📄 2_1_1.htm
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View</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">（文件视图）。重复步骤（</span><span lang="EN-US">2</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">），在弹出对话框的“</span><span lang="EN-US">Project
name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”中输入</span><span lang="EN-US">Ex010201Dll</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">dll</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 - 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">MFC
Extension DLL</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">（</span><span lang="EN-US">using shared MFC DLL</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">）”，如图</span><span lang="EN-US">1-40</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">所示，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"">”按钮完成创建新工程。</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">1-40<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"">新建扩展动态库</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">6</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）目前为止，已经新建了一个工作空间，包含两个工程。为了让</span><span lang="EN-US">Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">工程能够使用</span><span lang="EN-US">Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">中的内容，必须把它的输出路径调成一致。选择菜单“</span><span lang="EN-US">Project</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">→</span><span lang="EN-US">Settings</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”命令（或使用快捷键</span><span lang="EN-US">Alt
+ F7</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">），会弹出“</span><span lang="EN-US">Project
Settings</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”对话框。选中</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">工程，单击</span><span lang="EN-US">Link</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">标签，将“</span><span lang="EN-US">Output
file name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”编辑框中的内容改成“</span><span lang="EN-US">../_Debug/Ex010201Dll.dll</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”，如图</span><span lang="EN-US">1-41</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">所示。用同样的方法将“</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”的</span><span lang="EN-US">Output file name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">改成“</span><span lang="EN-US">../Debug/Ex010201Exe.exe</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”，单击“</span><span lang="EN-US">OK</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”按钮关闭“</span><span lang="EN-US">Project
Setting</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”对话框。</span></p>
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<img src="2_1_1.35.jpg" v:shapes="_x0000_i1027" width="432" height="284"></span></p>
<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">1-41<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"">设置输出路径</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">7</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）进入</span><span lang="EN-US">File View</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">视图，在“</span><span lang="EN-US">Ex010201Dll
files</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”上单击鼠标右键，在弹出的快捷菜单中选择“</span><span lang="EN-US">Set
as Active Project</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”命令，将</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">工程设为当前工程，如图</span><span lang="EN-US">1-42</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">所示。从“</span><span lang="EN-US">Build</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”菜单中选择</span><span lang="EN-US">Build
Ex010201Dll.dll</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">命令。将</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">设置成当前工程，从“</span><span lang="EN-US">Build</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”菜单中选择</span><span lang="EN-US">Execute</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">命令创建并运行</span><span lang="EN-US">Ex010201Exe.exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">。这时会在</span><span lang="EN-US">G:\VCBook\Ex010201\_Debug</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">文件夹产生</span><span lang="EN-US">Ex010201Exe.exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">和</span><span lang="EN-US">Ex010201Dll.dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">。</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">1-42
</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">设置当前活动工程</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">8</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）确保</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">是当前工程，从“</span><span lang="EN-US">Insert</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”菜单中选择“</span><span lang="EN-US">New
class</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”命令，会弹出“</span><span lang="EN-US">New
class</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”对话框，如图</span><span lang="EN-US">1-43</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">所示，在“</span><span lang="EN-US">Class
type</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”下拉列表框中选择</span><span lang="EN-US">Generic
Class</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，名称（</span><span lang="EN-US">Name</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）为</span><span lang="EN-US">CStudent</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，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。</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">1-43
</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">增加新类</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">9</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）为</span><span lang="EN-US">CStudent</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">类名前加</span><span lang="EN-US">__declspec(dllexport)</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">以便于</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">使用这个类。为</span><span lang="EN-US">CStudent</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">类加一个私有成员</span><span lang="EN-US">m_iAge</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，公有函数</span><span lang="EN-US">SetAge</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">。</span></p>
<p class="a5"><span lang="EN-US">Student.h</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">的关键代码如下：</span></p>
<p class="ac"><span lang="EN-US">class __declspec(dllexport) CStudent<span style="mso-spacerun: yes"> </span></span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US">public:</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>bool SetAge(int iAge);</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>CStudent();</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>virtual ~CStudent();</span></p>
<p class="ac"><span lang="EN-US">private:</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>int<span style="mso-tab-count:2">
</span>m_iAge ;</span></p>
<p class="ac"><span lang="EN-US">};</span></p>
<p class="MsoNormal"><span lang="EN-US">Student.cpp</span><span style="font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">的关键代码如下：</span></p>
<p class="ac"><span lang="EN-US">CStudent::CStudent()</span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US">}</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US">CStudent::~CStudent()</span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US">}</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US">bool CStudent::SetAge(int iAge)</span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>m_iAge = iAge ;</span></p>
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