VC源码实现禁用窗口右上角的最大化、最小化以及关闭按钮，禁止关闭窗口，除此之外没有别的功能，只是把禁止、允许窗口右上角的控制按钮 ，像最大化、最小化、关闭按钮，可以恢复这些按钮的功能。-VC source code to disable the upper-right corner of the window to maximize, minimize and close buttons to prohibit close the window, in addition to no other, but the prohibition, allowing the upper-right corner of the window control buttons, such as maximize, minimize, close button, you can restore the functions of these buttons.