Topic Title

Here is what I learned:

When presented with a case statement in a record declaration, Delphi will allocate memory to encompass the largest requirements defined in the Case statement using the same memory area. The data for a line, circle polygon etc. all have the same offset (start point) in the memory structure for the record. The asint reference is not relevant except as a place holder for writing the record structure using the case statement. In use, the code that uses the data knows how to read the specifics. In the case of entities, the enttype field tells datacad what format should be used to read the data from the case statement. If the entity is a circle, it is read from the datablock as data for a circle. If you identified the data as a polygon, instead, but handed it the same data record, it would try to read the same memory area as if it contained a polygon (it would get meaningless information, but would still try).

Thanks ERT. Variable Records were an element of Delphi I had not been aware of in my reading. (I guess I fell asleep in that chapter.)