C / C++ / MFC

void CMainFrame::NewAddress()
{
   CString strcAddress;

   m_wndDlgBar.GetDlgItemText(IDC_EADDRESS, strcAddress);

   CHtmlView* pHTMLView = (CHtmlView*)GetActiveView();
   if (pHTMLView)
   {
      // Only access the pointer if the HTML view pointer is valid.
      pHTMLView->Navigate(strcAddress);
   }
}

ADEMA, The Way You Like It

• the button is being created/subclassed correctly: do other message handlers in your CButton-derived class get called?
• OnMouseMove() has the correct signature: void OnMouseMove(UINT nFlags, CPoint point);
• you're moving the mouse over the button

ADEMA, The Way You Like It

BEGIN_MESSAGE_MAP(CButtonDerivative, CButton)
   ON_WM_DRAWITEM_REFLECT()
   ON_WM_MOUSEMOVE()
   // ... possibly other entries
END_MESSAGE_MAP()

// ...

void CButtonDerivative::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
  // ... draw the button
}

void CButtonDerivative::OnMouseMove(UINT nFlags, CPoint point)
{
   // ... handle mouse movement
}

ADEMA, The Way You Like It

// in the worker thread
     ::PostMessage(hWnd,WM_USER_THREAD_STARTED,0,0);



// Make a handler running in the main thread that will change the cursor.

OnThreadStarted(...
{
   BeginWaitCursor();
}

OnThreadfinished(...
{
   EndWaitCursor();
...
}