Sets the value of GTK_PRINT_SETTINGS_DUPLEX.
GTK_PRINT_SETTINGS_DUPLEX
gtkPrintSettingsSetDuplex(object, duplex)
object
a GtkPrintSettings
GtkPrintSettings
duplex
a GtkPrintDuplex value
GtkPrintDuplex
Since 2.10
Derived by RGtkGen from GTK+ documentation