void DrawSphere()
{
AcDbBlockTable* pBlockTable;
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);
AcDbBlockTableRecord* pBlockTableRecord;
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
pBlockTable->close();
AcDb3dSolid* sphere = new AcDb3dSolid();
sphere->createSphere(100);
AcDbObjectId obId;
pBlockTableRecord->appendAcDbEntity(obId, sphere);
pBlockTableRecord->close();
sphere->close();
}