Why in PrintPreviewControl at Zoom In (200% or Higher) Page Right and Bottom Margin Spaces Not Appear?

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VB

Hi to all Friends. first of all Excuse me for my bad english. I created an Address Label Print Program. I use PrintPreviewControl for Preview. When I click my Zoom Button about %100 in zoom is ok. Right Left Right And Bottom Margin Spaces are appear. But when 200% Zoom in PrintDocument is bigger size then PrintPreviewControl window. in this point Left and Top Margin Spaces are appear but Right and Bottom Margin Spaces not display.. can not appear. It seems like endless Paper.. I want to see right and bottom margin spaces also. in this page I found an program source codes.

http://www.codeproject.com/Articles/38758/An-Enhanced-PrintPreviewDialog

In this Program is codes are Locked can not change. I am not professional in VB.Net. thats why I just only want to know is there any simple way to see this right and bottom margin spaces at Zoom In (200%) mode. advanced thank you very much. God Bless all.