Best way to access controls on parent page from a child page popup?

从一个孩子页面弹出访问父页面控件的最佳方式？

The Receive Submission function may represent a legal transfer of custody for the Content Information in the SIP, and may require that special access controls be placed on the contents.

接收提交功能可能代表提交信息包中保管的内容信息的合法转移，这要求对内容加以特殊的访问控制。