Activate Event [Excel 2003 VBA Language Reference]
Occurs when a workbook, worksheet, chart sheet, or embedded chart is activated.
Private Subobject**_Activate()**
objectChart, Workbook, or Worksheet. For information about using events with the Chart object, see Using Events with Embedded Charts.
Remarks
When you switch between two windows showing the same workbook, the WindowActivate event occurs, but the Activate event for the workbook doesn't occur.
This event doesn't occur when you create a new window.
Example
This example sorts the range A1:A10 when the worksheet is activated.
Private Sub Worksheet_Activate()
Range("a1:a10").Sort Key1:=Range("a1"), Order:=xlAscending
End Sub
Applies to | Chart Object | Workbook Object | Worksheet Object