I need to keep an slide hide from the normal presentation, and shows
it when I click a Textbox. So, I added a PowerPoint presentation as an
object and I created a simple one line macro, to show the external
presentation during a slide show:

Sub ShowAddedSlide()
ActivePresentation.Slides(4).Shapes(1).OLEFormat.DoVerb 1
End Sub

Then, I put the macro name at the Action Settings option of the
Textbox. If I run the macro from the IDE it runs ok, but if I try to
click the Textbox during the slide show, nothing happens. Can you see
what is wrong in my code?

Thanks