Call this member function to retrieve the help contextidentifier, if any, associated with the window.
调用这个函数以获得与窗口相关的帮助上下文标识符,如果有的话。
2
Likewise, if an owned window does not have a help contextidentifier, it inherits the identifier of its owner window.
如果子窗口不具有帮助上下文标识符,则它继承它的父窗口的标识符。
3
Retrieves the librarys documentation string, the complete help file name and path, and the contextidentifier for the library help topic in the help file.