Full screen slideshow under automation

Context is C# or VB.NET Powerpoint control and enforcing a true fullscreen
mode.

The "fullscreen" kios mode gives a black band and the top & bottom as well
as the task bar. However, when Powerpoint is directly used then the full
screen is a true full screen.
I was interested on how to invoke a true full screen

Thanks

code snippet

pptPresentation.SlideShowSettings.ShowType =
Microsoft.Office.Interop.PowerPoint.PpSlideShowTyp e.ppShowTypeKiosk;
pptPresentation.SlideShowSettings.AdvanceMode =
Microsoft.Office.Interop.PowerPoint.PpSlideShowAdv anceMode.ppSlideShowManualAdvance;
pptPresentation.SlideShowSettings.ShowWithAnimatio n =
MsoTriState.msoTrue;
pptPresentation.SlideShowSettings.StartingSlide = 1;
pptPresentation.SlideShowSettings.EndingSlide =
pptPresentation.Slides.Count;