>Would somebody be kind enough to translate the following C code to VFP, please. The code is used to calculate CRC for "chunks" of a PNG file.

Why port to vfp instead of compiling a fll ? You *will* incur a performance penalty when running this type of code in vfp (both from tight loops of interpreted language and not having types pre-compiled, so if you plan to work on massive amounts of data this would be contra-productive.

If you really need vfp source (debugging ?), think about compiling with the dotnetcompiler into a dotnet-dll and calling that from vfp: one expensive call between runtimes should still result in better times created by static typing.

regards

thomas