AttachLongFilename

KnownPropertyList.AttachLongFilename field

包含附件对象的完整文件名和扩展名。区域：消息附件属性规范名称：PidTagAttachLongFilename 替代名称：PR_ATTACH_LONG_FILENAME、PR_ATTACH_LONG_FILENAME_A、

public static readonly PidTagPropertyDescriptor AttachLongFilename;