Re: CToolTipCtrl & Property Pages

On 3 Nov., 17:07, "Matt Houser" <m...@houser.ca> wrote:


If you use your Property Pages in modeless mode, than you need to do a
HOOK. The PreTranslateMessage() doesn't work in this scenario.

namespace
{
  HHOOK i_hHook = NULL;
  YourPropertySheet* i_PropSheet = NULL;
}

// Hook procedure for WH_GETMESSAGE hook type.
LRESULT CALLBACK hook_GetMessageProc(int nCode, WPARAM wParam, LPARAM
lParam)
{
  // Switch the module state for the correct handle to be used.
  AFX_MANAGE_STATE(AfxGetStaticModuleState());

  // If this is a keystrokes message, translate it in controls'
  // PreTranslateMessage().
  LPMSG lpMsg = (LPMSG) lParam;
  if( (nCode >= 0) &&
     PM_REMOVE == wParam &&
     //(lpMsg->message >= WM_KEYFIRST && lpMsg->message <= WM_KEYLAST)
&&
     i_PropSheet &&
     i_PropSheet->PreTranslateMessage((LPMSG)lParam) )
  {
    // The value returned from this hookproc is ignored, and it
cannot
    // be used to tell Windows the message has been handled. To avoid
    // further processing, convert the message to WM_NULL before
    // returning.
    lpMsg->message = WM_NULL;
    lpMsg->lParam = 0L;
    lpMsg->wParam = 0;
  }
  // Passes the hook information to the next hook procedure in
  // the current hook chain.
  return ::CallNextHookEx(i_hHook, nCode, wParam, lParam);
}

// --------------------
YourPropertySheet::OnInitDialog()
{
  BOOL bResult = CPropertySheet::OnInitDialog();

  i_PropSheet = this;
  // Install the WH_GETMESSAGE hook function.
  i_hHook = ::SetWindowsHookEx(WH_GETMESSAGE,
                               hook_GetMessageProc,
                               AfxGetInstanceHandle(),
                               GetCurrentThreadId());
  ASSERT(i_hHook);
  return bResult;
}

// --------------------
YourPropertySheet::~YourPropertySheet()
{
  // Uninstall the WH_GETMESSAGE hook function.
  VERIFY(::UnhookWindowsHookEx(i_hHook));
}

// --------------------
BOOL YourPropertySheet::PreTranslateMessage(MSG* pMsg)
{
  YourPropertyPage* pActPage = static_cast<YourPropertyPage*>
(GetActivePage());
  if (pActPage)
  {
    pActPage->PreTranslateMessage(pMsg);
  }

  return CPropertySheet::PreTranslateMessage(pMsg);
}