SendMessage

Et lille udpluk fra et program jeg har lavet, måske du kan bruge det til noget...
(Koden er i MFC)


void CInfiltratorDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
    CWnd* pWnd = ChildWindowFromPoint(point);
    if(pWnd && pWnd->GetSafeHwnd() == m_stcIconHolder.GetSafeHwnd())
    {
        SetCapture();
        SetCursor(m_hFindCursor);
        m_stcIconHolder.SetIcon(m_hBlankIcon);

        m_bIsCapturing = true;
    }
   
    CDialog::OnLButtonDown(nFlags, point);
}


void CInfiltratorDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
    if(m_bIsCapturing)
    {
        ReleaseCapture();
        m_bIsCapturing = false;
        SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW));
        m_stcIconHolder.SetIcon(m_hFindIcon);
    }
   
    CDialog::OnLButtonUp(nFlags, point);
}


void CInfiltratorDlg::OnMouseMove(UINT nFlags, CPoint point)
{
    if(m_bIsCapturing)
    {
        ClientToScreen(&point);

        m_strXYPos.Format("X=%ld, Y=%ld", point.x, point.y);
        m_strWndName = "";
        m_strWndHandle = _T("");
        m_strWndClass = _T("");

        m_pFoundWnd = CWnd::WindowFromPoint(point);
        m_hFoundWnd = m_pFoundWnd->GetSafeHwnd();

        if(m_pFoundWnd)
        {
            // Make sure that the window doesn't 'belong' to us
            if((::GetWindowThreadProcessId(GetSafeHwnd(), NULL)) != (::GetWindowThreadProcessId(m_hFoundWnd, NULL)))
            {
                if(m_pFoundWnd && m_pFoundWnd != m_pFoundWnd && ::IsWindow(m_hFoundWnd))
                {
                    //m_pFoundWnd->Invalidate();
                    m_pFoundWnd->UpdateWindow();
                    m_pFoundWnd->FlashWindow(TRUE);
                    m_pFoundWnd->FlashWindow(FALSE);
                    //::SendMessage(m_hFoundWnd, WM_PAINT, NULL, NULL);
                }

                CRect WindowRect;
                m_pFoundWnd->GetWindowRect(&WindowRect);
                WindowRect.OffsetRect(-WindowRect.left, -WindowRect.top);
                m_pFoundWnd->GetDC()->FrameRect(WindowRect, &m_BlackBrush);

                m_strWndHandle.Format("%ld", m_hFoundWnd);

                // Get the class name
                char lpClassName[255];
                if(::GetClassName(m_hFoundWnd, lpClassName, 255))
                {
                    m_strWndClass = lpClassName;
                    m_strWndClass.MakeUpper();

                    char szText[255];
                    ::SendMessage(m_hFoundWnd, WM_GETTEXT, 255, (LPARAM)szText);
                    m_strWndName = szText;

                    /*if(m_strWndClass == "BUTTON")
                    {
                        //((CButton*)m_pFoundWnd)->GetBitmap();
                        HBITMAP hBmp = ::LoadBitmap(AfxGetApp()->m_hInstance, MAKEINTRESOURCE(IDB_BITMAP));
                        ((CButton*)m_pFoundWnd)->SetBitmap(::LoadBitmap(AfxGetApp()->m_hInstance, MAKEINTRESOURCE(IDB_BITMAP)));
                    }*/
                }
            }
            UpdateData(false);
        }
    }

    CDialog::OnMouseMove(nFlags, point);
}


void CInfiltratorDlg::OnSetWindowName()
{
    UpdateData(true);
    ::SendMessage(m_hFoundWnd, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)m_strWndName);
}