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Editorial Team
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Asked: 2026-05-12T10:05:03+00:00

Is there a way to generate a new GUID from inside the Inno Setup

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Is there a way to generate a new GUID from inside the Inno Setup script ?

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  1. Editorial Team

    Found this on innosetup newsgroup archive:

    http://news.jrsoftware.org/news/innosetup/msg76234.html

    I haven’t tested it.

    [Code]

type
  TGUID = record
    D1: LongWord;
    D2: Word;
    D3: Word;
    D4: array[0..7] of Byte;
  end;

function CoCreateGuid(var Guid:TGuid):integer;
 external 'CoCreateGuid@ole32.dll stdcall';

function inttohex(l:longword; digits:integer):string;
var hexchars:string;
begin
 hexchars:='0123456789ABCDEF';
 setlength(result,digits);
 while (digits>0) do begin
  result[digits]:=hexchars[l mod 16+1];
  l:=l div 16;
  digits:=digits-1;
 end;
end;

function GetGuid(dummy:string):string;
var Guid:TGuid;
begin
  if CoCreateGuid(Guid)=0 then begin
  result:='{'+IntToHex(Guid.D1,8)+'-'+
           IntToHex(Guid.D2,4)+'-'+
           IntToHex(Guid.D3,4)+'-'+
           IntToHex(Guid.D4[0],2)+IntToHex(Guid.D4[1],2)+'-'+
           IntToHex(Guid.D4[2],2)+IntToHex(Guid.D4[3],2)+
           IntToHex(Guid.D4[4],2)+IntToHex(Guid.D4[5],2)+
           IntToHex(Guid.D4[6],2)+IntToHex(Guid.D4[7],2)+
           '}';
  end else
    result:='{00000000-0000-0000-0000-000000000000}';
end;

function InitializeSetup(): Boolean;
begin
  MsgBox(GetGuid(''), mbInformation, MB_OK);
  Result := False;
end;
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