title: Inno Setup - How to edit the "About Setup" dialog text box
body: <p>I need to edit or replace the text in the <code>About Setup</code> dialog box text of Inno Setup.</p>
  <p>Here is a picture:</p>
  <p><img src="https://i.stack.imgur.com/t6vZQ.png" alt="enter image description here" /></p>
  <p>Looking in the internet i got this code:</p>
  <pre class="lang-pascal prettyprint-override"><code>[Files]
  Source: CallbackCtrl.dll; Flags: dontcopy
  
  [Code]
  type
    TWFProc = function(h:hWnd;Msg,wParam,lParam:Longint):Longint;
  
  function CallWindowProc(lpPrevWndFunc: Longint; hWnd: HWND; Msg: UINT; wParam: Longint; lParam: Longint): Longint; external 'CallWindowProcA@user32.dll stdcall';
  function SetWindowLong(Wnd: HWnd; Index: Integer; NewLong: Longint): Longint; external 'SetWindowLongA@user32.dll stdcall';
  function WrapWFProc(Callback: TWFProc; ParamCount: Integer): Longword; external 'wrapcallbackaddr@files:CallbackCtrl.dll stdcall';
  
  var
    OldProc:Longint;
  
  procedure AboutSetupClick;
  begin
    //Edit your text here
    MsgBox('CUSTOM TEXT HERE', mbInformation, MB_OK);
  end;
  
  function WFWndProc(h:HWND;Msg,wParam,lParam:Longint):Longint;
  begin
    if (Msg=$112) and (wParam=9999) then begin
      Result:=0;
      AboutSetupClick;
    end else begin
      if Msg=$2 then SetWindowLong(WizardForm.Handle,-4,OldProc);
      Result:=CallWindowProc(OldProc,h,Msg,wParam,lParam);
    end;
  end;
  
  procedure InitializeWizard;
  begin
    OldProc:=SetWindowLong(WizardForm.Handle,-4,WrapWFProc(@WFWndProc,4));
  end;
  </code></pre>
  <p>Seems to work fine..</p>
  <p><img src="https://i.stack.imgur.com/qfQMy.png" alt="enter image description here" /></p>
  <p>But if i close the installer, i get crash message.</p>
  <p><img src="https://i.stack.imgur.com/rCsam.png" alt="enter image description here" /></p>
  <p>Please i need help to fix this code or give a better example to change the text in the About Setup dialog text box.</p>
  <p>The DLL i used.
  <a href="http://www.mediafire.com/?ahsufiayt7fp8p2" rel="nofollow noreferrer">HERE</a></p>