Persist ActiveX Controls At Runtime

I was writing a piece of code to store and load user preferences and wanted to persist the properties of some ActiveX controls on my dialog. The following procedure seems to do the job rather nicely.

BOOL PersistActiveX(CArchive& ar, CWnd* pActiveX)
{
 ASSERT(pActiveX);

 HRESULT hr = E_FAIL;

 // Create an archive stream
 CArchiveStream stm(&ar);
 LPPERSISTSTREAMINIT pPersStm = NULL;
 LPUNKNOWN lpUnk = pActiveX->GetControlUnknown();

 if(lpUnk)
 {
  // We have the IUnknown interface, so 
  // get the IPersistStreamInit
  lpUnk->QueryInterface(IID_IPersistStreamInit, 
                        (LPVOID*)&pPersStm);

  if(pPersStm)
  {
   // We have the relevant interface so load or save the data
   // based on the type of archive we have.
   if(ar.IsLoading())
   {
    hr = pPersStm->Load(&stm);
   }
   else
   {
    hr = pPersStm->Save(&stm, FALSE);
   }
  }

  // Must release the interface
  pPersStm->Release();
 }

 return SUCCEEDED(hr);
}
This can then be called simply by doing the following:
PersistActiveX(ar, GetDlgItem(IDC_SOMEACTIVEX));


Comments

  • Persistence CArray in ActiveX

    Posted by Legacy on 01/18/2004 12:00am

    Originally posted by: Diego

    Do you know how can I save a CArray in to the persistance of the ActiveX - PX_Blob????

    Thanks

    • hello

      Posted by tqqttq on 05/30/2005 03:06am

      good

      Reply
    Reply
  • Problem with successive serializing...

    Posted by Legacy on 09/14/2001 12:00am

    Originally posted by: Lez

    Hello,

    I'm using this function for serializing (loading) MFC ActiveX components. It Works great with the first component but i dont know why all others doesn't. It seems that the File (or the archive) is closing by the line pStream->Load(&stm).
    Does anyone have a solution ?

    Reply
  • How to use Web Browser control in ATL?

    Posted by Legacy on 10/09/2000 12:00am

    Originally posted by: Peng Fei

    Hi,

    I need use Web Browser control in my ATL,
    but I cannot create the dialog with Web Browser.

    Please give me a solution.

    regards

    Reply
  • Persist ActiveX Controls at Runtime

    Posted by Legacy on 02/28/2000 12:00am

    Originally posted by: kiran

    It is not mentioned as to how the CArchive object is created.

    Reply
  • CArchiveStream

    Posted by Legacy on 02/21/2000 12:00am

    Originally posted by: Erling Eybye

    CArchiveStream ??? is this class a MFC class ?
    I can't find it on Microsoft's homepage.

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Java developers know that testing code changes can be a huge pain, and waiting for an application to redeploy after a code fix can take an eternity. Wouldn't it be great if you could see your code changes immediately, fine-tune, debug, explore and deploy code without waiting for ages? In this white paper, find out how that's possible with a Java plugin that drastically changes the way you develop, test and run Java applications. Discover the advantages of this plugin, and the changes you can expect to see …

  • Live Event Date: September 10, 2014 @ 11:00 a.m. ET / 8:00 a.m. PT Modern mobile applications connect systems-of-engagement (mobile apps) with systems-of-record (traditional IT) to deliver new and innovative business value. But the lifecycle for development of mobile apps is also new and different. Emerging trends in mobile development call for faster delivery of incremental features, coupled with feedback from the users of the app "in the wild". This loop of continuous delivery and continuous feedback is …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds