he Excel cells may contain hyperlinks. When the user follows a hyperlink the
Excel fires an event. The OnSheetFollowHyperlink provides the event trapping.
The example code below illustrates the event trapping. The signature of the
ofhHandler is chosen from the information given by the call to the signature()
If the user clicks on the cell a1 then the default web browser displays the
web page and the event handler code activates.