!

In reply to Re^2: Win32::API::Struct: Pointers of Pointers by esskar
in thread Win32::API::Struct: Pointers of Pointers by esskar

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