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<h2><span lang="EN-US">1.2<span style="mso-spacerun: yes"> </span></span><span style="font-family:仿宋_GB2312;mso-ascii-font-family:"Times New Roman"">示例</span></h2>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">本节给出了多个应用实例。</span><span lang="EN-US">1.2.1</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节介绍了如何在一个工作空间中包含多个工程；</span><span lang="EN-US">1.2.2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节演示了如何增加消息映射；</span><span lang="EN-US">1.2.3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节介绍了如何利用类向导关联成员变量；</span><span lang="EN-US">1.2.4</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节演示了一些调试技巧；</span><span lang="EN-US">1.2.5</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节演示了利用分隔窗口实现单文档多视图；</span><span lang="EN-US">1.2.6</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">节演示了如何实现多文档。</span></p>
<h3><span lang="EN-US">1.2.1<span style="mso-spacerun: yes"> </span></span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">新建工作空间</span></h3>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">本实例介绍了如何在一个工作空间中包含多个工程。</span></p>
<h4><span lang="EN-US">1</span><span style="font-family:黑体;mso-ascii-font-family:
"Times New Roman"">．实例说明</span></h4>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">一个大的商业软件有几十个甚至几百个模块，划分这么多模块的优点至少有以下几个。</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">）便于维护。修改错误或新增功能只需要修改少量模块。</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">）复用性强。大的软件一般包含一个主程序和若干个工具，工具可以独立运行，是主程序的补充或简化。它们的内核是相同的，模块化使得他们可以共用内核。</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">）便于移植。由于与环境交互的部分都封装在对应模块中，环境变了，只需要修改对应的模块。举个例子，某软件以前只支持</span><span lang="EN-US">Access</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">数据库，现在要支持</span><span lang="EN-US">Oracle</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">，只需要修改与数据库交互的那个模块。</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">4</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">）便于分工协作。如果模块划分得不好，一个程序员无意中犯的错误，可能会导致其他程序员无法工作。</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">一般而言，一个模块对应一个工程，在新建工程时，会自动生成一个工作空间。如果想一个工作空间包含几个工程，可以用下面的方法。</span></p>
<h4><span lang="EN-US">2</span><span style="font-family:黑体;mso-ascii-font-family:
"Times New Roman"">．实现</span></h4>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">下面的这个例子，演示如何让一个工作空间包含两个工程。具体步骤如下：</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）建立一个文件夹存放代码，如</span><span lang="EN-US">G:\VCBook</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">。</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）启动</span><span lang="EN-US">VC 6.0</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，选择菜单“</span><span lang="EN-US">File</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">→</span><span lang="EN-US">New</span><span style="font-family:
楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”命令打开“</span><span lang="EN-US">New</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”对话框，选择“</span><span lang="EN-US">Workspace</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”属性卡。在“</span><span lang="EN-US">Locatin</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”编辑框中输入</span><span lang="EN-US">Ex010201</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，在“</span><span lang="EN-US">Workspaces
name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”编辑框中输入</span><span lang="EN-US">Ex010201</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，如图</span><span lang="EN-US">1-38</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">所示。单击“</span><span lang="EN-US">OK</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”按钮，完成新建工作空间。</span></p>
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<p class="a0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">图</span><span lang="EN-US">1-38<span style="mso-spacerun: yes">
</span></span><span style="font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">新建工作空间</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">3</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）在</span><span lang="EN-US">Workspace</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">窗口的工作空间（</span><span lang="EN-US">Workspace</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）名上单击鼠标右键（如图</span><span lang="EN-US">1-39</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">所示），在弹出的快捷菜单上选择“</span><span lang="EN-US">Add
New Project to Workspace</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”命令。</span></p>
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<p class="a0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">图</span><span lang="EN-US">1-39
</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">增加工程</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">4</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）在弹出的对话框的“</span><span lang="EN-US">Porject
name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”编辑框中输入</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">，双击工程类型中的“</span><span lang="EN-US">MFC
AppWizard</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）”，在弹出的“</span><span lang="EN-US">MFC
AppWizard</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">－</span><span lang="EN-US">Step
1</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”对话框中选择“</span><span lang="EN-US">Dialog
based</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”，直接单击“</span><span lang="EN-US">Finish</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”按钮完成新建工程。</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">5</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）单击“</span><span lang="EN-US">File View</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”标签页，进入</span><span lang="EN-US">File
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