定义的介面会公开表单区域的事件使用的方法。
Defines an interface that exposes methods that are used by the events of the form region.
取得或设定值，指出是否要在[读取窗格]中显示表单区域。
Gets or sets a value that indicates whether Outlook loads legacy forms before loading this form region.
确保您在注册表中指定的名称与外接程序中定义的任何表单区域的名称不匹配。
Ensure that the name that you specify in the registry must not match the name of any form regions defined in the add-in.
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