Dim olApp As Outlook.Application
Set olApp = Outlook.Application
Set calendarItems = olApp.Session.GetDefaultFolder(olFolderCalendar).Items
'文档说首先对集合进行排序，然后设置包括重复项
'https://learn.microsoft.com/en-us/office/vba/api/outlook.items.includerecurrences
calendarItems.Sort "[Start]"
calendarItems.IncludeRecurrences = True
'用于restrict的筛选条件：[Start] < "明天" 并且 [Start] >= "今天"
criteria = "[Start] < " & Chr(34) & VBA.Format(Now + 1, "Short Date") & Chr(34) & " and [Start] >= " & Chr(34) & VBA.Format(Now, "Short Date") & Chr(34)
Set todayAppointments = calendarItems.Restrict(criteria)
'用于调试的打印信息
For Each Item In todayAppointments
    Debug.Print (Item.Subject & " " & Item.ConversationTopic & " " & Item.Organizer & " " & Item.Start & " " & Item.End)
Next

Option Explicit ' 将此视为强制性的
' 工具 | 选项 | 编辑器选项卡
' 要求变量声明
' 如果非常需要，请声明为Variant
Private Sub ApptToday()
Dim calendarItems As Items
Dim todayAppointments As Items
Dim item As Object
Set calendarItems = Session.GetDefaultFolder(olFolderCalendar).Items
' 文档建议首先对集合进行排序，然后设置包括重复项
' https://learn.microsoft.com/en-us/office/vba/api/outlook.items.includerecurrences
calendarItems.Sort "[Start]"
calendarItems.IncludeRecurrences = True
Dim criteria1 As String
criteria1 = "[Start] < " & Chr(34) & VBA.Format(Now + 1, "Short Date") & Chr(34) & " AND [Start] >= " & Chr(34) & VBA.Format(Now, "Short Date") & Chr(34)
Debug.Print
Debug.Print criteria1
Set todayAppointments = calendarItems.Restrict(criteria1)
' 用于调试的打印信息
For Each item In todayAppointments
    If item.Class = olAppointment Then
        Debug.Print (item.subject & " " & item.ConversationTopic & " " & item.Organizer & " " & item.Start & " " & item.End)
    End If
Next
Dim criteria2 As String
criteria2 = "[Start] < " & Chr(34) & VBA.Format(Now + 1, "Short Date") & " 00:00" & Chr(34) & " AND [Start] >= " & Chr(34) & VBA.Format(Now, "Short Date") & " 00:00" & Chr(34)
Debug.Print
Debug.Print criteria2
Set todayAppointments = calendarItems.Restrict(criteria2)
' 用于调试的打印信息
For Each item In todayAppointments
    If item.Class = olAppointment Then
        Debug.Print (item.subject & " " & item.ConversationTopic & " " & item.Organizer & " " & item.Start & " " & item.End)
    End If
Next
Dim criteria3 As String
criteria3 = "[Start] < " & Chr(34) & VBA.Format(Date + 1, "yyyy-mm-dd hh:nn") & Chr(34) & " AND [Start] >= " & Chr(34) & VBA.Format(Date, "yyyy-mm-dd hh:nn") & Chr(34)
Debug.Print
Debug.Print criteria3
Set todayAppointments = calendarItems.Restrict(criteria3)
' 用于调试的打印信息
For Each item In todayAppointments
    If item.Class = olAppointment Then
        Debug.Print (item.subject & " " & item.ConversationTopic & " " & item.Organizer & " " & item.Start & " " & item.End)
    End If
Next
End Sub

calendarItems.Sort "[Start]"```
尽管日期和时间通常以日期格式存储，但使用 Jet 和 DAV Searching and Locating (DASL) 语法的筛选器要求将日期时间值转换为字符串表示。在 Jet 语法中，日期时间比较字符串应该用双引号或单引号括起来。在 DASL 语法中，日期时间比较字符串应该用单引号括起来。
为确保日期时间比较字符串格式与 Microsoft Outlook 期望的格式一致，使用 Visual Basic for Applications 的 `Format` 函数。以下示例创建了一个 Jet 筛选器，以查找在2022年6月12日下午3:30之前修改的所有项目，本地时间。
```criteria = "[LastModificationTime] < '&#" & Format("6/12/2022 3:30PM","General Date") & "#'"```
在我为技术博客写的文章中了解更多信息：
- [如何在 Outlook 中使用 Restrict 方法获取日历项][1]
- [如何使用 Find 和 FindNext 方法检索 Outlook 日历项][2]
  [1]: https://www.add-in-express.com/creating-addins-blog/2011/11/15/outlook-restrict-calendar-items/
  [2]: https://www.add-in-express.com/creating-addins-blog/2011/11/11/outlook-retrieve-calendar-items/
<details>
<summary>英文:</summary>
You need to set properties in the reverse order. Instead of sorting the collection first you need to include recurrences first of all:

Although dates and times are typically stored with a date format, filters using the Jet and DAV Searching and Locating (DASL) syntax require that the date-time value to be converted to a string representation. In Jet syntax, the date-time comparison string should be enclosed in either double quotes or single quotes. In DASL syntax, the date-time comparison string should be enclosed in single quotes.
To make sure that the date-time comparison string is formatted as Microsoft Outlook expects, use the Visual Basic for Applications `Format` function. The following example creates a Jet filter to find all items that have been modified before June 12, 2022 at 3:30 P.M local time.

Read more about that in the articles that I wrote for the technical blog:
 - [How To: Use Restrict method in Outlook to get calendar items][1]
 - [How To: Retrieve Outlook calendar items using Find and FindNext methods][2]
  [1]: https://www.add-in-express.com/creating-addins-blog/2011/11/15/outlook-restrict-calendar-items/
  [2]: https://www.add-in-express.com/creating-addins-blog/2011/11/11/outlook-retrieve-calendar-items/
</details>