no. you need pan_setslider().

put something like this is a while loop after panel creation (you don't need pointers as in the example i.e. you can ignore the *-s and use only simple var variables)

Code:
// fog limits update
   		if (*sky_fogend>*sky_camclipfar)
   			{
   				*sky_fogend = *sky_camclipfar;
   			}
   		if (*sky_fogstart>*sky_fogend)
   			{
   				*sky_fogstart = *sky_fogend;
   			}
   		pan_setslider(sky_lowpanel, 10,	100+22,365+2,	horiz_slider_bmp,slider_knob_bmp,	0,*sky_fogend,			*sky_fogstart);
   		pan_setslider(sky_lowpanel, 11,	100+22,385+2,	horiz_slider_bmp,slider_knob_bmp,	*sky_fogstart,*sky_camclipfar,	*sky_fogend);

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