Enum Duplex Path C++ Link System.Drawing.Printing.Duplex, System.Drawing underlying int32 System.Drawing Values 4 NameValueHex Default-10xFFFFFFFFFFFFFFFFSimplex10x01Horizontal30x03Vertical20x02 // System.Drawing.Printing.Duplex, System.Drawing enum class Duplex : int32 { Default = -1, Simplex = 1, Horizontal = 3, Vertical = 2, };