The properties return a page width of document on the screen.
property PageWidthPix: Integer;
property PageWidth100Pix: Integer;
PageWidthPix returns the page width converted to screen pixels and scaled according to ViewProperty.ZoomPercent (i.e. a page width as it can be seen in the control window).
PageWidth100Pix returns the page width converted to screen pixels in ZoomPercent=100. The same value measured in UnitsProgram is returned in ViewProperty.PageWidth.
The page width is defined in PageProperty.PageWidth.
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