C / C++ / MFC

CRect rectWorkArea;

rectWorkArea.left   = 0;
rectWorkArea.top    = 0;
rectWorkArea.right  = ::GetSystemMetrics(SM_CXSCREEN);
rectWorkArea.bottom = ::GetSystemMetrics(SM_CYSCREEN);

SystemParametersInfo(SPI_SETWORKAREA,0,&rectWorkArea,SPIF_SENDCHANGE);

BOOL IsOutlookAppInstalled()
{
    HRESULT hr;
    IPOutlookApp* polApp;

    // Initialize COM for Outlook
    CoInitializeEx(NULL, 0);

    // Get the application object
    hr = CoCreateInstance(CLSID_Application, NULL, CLSCTX_INPROC_SERVER, IID_IPOutlookApp, (LPVOID*)&polApp);

    if (SUCCEEDED(hr))
    {
        // Release the COM interface
        polApp->Release();
    }

    // Uninitialize COM
    CoUninitialize();

    return (SUCCEEDED(hr) ? TRUE : FALSE);
}

CString str_err = "";
HRESULT ddrval = DD_OK;
DDSURFACEDESC2 ddsd;
int i = 0;

DDPIXELFORMAT ddpf = { sizeof(DDPIXELFORMAT), DDPF_RGB | DDPF_PALETTEINDEXED8,
    0, 8, 0xFF, 0xFF, 0xFF, 0}; // 8-bit B&W

// The overlay surface
//--------------------

// Try Overlay with double buffered complex overlay surface
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);

ddsd.ddsCaps.dwCaps     = DDSCAPS_OVERLAY | DDSCAPS_FLIP | DDSCAPS_COMPLEX | DDSCAPS_VIDEOMEMORY;
ddsd.dwFlags            = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_BACKBUFFERCOUNT | DDSD_PIXELFORMAT;
ddsd.dwWidth            = MAX_DST_OV_WIDTH;
ddsd.dwHeight           = MAX_DST_OV_HEIGHT;
ddsd.dwBackBufferCount  = 1;
ddsd.ddpfPixelFormat    = ddpf;

ddrval = lpDD->CreateSurface(&ddsd, &lpDDS_POVideo, NULL);
if(FAILED(ddrval))
{
    str_err.Format("We couldn't create an overlay flippable surface? Code error %.8xh", ddrval);
    MessageBox(str_err);
    return FALSE;
}

// Get a pointer to the backbuffer that we will later draw to
DDSCAPS2 caps;
caps.dwCaps = DDSCAPS_BACKBUFFER;
caps.dwCaps2 = caps.dwCaps3 = caps.dwCaps4 = 0;
ddrval = lpDDS_POVideo->GetAttachedSurface(&caps, &lpDDS_BOVideo);
if( FAILED(ddrval) )
{
    str_err.Format("lpDDS_POVideo->GetAttachedSurface failed with code %.8xh", ddrval);
    MessageBox(str_err);
    return FALSE;
}