mschart显示数据请问

mschart显示数据请教。
通过mschart把数据库表中的数据图形化了，
但是想选中这个曲线的某一点，即刻显示数据？

事例：
每5分钟把温度存放到sql数据库中
然后，通过mschart图形化这个温度的曲线
但是，曲线上的数值如何读取显示？

------解决方案--------------------
Private Sub Chart_PointSelected(Series As Integer, DataPoint As Integer, MouseFlags As Integer, Cancel As Integer)
' MsgBox "PointSelected "
Dim i As Integer
Dim Hj As Currency
With Chart
If Che_Lb.Value = 0 Then
.Column = Series
.FootnoteText = .ColumnLabel
.Row = DataPoint
.FootnoteText = .FootnoteText & " " & .RowLabel & " 占所有‘ " & .RowLabel & "’的： "
Else
.Row = DataPoint
.FootnoteText = .RowLabel
.Column = Series
.FootnoteText = .FootnoteText & " " & .ColumnLabel & " 占所有‘ " & .RowLabel & "’的： "
End If

For i = 1 To .ColumnCount
.Column = i
Hj = Hj + .Data
Next i
.Column = Series
If Hj <> 0 Then
.FootnoteText = .FootnoteText & Format$(.Data / Hj * 100, "#.00 ") & "%；数量： " & Format(.Data, "#.00 ")

Else
.FootnoteText = " "
End If
End With
End Sub