>Why not
>
>(1) Keep the original class
>
>(2) add a method crc32Unsigned() as UInteger ?
>The method would use the existing crc32 Integer method, convert the result to UInteger and return that ?
>
>
>That way, you don't have to change that public property

I need to keep the existing class as is. I only want to use UInteger for the support of VFP SYS(2007).

>Should there be any more warnings, there must be a way to turn them off

I guess so. I will have to check in the project properties Compile option.