[Nordek]

У меня в расширенной версии есть function WizardSilent: Boolean; // Returns True if Setup is running silently, False otherwise. »

Подтверждаю, есть такое (выделил жирным):

читать дальше »

Код:

// Support functions
// Here's the list of support functions that can be called from
// within the Pascal script.

// Setup or Uninstall Info functions

function GetCmdTail: String; // Returns all command line parameters passed to Setup or Uninstall as a single String.
function ParamCount: Integer; // Returns the number of command line parameters passed to Setup or Uninstall.
function ParamStr(Index: Integer): String; // Returns the Index-th command line parameter passed to Setup or Uninstall.

function ActiveLanguage: String; // Returns the name of the active language.

function CustomMessage(const MsgName: String): String; // Returns the value of the [CustomMessages] entry with the specified name.
function FmtMessage(const S: String; const Args: array of String): String; // Formats the String S using the specified String arguments.
function SetupMessage(const ID: TSetupMessageID): String; // Returns the value of the specified message.

function WizardDirValue: String; // Returns the current contents of the edit control on the Select Destination Location page of the wizard.
function WizardGroupValue: String; // Returns the current contents of the edit control on the Select Start Menu Folder page of the wizard.
function WizardNoIcons: Boolean; // Returns the current setting of the Don't create any icons check box on the Select Start Menu Folder page of the wizard.
function WizardSetupType(const Description: Boolean): String; // Returns the name or description of the setup type selected by the user.
function WizardSelectedComponents(const Descriptions: Boolean): String; // Returns a comma-separated list of names or descriptions of the components selected by the user.
function WizardSelectedTasks(const Descriptions: Boolean): String; // Returns a comma-separated list of names or descriptions of the tasks selected by the user.
function WizardSilent: Boolean; // Returns True if Setup is running silently, False otherwise.

function IsUninstaller: Boolean;
function UninstallSilent: Boolean;

function CurrentFileName: String;

function ExpandConstant(const S: String): String;
function ExpandConstantEx(const S: String; const CustomConst, CustomValue: String): String;

function IsComponentSelected(const Components: String): Boolean;
function IsTaskSelected(const Tasks: String): Boolean;

procedure ExtractTemporaryFile(const FileName: String);
procedure ExtractTemporaryFileEx(const FileName: String; const DestDir: String);
procedure ExtractTemporaryFileToStream(const FileName: String; const Stream: TStream);
function ExtractTemporaryFileSize(const FileName: String): LongWord;
procedure ExtractTemporaryFileToBuffer(const FileName: String; Buffer: Integer);

function GetSetupPreviousData(const ValueName, DefaultValueData: String): String;
function SetSetupPreviousData(const PreviousDataKey: Integer; const ValueName, ValueData: String): Boolean;
function GetPreviousData(const ValueName, DefaultValueData: String): String;
function SetPreviousData(const PreviousDataKey: Integer; const ValueName, ValueData: String): Boolean;

function Terminated: Boolean;

function RmSessionStarted: Boolean;

в оф.справке тоже есть упоминание. »

И такое есть в русской справке "Inno Setup версия 5.4.3":
Скрипты на Pascal » Встроенные функции » function WizardSilent: Boolean; »

Прототип: function WizardSilent: Boolean; Описание: Возвращает значение True, если инсталлятор запущен в тихом режиме, в обратном случае False.