OnActivateTab

The OnActivateTab event can be implemented by a script add-in to receive a notification every time a tab becomes active (i.e. comes to the front of another tab in the same file display).

Method Name:	OnActivateTab
Argument Type:	ActivateTabData
Return Type:	none
Description:	The ActivateTabData.oldtab property identifies the tab that was previously active, and the newtab property identifies the new active tab.