Microsoft Office

Part VI
Programming Excel with VBA
In addition, every event-handler procedure has a predetermined name. You can declare the procedure by
typing it, but a much better approach is to let the VB Editor do it for you. Figure 43.1 shows the code module
for the ThisWorkbook object. To insert a procedure declaration, select Workbook from the objects list
on the left. Then select the event from the procedures list on the right. When you do, you get a procedure
“shell” that contains the procedure declaration line and an End Sub statement.
FIGURE 43.1
The best way to create an event procedure is to let the VBE do it for you.
For example, if you select Workbook from the objects list and Open from the procedures list, the VB Editor
inserts the following (empty) procedure:
Private Sub Workbook_Open()
End Sub
Your event-handler VBA code goes between these two lines.
Some event-handler procedures contain an argument list. For example, you may need to create an eventhandler
procedure to monitor the SheetActivate event for a workbook. If you use the technique
described in the previous section, the VB Editor creates the following procedure:
Private Sub Workbook_SheetActivate(ByVal Sh As Object)
End Sub
This procedure uses one argument (Sh), which represents the activated sheet. In this case, Sh is declared as
an Object data type rather than a Worksheet data type because the activated sheet also can be a chart
sheet.
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