> Repeated the compilation with the new FILEIO.C. Passed. DLL is the same size as with the previous method of compilation. Without FILEIO_WIN32_DLL defined, the preprocessed code is unchanged substantively. (Only whitespace and #line directives will differ.) So only debug builds could differ in size. > Repeated my tests with the new FILEIO.DLL. \[(using -DFILEIO_WIN32_DLL)\] Passed. Thanks for verifying (and for the CL options carification.) > I noticed that the new FILEIO.C has the same date, namely, 2014-06-13. Should this change? The headings of files in the repository are left alone as the source evolves.