FIX: Apply Button on an ATL Control's Property Page Is Disabled

MORE INFORMATION

1. Add an additional call to OnStatusChanged() right after SetDirty() is called. Using the ATL Polygon sample code, the change is shown below:

         LRESULT OnSidesChange(WORD wNotify, WORD wID, HWND hWnd, BOOL&
            bHandled)
         {
            SetDirty(TRUE);
            m_pPageSite->OnStatusChange(
               PROPPAGESTATUS_DIRTY | PROPPAGESTATUS_VALIDATE);
            return 0;
         }
   							

2. Change the SetDirty() function in Atlctl.h to the following:

         void SetDirty(BOOL bDirty)
         {
            T* pT = static_cast<T*>(this);
            if (pT->m_bDirty != bDirty)
            {
               pT-.m_bDirty = bDirty;
               if (bDirty)
                  pT->m_pPageSite->OnStatusChange(
                     PROPPAGESTATUS_DIRTY | PROPPAGESTATUS_VALIDATE);
            }
         }
   							

Steps to Reproduce Behavior

1. Place an ATL Polygon control on a Visual Basic Form.
2. Display the Polygon control's Property Pages dialog box by selecting the (Custom) property from Visual Basic's Properties window.
   
   NOTE: The Apply button on the Property Pages window is initially disabled.
3. Enter an integer value in the Sides edit box.
   
   NOTE: The Apply button remains disabled.