Setting a layout via DXF input

[Anonymous]

I write software which exports *.dxf files to be imported into AutoCad.

I have a page in paper space that is letter size.  When imported into AutoCad it shows the page in landscape view.  If I manually change to portrait view every thing is okay.

I had an AutoCad user set up a file in portrait view and export the *.dxf.  It read into DwgTrueView correctly.  I traced the information of the portrait view to the LAYOUT object.  Simply copying that object into my prior *.dxf file picks up the information but still displays the page in landscape.

There is obviously some "boiler plate" that I am omitting, but to guess in 200K of text is not practical.  What am I missing?  Thanks.

[dmfrazier]

How is "letter size" defined?

Not sure if this will help or not (and I might be getting in "over my head"), but note that there are two things which effect the "orientation" of the print/plot: one is the page size/description (e.g. 11 x 8.5 vs. 8.5 x 11) and the other is the drawing orientation itself.  There is an interplay between paper size and drawing orientation. So, you can start with a drawing (a plotted area) that is wider than it is tall ("landscape") and plot it on a page that is also wider than it is tall (so no rotation is necessary), or you can plot it on a page that is taller than it is wide ("portrait") so that the plotted area must be rotated to fit onto it.  And vice-versa...