[ Version ( since = "2.8" ) ]
public void drag_set_icon_name (DragContext context, string icon_name, int hot_x, int hot_y)
Sets the icon for a given drag from a named themed icon.
the context for a drag (This must be called with a context for the source side of a drag)
name of icon to use
the X offset of the hotspot within the icon
the Y offset of the hotspot within the icon