Subclass a control on a property page: problems ???

This question was posted by another person on another forum, but it is exactly the issue I'm running into also. I dont know and cant find the answer he got, but someone here at EE helped him out to success and I need the same answers. Thank You.

I'm trying to dynamically subclass a field on a property page.  The code looks like this:

  BOOL CMyPropertyPage::OnInitDialog()
  {
    CPropertyPage::OnInitDialog();
    m_myedithandler.SubclassDlgItem(IDC_TEXT,this);
    return TRUE;  
  }

The SubclassDlgItem fails on an ASSERT in

  BOOL CWnd::Attach(HWND hWndNew)
  {
    ASSERT(m_hWnd == NULL);                       //OK
    ASSERT(FromHandlePermanent(hWndNew) == NULL); //fails
    ...

I used the same override logic on an edit field in a regular dialog
without any problem.  Is there something special about subclassing
on a property page?  Or can someone point me to something else
I am doing wrong?