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The device context is a standard handle to a device context. You need this for many drawing functions so that Microsoft Windows knows which window to draw in. For example, to draw a rectangle, you need to specify the device context.
HDC hdc;
::Rectangle( hdc, 1, 1, 100, 100);
The device context is specified by Windows Media Player through the Render function. Use this device context for any drawing tool that requires a device context.
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