[jitender]

#define MyAppName "My Program"
#define MyAppVersion "1.5"
#define MyAppPublisher "My Company, Inc."
#define MyAppURL "http://www.example.com/"
#define MyAppExeName "MyProg.exe"

[Setup]
; NOTE: The value of AppId uniquely identifies this application.
; Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{AEB246C4-0FD6-4C59-8EEF-03944CDFDDA5}
AppName={#MyAppName}
AppVersion={#MyAppVersion}
;AppVerName={#MyAppName} {#MyAppVersion}
AppPublisher={#MyAppPublisher}
AppPublisherURL={#MyAppURL}
AppSupportURL={#MyAppURL}
AppUpdatesURL={#MyAppURL}
DefaultDirName={pf}\{#MyAppName}
DisableProgramGroupPage=yes
OutputDir=C:\Users\JS\Downloads
OutputBaseFilename=setup
Compression=lzma
SolidCompression=yes

[Languages]
Name: english; MessagesFile: compiler:Default.isl

[Tasks]
Name: desktopicon; Description: {cm:CreateDesktopIcon}; GroupDescription: {cm:AdditionalIcons}; Flags: unchecked

[Files]
Source: C:\Program Files (x86)\Inno Setup 5\Examples\MyProg.exe; DestDir: {app}; Flags: ignoreversion
; NOTE: Don't use "Flags: ignoreversion" on any shared system files

[Icons]
Name: {commonprograms}\{#MyAppName}; Filename: {app}\{#MyAppExeName}
Name: {commondesktop}\{#MyAppName}; Filename: {app}\{#MyAppExeName}; Tasks: desktopicon

[Run]
Filename: {app}\{#MyAppExeName}; Description: {cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}; Flags: nowait postinstall skipifsilent

var
  URLText: TNewStaticText;

procedure URLTextClick(Sender: TObject);
var
  ErrorCode: Integer;
begin
  ShellExec('open', 'http://fileforums.com', '', '', SW_SHOWNORMAL, ewNoWait, ErrorCode);
end;

procedure InitializeWizard();
begin
  URLText := TNewStaticText.Create(WizardForm);
  with URLText do begin
    Parent := WizardForm;
    Left := ScaleX(5);
    Top := ScaleY(327);
    Width := ScaleX(156);
    Height := ScaleY(23);
    Caption := 'URL Text';
    OnClick := @URLTextClick;
  end;
end;

I have above script now please tell me the code and where to insert the code.And what to edit in it if necessary.