Commented Unassigned: Cannot get HWND of a PowerPoint SlideShow window [21837]

Hi,

I migrated my WPF app from PIA v14 to NetOffice. I have problem with getting HWND (window handle) from PowerPoint. It was working on PIA v14, but when I try to access to __ppPresentation.SlideShowWindow.HWND__ property (ppPresentation is my PowerPoint presentation opened as SlideShow) with NetOffice, exception __"Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND))"__ is thrown. How I can get handle to SlideShow window using NetOffice? Other functiomns works ok.
Comments: ** Comment from web user: SebastianDotNet **

once again :(

[Guid("91493453-5A91-11CF-8700-00AA0060263B"), TypeLibType(4288), ComImport]
public interface VSlideShowWindow
{
[DispId(2010)]
int HWND
{
[DispId(2010), TypeLibFunc(1)]
[MethodImpl(4096)]
get;
}
}