判断鼠标是否在焦点上，根据鼠标位置获得焦点，api开发-judge whether the focus of the mouse, the mouse position is based on focus api development

用C#设计一window是应用程序，要求能在屏幕上显示鼠标的当前位置并在鼠标移动的时候能实时显示。-Design is a Windows applications in c#, the requirement to the screen displays the current position of the mouse and can real-time display when the mouse moves.

颜色获取软件，可以获取鼠标所在位置的颜色所对应的RGB数值。(Color for software, can obtain the corresponding RGB values the color of the location of the mouse.)