（1）用Word编辑好帮助文档，并保存为网页格式，如mhtml格式。
（2）用EasyCHM软件生成chm文档。生成方法很简单的，相信你能很快搞定的！当然用其它方法制作CHM文档也可以了。
（3）在MFC中添加一个菜单或按钮，添加相应的响应函数。
（4）在函数体内用 ShellExecute(NULL,"open",".\\help.chm",NULL,NULL,SW_SHOWMAXIMIZED);
说明：\\help.chm 为文件路途和文件名，\\为当前目录
SW_SHOWMAXIMIZED 为最大化文档窗口，参考MSDN，还有如下一些参数可选：
| SW_HIDE | Hides the window and activates the executable file. | |
| SW_MAXIMIZE | Maximizes the window. | |
| SW_MINIMIZE | Minimizes the window. The next top-level window in the Z-order is activated. | |
| SW_RESTORE | Activates the window even if it is hidden or minimized | |
| SW_SHOW | Activates the window and displays it in its original size and at its original position. | |
| SW_SHOWMAXIMIZED | Activates the window. The window is displayed as maximized. | |
| SW_SHOWMINIMIZED | Activates the window. The window is displayed as minimized. | |
| SW_SHOWMINNOACTIVE | Activates the window as minimized. The active window retains the focus. | |
| SW_SHOWNA | Activates the window in its current state but the active window retains the focus. | |
| SW_SHOWNOACTIVATE | Displays the window in its most recent size and in its most recent position. The active window retains the focus. | |
| SW_SHOWNORMAL | Displays the window in its original size and at its original position. | |