public unsafe static extern WindowsError RemoveUsersFromEncryptedFile( string lpFileName, ENCRYPTION_CERTIFICATE_HASH_LIST *pHashes);
public unsafe static extern void FreeEncryptionCertificateHashList( ENCRYPTION_CERTIFICATE_HASH_LIST *pUsers);
public unsafe static extern WindowsError RemoveUsersFromEncryptedFile( string lpFileName, ENCRYPTION_CERTIFICATE_HASH_LIST *pHashes);
public unsafe static extern void FreeEncryptionCertificateHashList( ENCRYPTION_CERTIFICATE_HASH_LIST *pUsers);