Powerpoint slideshow in assigned screen location..

I need to show powerpoint slideshows inside my VC++/MFC window. I tried
implementing VB code given in http://skp.mvps.org/vb/pptvbwnd.htm in VC++,
however, even though i set ShowType to '1' (ppshowTypeSpeaker), a slideshow
in full screen is being opened when i call SlideshowSettings.Run(). Its not
allowed by my client. Iam using Office 2007. Is it is possible with
powerpoint viewe?. Is there any way to show slideshow in assigned location on
our own window using PowerPoint Viewer?? Since new powerpoint viewers don't
support automation, i tried using CreateProcess() API to invoke powerpoint
viewer application with various command line arguments. Still it opens slide
show in full screen at first. Please help..