s3dw_surface - root of s3d widget
#include <s3dw.h>
struct _s3dw_surface { s3dw_widget widget; uint32_t oid_title; uint32_t oid_tbar; char *title; }
A surface is the window of this widget library, holding all of our elements like buttons, input fields etc ...
Simon Wunderlich Author of s3d