Shortcut Category: Shortcuts for PowerPoint
Shortcut Command: Close All Slide Shows

Default Shortcut Key: Ctrl+Q

Description:

PowerPoint allows you to link presentations with one another. When using this feature in a slide show, when you click on a link that links to another presentation, PowerPoint automatically loads the other presentation and starts at the specified slide. When you close this slide show, PowerPoint takes you back to the previous presentation from the point where you left it. Although this is the required behavior for most of the cases, in some cases you may want the entire slide show to terminate when the user closes any slide. Shortcuts for PowerPoint lets you do this.

For calling from macros:

Sub PPShortcuts_CloseAllSlideShows()
    Application.Run "PPShortcuts.ppa!CloseAllSlideShowWindows"
End Sub