类似输入法窗口的功能，会紧贴光标，不是鼠标指针~-similar input window function, the cursor will close, not mouse pointer ~

获取屏幕任意点的RGB值，两种方法获取鼠标当前窗口指针-Get the screen at any point in RGB values, two methods for the mouse pointer to the current window

在桌面显示Windows窗口。窗口内居中显示“大家好，这是我的第一个Windows API程序！”同时播放背景音乐，并可通过程序改变窗口显示风格为只有标题栏，以及鼠标指针形状为手型。-Windows desktop display window. Window centered Hello, everyone, this is my first Windows API program! While playing background music, and through the progr