如何用Win32 SDK编程创建Tri-pane HTML Help窗口

如何用Win32 SDK编程创建Tri-pane HTML Help窗口2010-01-09zxnHTML Help使用户能在一个帮助窗口中使用工具棒、查看目录和帮助主题。目前，有两种方法创建Tri-pane类型的HTML Help窗口：

使用HTML Help Workshop创建窗口

使用HTML Help API编程创建窗口

本文将介绍如何使用这两种方法创建Tri-pane HTML Help窗口。

使用预定义窗口

在HTML Help Workshop环境中很容易创建和修改工程的窗口定义，有关窗口定义的其它信息，请参考微软知识库文章：Q189084 HOWTO: Create a Tri-pane Window with HTML Help Workshop

本文假设在你的应用程序开发工具为 Visual C++，那么要在自己的程序中使用HTML Help帮助，必须借助于HTML Help提供的 API 函数；要调用这些 API 函数，就必须包含 htmlhelp.h 文件，并且将库文件 hhctrl.lib 或者 htmlhelp.lib 链接到自己的程序代码中。只要你安装了HTML Help Workshop环境，这些文件存放在 HTML Help Workshop下的 Include 和 Lib 目录中。

在下面的示范代码中，sample.chm是一个编译好的HTML Help帮助文件，其中有一个叫“mywindow”的窗口定义，下面的代码示范了如何在一个MFC程序中调用HTML Help API函数：

// CMainFrame message handler
  void CMainFrame::OnHelp（）
  {
   // display the topic "intro.htm" in the window defined
   // in the HTML Help Workshop
    HtmlHelp（m_hWnd,"sample.chm::\intro.htm>mywindow",
     HH_DISPLAY_TOPIC,0）;
  }

使用HTML Help API

为了创建three-pane窗口, 必须首先创建和填写HH_WINTYPE结构。HH_WINTYPE结构在HtmlHelp.h中定义,详细说明参见HTML Help Workshop文档。以下是一个例子:

Sample Code
  ///////////////////////////////////////////
  // Create an HH_WINTYPE structure.
  {
    HH_WINTYPE m_hhWinType;
    // Initialize all structure members to zero.
    ZeroMemory（&m_hhWinType, sizeof（HH_WINTYPE））;
    // Define a custom message for use with idNotify.
    // You are responsible for ensuring that this ID
    // does not conflict with other Windows/MFC messages.
    #define IDD_HELPTAB 69999
    // Set the size of the structure.
     m_hhWinType.cbStruct = sizeof（HH_WINTYPE）;
    // Set up the properties of the HTML window:
    // tripane window, sync topic with index/TOC, and so forth.
    // NOTE: fsValidMembers - HHWIN_PARAM_PROPERTIES must be set.
    m_hhWinType.fsWinProperties = HHWIN_PROP_TRI_PANE |
    HHWIN_PROP_AUTO_SYNC;
    // Put BACK, HOME, FORWARD, and EXPAND buttons on toolbar pane.
    // NOTE: fsValidMembers - HHWIN_PARAM_TB_FLAGS must be set.
    m_hhWinType.fsToolBarFlags = HHWIN_BUTTON_BACK |
     HHWIN_BUTTON_HOME | HHWIN_BUTTON_FORWARD |
     HHWIN_BUTTON_EXPAND;
    // The file is in the right pane. The full path is not needed.
    m_hhWinType.pszFile = "intro.htm";
    // Full Paths or CHM locations of various files （if used）.
    // To specify that a file is within a CHM, use the following
    // syntax: "CHMFileName.chm::\FileName.xxx"
    // Home Page:
     m_hhWinType.pszHome = "c:\mypath\intro.htm";
    // Table of Contents:
    m_hhWinType.pszToc = "c:\mypath\contents.hhc";
     // Index:
    m_hhWinType.pszIndex = "c:\mypath\index.hhk";
     // Expansion width of navigation pane （left pane）:
    // NOTE: fsValidMembers - HHWIN_PARAM_NAV_WIDTH must be set.
    m_hhWinType.iNavWidth = 175;
    // Initial display state:
    // NOTE: fsValidMembers - HHWIN_PARAM_SHOWSTATE must be set.
    m_hhWinType.nShowState = SW_RESTORE;
    // TOC should be activated.
    // NOTE: fsValidMembers - HHWIN PARAM_CUR_TAB must be set.
     m_hhWinType.curNavType = HHWIN_NAVTYPE_TOC;
    // Tabs on top.
    // NOTE: fsValidMembers - HHWIN_PARAM_TABPOS must be set.
    m_hhWinType.tabpos = HHWIN_NAVTAB_TOP;
    // ID to use in WPARAM in WM_NOTIFY:
    m_hhWinType.idNotify = IDD_HELPTAB;
    // Title of Help Window:
    m_hhWinType.pszCaption= "My Title";
    // Indicate which fields in structure are valid.
    m_hhWinType.fsValidMembers = HHWIN_PARAM_STYLES |
     HHWIN_PARAM_PROPERTIES | HHWIN_PARAM_RECT |
    HHWIN_PARAM_TB_FLAGS | HHWIN_PARAM_NAV_WIDTH |
    HHWIN_PARAM_SHOWSTATE | HHWIN_PARAM_TABPOS |
     HHWIN_PARAM_CUR_TAB;
    // Specify the name of the window definition.
     m_hhWinType.pszType = "MyWindowName";
    // This call creates the new type from the values in
    // the HH_WINTYPE structure. This example assumes that
    // a valid CHM file, "sample.chm", exists.
    HtmlHelp （m_hWnd, "c:\mypath\sample.chm",
     HH_SET_WIN_TYPE, （DWORD） &m_hhWinType）;
  }
  // Display the default topic in the window that was defined above
  // MFC""s CFrameWnd::OnHelp message handler.
  void CMainFrame::OnHelp（）
  {
  HtmlHelp（m_hWnd, "sample.chm>MyWindowName",
  HH_DISPLAY_TOPIC,0）;
  }