演示直接采集图像到计算机屏幕（显存）。

采集图像显示的位置可为计算机屏幕窗口任意位置。注意区分视频输入窗口（Input Window）、输出窗口（Output Window）以及显示窗口（Display Window）的概念。-Demonstrate capture images directly to a computer screen (memory). Collection location for the image display window anywhere on the computer screen. Note distinction between the video input window (Input Window), the output window (Output Window) and the display window (Display Window) concept.