API_Box3D objBox3 = { 0,0,0,0,0,0 };ACAPI_Database(APIDb_GetExtent3DID,
&objBox3);//If a GDL that is partially displayed by the 3Dfilter is
included, the entire GDL range is returned instead of the displayed
part.If GDL is not included (columns and beams, etc.), the partiall...