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Hi,

I have a CMDIFrameWnd derived frame, I want to set the frame window to top most when it receive a user-defined WM_ message which send from frame’s child window.
and the SetWindowPos function can set the position but can not put the window to top.
MoveWindow take same effect;

here is my code:
--------------------------------------------------------------------------------------------
class CMainFrame
    : public CExtNCW < CMDIFrameWnd >
{

protected:
    //{{AFX_MSG(CMainFrame)
...........
    //}}AFX_MSG
.........
    afx_msg LRESULT OnTMClose(WPARAM wParam, LPARAM lParam);
    afx_msg LRESULT OnTMOpen(WPARAM wParam, LPARAM lParam);

    DECLARE_MESSAGE_MAP()
};


BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
    //{{AFX_MSG_MAP(CMainFrame)
    ON_WM_CREATE()
    ON_WM_TIMER()
    //}}AFX_MSG_MAP
.................
    ON_MESSAGE(WM_DISABLEMAIN ,OnTMClose)
    ON_MESSAGE(WM_ENABLEMAIN,OnTMOpen)
    ..........
END_MESSAGE_MAP()


LRESULT CMainFrame::OnTMOpen(WPARAM wParam, LPARAM lParam)
{
    bClosed=FALSE;
    m_wndSplitter.SetColumnInfo(0,GetSystemMetrics (SM_CXSCREEN)-DEF_RIGHTVIEWWIDTH,500);
    m_wndSplitter.SetColumnInfo(1,DEF_RIGHTVIEWWIDTH,20);
    m_wndSplitter.RecalcLayout();
    m_wndStatusBar.ShowWindow(SW_SHOW);
    EnableWindow(TRUE);
    CWnd * pParent=::AfxGetMainWnd();
    BOOL bOpen;
    bOpen=::SetWindowPos(pParent->m_hWnd,
                HWND_TOPMOST ,//wndBottom wndNoTopMost wndTop
                0,0,GetSystemMetrics (SM_CXSCREEN ),
                GetSystemMetrics (SM_CYSCREEN ),SWP_SHOWWINDOW);
    if (!bOpen)
    {
        CString Err;
        Err.Format("LastError %d",GetLastError());
        AfxMessageBox(Err);
    }
    /*
    ShowWindow(SW_SHOWMAXIMIZED);
    CRect cRect;
    cRect.top = 0;
    cRect.left = 0;
    cRect.right = GetSystemMetrics (SM_CXSCREEN);
    cRect.bottom = GetSystemMetrics (SM_CYSCREEN);
    MoveWindow (&cRect);
    ::SetForegroundWindow (this->m_hWnd);
    ::BringWindowToTop(this->m_hWnd);
    ::SetActiveWindow(this->m_hWnd);
    */

    return 0;
}

We guess the problem hides somewhere outside the source code provided in your message. We have been using the CFrameWnd::BringToTop() method in our projects and never had any problems.