This value specifies the custom zoom value what used in the viewer application when the output PDF/A document is opened. The custom zoom used only if the Magnification mode is set to custom (4) (The selected Magnification mode can be returned by the GetPdfAOpenMagnification function).
GetPdfAOpenZoom (pBlackIceDEVMODE As Long) As Long
Input value - pointer to the BlackIceDEVMODE structure.
Return value – the custom zoom percentage
NOTE: For 32-bit applications , use pBlackIceDEVMODE as Integer, instead of Long.