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NewBie: DirectShow query, seeing video loss during capture

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Hi All, I am new to DirectShow and currently working on a video capture application, I started with an available code from the net. I am currently facing a problem with video loss when I use Ctrl+Alt+del when I lock my PC. After I lock the PC the and unlock again, the video window goes blank. I tried playing with IMediaEvent and VideoWindow functions but in vain. Can anyone help me in understading the role of ctrl+alt+del and what event is notified to the rendering window? Thank you Regards [Edited by - psash on July 10, 2008 12:32:45 AM]

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