proxl_xlib(?ProXLobj, ?Type, ?Xid)
     proxl_xlib(?ProXLobj, ?Type, ?Xid, ?Display)

ProXLobj is a ProXL object of Type on Display whose XID is Xid. If Display is not specified, it is assumed to be the display of the current default screen. Type is one of window, pixmap, font, cursor, or colormap. Either ProXLobj or all three of Type, Xid, and Display must be bound. proxl_xlib/3 fails if ProXLobj is bound to a ProXL object on a display other than the display of the default screen.