Description: This object provides the value of the declared dimension, in the feed direction, of the media that is (or, if empty, was or will be) in this input sub-unit. The feed direction is the direction in which the media is fed on this sub-unit. This dimension is measured in input sub-unit dimensional units (prtInputDimUnit). If this input sub-unit can reliably sense this value, the value is sensed by the printer and may not be changed by management requests. Otherwise, the value may be changed. The value (-1) means other and specifically means that this sub-unit places no restriction on this parameter. The value (-2) indicates unknown. Refer to ftp://ftp.pwg.org/pub/pwg/pmp/drafts/pmib_031698.txt, for more details in the Standard Printer MIB. Additional information: For trays 2 and 3 (which can reliably sense this value) these objects behave exactly the same as prtInputMediaDimFeedDirChosen. Attempting to set the objects for tray 2 or 3 will cause to be returned. The default values assume the trays are configured for letter size paper (or COM10, in the case of the envelope feeder). For tray 1, the value is the dimension for the media size currently declared. For the envelope feeder (tray 4), the value is the dimension for the media size currently declared. Valid values are 0 to 268435455. If a value within 0.2 inches of a standard size (e.g. 85001) is chosen when setting these objects, the standard size will be set for the specified tray if the value of prtInputMediaDimXFeedDirDeclared is also set to within 0.2 inches of the same standard size. If the value is not within 0.2 inches, Custom will be chosen as the size if it is supported by the specified tray, otherwise the first available standard size for the tray will be selected.