PDF Mosaic: How to add Launch action in PDF document

using PDFMosaic;
using System;
using System.IO;
 
namespace LaunchAction
{
    class LaunchAction
    {
        static void Main()
        {
            PDFDocument document = new PDFDocument();
            PDFPage page = new PDFPage(PDFPaperFormat.A4);
 
            PDFPushButton button = new PDFPushButton(20, 40, 60, 15, "btn1");
            button.Caption = "Launch";
            button.Font.Size = 8;
            page.Annotations.Add(button);
 
            PDFLaunchAction launchAction = new PDFLaunchAction(Path.GetFullPath("..\\..\\two_pilots.bmp"));
            button.OnActivated = launchAction;
 
            document.Pages.Add(page);
            document.Save("LaunchAction.pdf", true);
        }
    }
}