Delphi File Size in Bytes

The FileSize function returns the size of a file, in bytes -- a useful result for certain file-handing applications within a Delphi program. Get File Size The FileSize function returns the size of a file in bytes; the function returns -1 if the file was not found. // returns file size in bytes or -1 if not found.function FileSize(fileName : wideString) : Int64;varsr : TSearchRec;beginif FindFirst(fileName, faAnyFile, sr ) 0 thenresult : Int64(sr.FindData.nFileSizeHigh) shl Int64(32) Int64(sr.FindData.nFileSizeLow)elseresult : -1;FindClose(sr);end; When you have the size of a file in bytes, you may wish to format the size for display (Kb, Mb, Gb) to assist your end users in comprehending the data without having to convert units.