checkPageTransparencyUsage
Analyze a page for transparency usage.
checkPageTransparencyUsage([in] int page, [out, retval] VARIANT_BOOL *transparency)
The checkPageTransparencyUsage function analyzes the specified page in
the PDF file, and returns true if the page uses transparency, or false
if the page does not use transparency.
VB:
transparency = rast.checkPageTransparencyUsage(page)
If transparency Then
....
Else
....
End If