how to set document size 11 17 and 8 5 11 to export as PDF with macro

SF 2007-06-19

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Hi I would like to set up with a macro my document papersizebefore export it to pdf;
i try to use the function :

PageSetup.PrinterPaperLength
and
PageSetup.PrinterPaperWidth

but i don't know how to use them

can you help me ?

thanks in advance

AlexSolidworks Api macros