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Full Screen in DirectShow

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Hi Guys, Need help in resolving Fullscreen Video in Directshow. I am building graph for playing FlV files by adding appropriate filters. I am connecting all the filters by calling IGraphBuiler::Render(). In this case how can I render the output video in fullscreen? I found out that IVideowindow will b useful in this case. But its helpful only if we call IMediaControl::renderfile(/*Filename*/) without building our own graph. code snippet for your reference: //After adding all the filters pGraph->QueryInterface(IID_IVideoWindow, (LPVOID *)&pVideoWindow); pVideoWindow->put_FullScreenMode(OATRUE); //Getting the outpin of the source filter and connecting the filters in the whole graph IPin *pOutPin = 0; hr = GetOutPin(pSourceFilter, &pOutPin); hr = pGraph->Render(pOutPin); pOutPin->Release(); hr = pMediaControl->Run(); The above code is not working. Wud be helpeful on your input in this problem. Jeykumar S

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Here's an ancient piece of code of mine which should do what you want. I couldn't explain how it works anymore, because after mucking around with DShow I figured VfW was far more convenient and never looked back. Hopefully you can distill the information you need.

#pragma comment(lib, "strmiids.lib")
#pragma comment(lib, "quartz.lib")
#include <dshow.h>


int Video::Play(const std::string& pFile)
IGraphBuilder* pGraph = NULL;
IVideoWindow* pWin = NULL;
IMediaControl* pControl = NULL;
IMediaEvent* pEvent = NULL;
std::string _file = MEDIA_PATH + pFile;

// Initialize the COM library.
HRESULT hr = CoInitialize(NULL);
if (FAILED(hr)) return 1;

// Create the filter graph manager and query for interfaces.
hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph);
if (FAILED(hr)) return 1;

// Get interfaces
hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
hr = pGraph->QueryInterface(IID_IVideoWindow, (void **)&pWin);

// Build the graph.
size_t _size = mbstowcs(NULL, _file.c_str(), 0) + 2; // Add 2 for ZT
wchar_t* _wfile = new wchar_t[_size+2];
_size = mbstowcs(_wfile, _file.c_str(), _file.length()+1); // Add 1 for ZT
hr = pGraph->RenderFile(_wfile, NULL);
delete[] _wfile;

pWin->put_WindowStyle(WS_CHILD | WS_CLIPSIBLINGS);

DWORD _left = DXCore::ScreenInfo.left;
DWORD _top = DXCore::ScreenInfo.top;
pWin->SetWindowPosition(_left, _top, DXCore::ScreenInfo.width, DXCore::ScreenInfo.height);

if (SUCCEEDED(hr))
// Run the graph.
hr = pControl->Run();
if (SUCCEEDED(hr))
// Wait for completion.
long evCode;
pEvent->WaitForCompletion(INFINITE, &evCode);

return 0;

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Hey Thanks your reply man.. but unfortunately its not working with my case :(. Even this renders the media file by calling RenderFile(). But in my case I am building my own graph.
I didnt get the DXCore Base in your code!!! It just tries to fill the Video in the entire window of the Handle given. But I couldnt figure out how to bring full screen????

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