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Asked: 2026-05-11T01:43:46+00:00

I am developing an application for video recording and I want to overlay the

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I am developing an application for video recording and I want to overlay the video preview with a logo and recording timer.

I tried to run the full-screen application and everything worked fine. Then I tried to run the application as a regular Windows application and it returned an error.

Could anyone take a look at the code below if there’s a way to modify it to run the application as a regular Windows app?

HRESULT CViewfinderRenderer::OnStartStreaming() {   HRESULT hr = S_OK;   DDSURFACEDESC ddsd;    m_pDD = NULL;    //full screen settings   hr = DirectDrawCreate(NULL, &m_pDD, NULL);   hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_FULLSCREEN);    ddsd.dwSize = sizeof(ddsd);    ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;    ddsd.ddsCaps.dwCaps = DDSCAPS_FLIP | DDSCAPS_PRIMARYSURFACE;   ddsd.dwBackBufferCount = 1;    //end full screen settings    //normal settings   /*hr = DirectDrawCreate(NULL, &m_pDD, NULL);   hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_NORMAL);    ddsd.dwSize = sizeof(ddsd);   ddsd.dwFlags = DDSD_BACKBUFFERCOUNT;   ddsd.dwBackBufferCount = 1;*/   //end normal settings    hr = m_pDD->CreateSurface(&ddsd, &m_pSurface, NULL);   if (hr != DD_OK) {     return hr;   }    // Get backsurface   hr = m_pSurface->EnumAttachedSurfaces(&m_pBackSurface, EnumFunction);    return S_OK; }
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1 Answer

  1. Even when running windowed, you need to create a primary surface, only it is not a flippable surface. 

     //full screen settings  hr = DirectDrawCreate(NULL, &m_pDD, NULL);  hr = m_pDD->SetCooperativeLevel(m_hWnd, DDSCL_NORMAL);   ddsd.dwSize = sizeof(ddsd);   ddsd.dwFlags = DDSD_CAPS;   ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

    Besides of creating a surface, most likely you will want to create a clipper for the window. For a complete sample see paragraph Running windowed in this GameDev article.

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