unit RandomDLL; { Dynamically load my little DLL file RANDOM.DLL / RANDOM-X86.DLL in Embarcadero Delphi and use it to generate random Bytes. It's using Microsoft Crypto API. The returned string is hex encoded. The DLL file is Unicode and is available in both x64 and x86 variants. Download the DLL files here: https://www.andreas-software.com/RANDOM.DLL.ZIP https://www.andreas-software.com/RANDOM-X86.DLL.ZIP } interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes; function GenerateRandomHexBytes(IntBytes: NativeInt): string; implementation type TGenerateRandomHexBytesFunction = function(IntBytes: NativeInt; OutputBuffer: Pointer): NativeInt; stdcall; function GenerateRandomHexBytes(IntBytes: NativeInt): string; var DLLFileName: string; var DLLFunctionName: string; var DLLHandle: NativeUInt; var GenerateRandomHexBytesFunction: TGenerateRandomHexBytesFunction; begin Result := ''; if IntBytes > 0 then begin DLLFileName := 'RANDOM'; {$IFDEF WIN32} DLLFileName := DLLFileName + '-X86'; {$ENDIF} DLLFileName := DLLFileName + '.DLL'; DLLFunctionName := 'GenerateRandomHexBytes'; DLLHandle := LoadLibrary(PWideChar(DLLFileName)); if DLLHandle <> 0 then begin @GenerateRandomHexBytesFunction := GetProcAddress(DLLHandle, PWideChar(DLLFunctionName)); if Assigned(GenerateRandomHexBytesFunction) = True then begin SetLength(Result, IntBytes * 2); if GenerateRandomHexBytesFunction(IntBytes, Pointer(Result)) = ((IntBytes * 2) * 2) then begin // OK. end else begin Result := ''; end; end; FreeLibrary(DLLHandle); end; end; end; end.