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 there any way to show slideshow in assigned
location on our own window using PowerPoint Viewer?? If it is possible
with powerpoint viewers, its good. 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... plz help.

-jithu-