Example 2: C API Code to retrieve <Polygons>

void FindPolygons{ SE_Transmittal xmittal, SE_Object root_obj )

{

SE_Return_Code ret;

SE_Search_Rule polygon_search_rules[] =

{

SE_DRM_CLASS_MATCH( POLYGON ) /* Infinite depth */

}

SE_Search_Filter search_filter;

SE_Iterator iterator;

SE_Object polygon_obj;

ret = SE_CreateSearchFilter( xmittal, polygon_search_rules, &search_filter );

ret = SE_InitalizeComponentIterator3( root_obj, search_filter, &iterator );

while( SE_IsIteratorEmpty ( iterator) == SE_FALSE )

{

ret = SE_GetNextObject( iterator, &polygon_obj, NULL ;

/* process the polygon object */

ret = SE_FreeObject( polygon_obj );

}

ret = SE_FreeIterator( Iterator );

ret = SE_FreeSearchFilter( search_filter );

}