How to get Inno Setup to unzip a file it installed (all as part of the one installation process)

Question

To save bandwidth/space as well as prevent accidental meddling, the installation files for a database product (call it Ajax), have been zipped up (call that file \"AJAX_Inst

Answer 1

You can just create silent self-extracting archive (SFX) archive, example described here how to create SFX archive for stuff you need, and write Pascal code to just run it like this (script for Inno Setup 6.0.2):

[Tasks]
Name: "intallSenselockDriver"; Description: "Install Senselock driver."; GroupDescription: "Install the necessary software:";

[Code]
function ExecTmpFile(FileName: String): Boolean;
var
  ResultCode: Integer;
begin
  if not Exec(ExpandConstant('{tmp}\' + FileName), '', '', SW_SHOWNORMAL, ewWaitUntilTerminated, ResultCode)
  then
    begin
      MsgBox('Other installer failed to run!' + #13#10 + SysErrorMessage(ResultCode), mbError, MB_OK);
      Result := False;
    end
  else
    Result := True;
end;

procedure RunOtherInstallerSFX(ArchiveName: String; ExePath: String);
begin
  ExtractTemporaryFile(ArchiveName);
  ExecTmpFile(ArchiveName);
  ExecTmpFile(ExePath);
end;

function PrepareToInstall(var NeedsRestart: Boolean): String;
begin
  if WizardIsTaskSelected('intallSenselockDriver') then
    RunOtherInstallerSFX('1_senselock_windows_3.1.0.0.exe', '1_senselock_windows_3.1.0.0\InstWiz3.exe');

  Result := '';
end;

It worked perfectly for me.