PPC上调用摄像头，调用底层函数

Feature Area: Video capture Description: This sample provides the basic video capture functionalities: It captures and encodes video in a WMV file, and captures and encodes an image in a jpeg file. Usage: Build and deploy using Visual Studio 2005. Relevant APIs/Associated Help Topics: ICaptureGraphBUilder2 Assumptions: Your device needs to have a video capture driver installed (the emulator ships with a null capture driver). The video will be saved to the root of your device to "\video1 .asf". The still picture will be saved to "test.jpg" If you wish, you can change these hardcoded values in the code for the files to be saved to a different location. .asf". The still picture will be saved to "test.jpg" If you wish, you can change these hardcoded values in the code for the files to be saved to a different location.