Auto Macros (PowerPoint VBA reference)

By giving a macro a special name, you can run it automatically when you perform an operation such as starting PowerPoint. PowerPoint recognizes the following names as automatic macros, or "auto" macros.

Macro name	Run conditions
Auto_Open	Runs when PowerPoint is started or it has loaded the add-in
Auto_Close	Runs when you exit PowerPoint or unloads the add-in

PowerPoint auto macros behavior

The behavior of auto macros Auto_Open and Auto_Close are different from a similar macros AutoOpen and AutoClose in Word and Excel.

PowerPoint will run the Auto_Open each time it loads an add-in (*.ppam) with a module containing this macro. It will effectively run when PowerPoint application is started or you add the add-in using the PowerPoint Add-ins dialog.

PowerPoint will run the Auto_Close each time it unloads an add-in with a module containing this macro. It will effectively run when PowerPoint application is being shutdown or your unload the add-in using the PowerPoint Add-ins dialog.