api函数: 代码如下:1.[DllImport(“user32.dll”)]//取设备场景 2.private static extern IntPtr GetDC(IntPtr hwnd);//返回设备场景句柄 3.[DllImport(“gdi32.dll”)]//取指定点颜色 4.private static extern int GetPixel(IntPtr hdc, Point p);主要方法: 代码如下:Timer tim = new Timer(); tim.Interval = 1; tim.Tick += delegate { Point p = new Point(M