an emeditor magic. web preview pane showing a pdf file #Emeditor

function WebPreview_Navigate(strURL) {
  var wndEmeditor = shell.FindWindow("EmEditorMainFrame3", "" );
  var wndEEPaneContainer;
  try {
    wndEEPaneContainer = wndEmeditor.FindWindow("EEPaneContainer", "");
  } catch(e) {
    editor.ExecuteCommandByID(5632+9); Sleep(100);
    wndEEPaneContainer = wndEmeditor.FindWindow("EEPaneContainer", "");
  }

  var wndEmEditorWebPreview = wndEEPaneContainer.FindWindow("EmEditorWebPreview", "");
  var wndShellEmbedding = wndEmEditorWebPreview.FindWindow("Shell Embedding", "");
  var wndShellDocObjectView = wndShellEmbedding.FindWindow("Shell DocObject View", "");
  var wndInternetExplorerServer = wndShellDocObjectView.FindWindow("Internet Explorer_Server", "");

  var com = new ActiveXObject("CrowdyEmeditorCom.WebPreviewController");
  var Browser2 = com.GetIEBrowser(wndInternetExplorerServer.hWnd);
  if (Browser2 != null) {
    Browser2.Navigate(strURL);
  } else {
    alert('Browser2 is null.');
  }
}