SetPdfAOpenPageLayout 

Sets the selected page layout.   This value specifies how the pages of the printed multipage PDF/A document will be displayed in the PDF viewer.

 SetPdfAOpenPageLayout(pBlackIceDEVMODE As Long, lPageLayout As Long) As Boolean

Input value    - pointer to the BlackIceDEVMODE structure.
                      - one of the following values:

0: The printed PDF will use the PDF viewer’s settings by default.
1:  The PDF viewer application displays only one page at the time on the screen.
2:  The PDF viewer displays the pages in one column.
3: The PDF viewer displays the pages in two column and the odd pages are positioned to the left.
4: The PDF viewer displays the pages in two column and the odd pages are positioned to the right.
5: The PDF viewer application displays two pages next to each other at the time, and the odd pages are positioned to the left.
6: The PDF viewer displays two pages next to each other at the time, and the odd pages are positioned to the right.

NOTE: For 32-bit applications , use pBlackIceDEVMODE as Integer, instead of Long.