让“红叉”不起作用，Visual C++.NET禁止窗口标题栏右侧的关闭按钮，让其变成灰色不可用状态，鼠标移上也不起作用了，大家知道每打工一个窗口，在任务栏处也有显示，也可以关闭它，但经过本代码的处理后，在任务栏处也不能关闭窗口了，那怎么关闭呢？别着急，按键盘上的组合键“Alt+F4”就可关闭了。-Let the " red cross"　does not work, Visual C++.NET barred window close button in the title bar on the right, allowed to become grayed state, move the mouse does not work, and we know that every wage a window in the task also shown at the bar, or you can turn it off, but after the code is processed in the task bar at the window can not be closed, then how close it? Do not worry, press the keyboard key combination " Alt+F4"　can be closed.