Updating OLE objects automatically using MS PowerPoint Add In
About updating OLE objects automatically
One of t he most frequent question s asked by the Aspose.Slides for .NET customers is how to create or change editable charts or any other OLE objects and have them automatically updated when opening the presentation. Unfortunately PowerPoint does not support any automatic macros, which are available in Excel and Word. The only ones available are the Auto_Open and Auto_Close macros. However, those only run automatically from an add-in. This short technical tip shows how to achieve that.
After installing such Add-in, just add Auto_Open() macro (OnPresentationOpen() in case of “Event Generator”) to your template presentation as shown below: