主题：怎样获取本季度的第一天和最后一天

Dim y As Integer = 2011 '指定年份
Dim q As Integer = 2 '指定季度
Dim dt1 As New Date(y, 3 * (q - 1) + 1, 1) '获取该季度的第一天
Dim dt2 As New Date(y, 3 * q, Date.DaysInMonth(y,3 * q)) '获取该季度的最后一天
Dim Filter As String
Filter = "日期 >= #" & dt1 & "# And 日期 <= #" & dt2 & "#"
Tables("订单").Filter = Filter