Class Descriptors

Class descriptors should be read and written using readAddress() and writeAddress() functions, as shown below:

AcDbDwgFiler *pFiler = NULL;
if ((pFiler = undoFiler()) != NULL) {
undoFiler()->writeItem((long)AsdkPoly::desc()); // Wrong!
...
undoFiler()->writeAddress(AsdkPoly::desc()); // Right
...

}