||||_$
_$ resbuf* assoc(resbuf* ebuf,int restype)
{
while((ebuf != NULL) && (ebuf->restype != restype))
  ebuf = ebuf->rbnext;
return ebuf;
}


void Z0()//Z Value Zero
{
        ads_name ename, entGroup;
        resbuf *entGet, *assocSp, *assocEp,*assocEnt;
        long count=0;

        resbuf* rbFilter = ads_buildlist (-4, "<or",RTDXF0, "CIRCLE",RTDXF0, "LINE", RTDXF0, "ARC", RTDXF0, "LWPOLYLINE", RTDXF0, "POLYLINE", -4, "or>", 0) ;
        if(ads_ssget(NULL, NULL, NULL, rbFilter, entGroup) != RTNORM) return;

        ads_sslength(entGroup, &count);
        for(int i=0; i < count; i++)
        {
                ads_ssname(entGroup,i,ename);
                entGet = ads_entget(ename);
                assocEnt = assoc(entGet, 0);

                if(strcmp(assocEnt->resval.rstring, "LINE") == 0)
                {
                        assocSp = assoc(assocEnt, 10);
                        assocEp = assoc(assocEnt, 11);
                        if(assocSp->resval.rpoint[2] != 0.0)
                                assocSp->resval.rpoint[2] = 0.0;
                        if(assocEp->resval.rpoint[2] != 0.0)
                                assocEp->resval.rpoint[2] = 0.0;
                        
                }
                else if(strcmp(assocEnt->resval.rstring, "ARC") == 0 || strcmp(assocEnt->resval.rstring, "CIRCLE") == 0)
                {
                        assocSp = assoc(assocEnt, 10);
                        
                        if(assocSp->resval.rpoint[2] != 0.0)
                                assocSp->resval.rpoint[2] = 0.0;
                        
                }
                else if(strcmp(assocEnt->resval.rstring, "LWPOLYLINE") == 0)
                {
                        assocSp = assoc(assocEnt, 38);
                        
                        if(assocSp->resval.rreal != 0.0)
                                assocSp->resval.rreal = 0.0;
                        
                }
                else if(strcmp(assocEnt->resval.rstring, "POLYLINE") == 0)
                {
                        assocSp = assoc(assocEnt, 10);
                        
                        if(assocSp->resval.rpoint[2] != 0.0)
                                assocSp->resval.rpoint[2] = 0.0;
                        
                }
                else;
                ads_entmod(entGet);

        }        
}