CXTTipWindow::CreateShadow() bug

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   To correctly modify the window class style in lines 109 and 114, GetClassLong() must be called instead of GetWindowLong() (which returns 0 instead of the current style).

But even after fixing this: this implemention will cause an assertion in the debug build each time a tip window with m_dwTipStyle == (TWS_XT_ALPHASHADOW | TWS_XT_DROPSHADOW) has been displayed. Next time a tip window is created the following assertion in AfxRegisterWndClass() will fail:

    // see if the class already exists
    WNDCLASS wndcls;
    if (::AfxCtxGetClassInfo(hInst, lpszName, &wndcls))
    {
        // already registered, assert everything is good
        ASSERT(wndcls.style == nClassStyle);

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VolkerE Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 February 2006 Location: Germany Status: Offline Points: 8	Post Options Post Reply Quote VolkerE Report Post Thanks(0) Quote Reply Topic: CXTTipWindow::CreateShadow() bug Posted: 04 January 2011 at 3:42am
	To correctly modify the window class style in lines 109 and 114, GetClassLong() must be called instead of GetWindowLong() (which returns 0 instead of the current style). But even after fixing this: this implemention will cause an assertion in the debug build each time a tip window with m_dwTipStyle == (TWS_XT_ALPHASHADOW \| TWS_XT_DROPSHADOW) has been displayed. Next time a tip window is created the following assertion in AfxRegisterWndClass() will fail: // see if the class already exists WNDCLASS wndcls; if (::AfxCtxGetClassInfo(hInst, lpszName, &wndcls)) { // already registered, assert everything is good ASSERT(wndcls.style == nClassStyle);

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 04 January 2011 at 10:35am
	Thanks a lot. Please also change Create method as BOOL CXTPTipWindow::Create(CWnd* pParentWnd) { // register the wnd class. XTPDrawHelpers()->RegisterWndClass(0, _T("XTPTipWindow"), CS_SAVEBITS \| CS_HREDRAW \| CS_VREDRAW); // call the base class for creation. if (!CWnd::CreateEx(0, _T("XTPTipWindow"), _T(""), WS_POPUP, 0, 0, 0, 0, pParentWnd->m_hWnd, 0, NULL)) { ...
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

VolkerE Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 February 2006 Location: Germany Status: Offline Points: 8	Post Options Post Reply Quote VolkerE Report Post Thanks(0) Quote Reply Posted: 04 January 2011 at 11:02am
	Hi Oleg, thank you for the quick response. Works fine now... Regards, Volker