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<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">法可以和其它普通</span>.DLL<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">函数一样有三种：</span></font></p>
<p class="MsoNormal"><font color="#000000">1.<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">在</span>DEF<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">定义文件中直接用函数名或序号说明：</span></font></p>
<p class="MsoNormal"><font color="#000000">EXPORTS</font></p>
<p class="MsoNormal"><font color="#000000">WEP @1 RESIDENTNAME</font></p>
<p class="MsoNormal"><font color="#000000">InitHooksDll @2</font></p>
<p class="MsoNormal"><font color="#000000">InstallFilter @3</font></p>
<p class="MsoNormal"><font color="#000000">KeyboardProc @4</font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">用序号说明格式为：链接库名</font></span><font color="#000000">.<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">函数名</span>(<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">如本例中说明方法为</span>KEYDLL.KeyboardProc)<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">。</span></font></p>
<p class="MsoNormal"><font color="#000000">2.<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">在应用程序中利用函数直接调用：</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">首先在应用程序中利用</span>LoadLibrary(LPSTR "<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">链接库名</span>")<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">将动态链接库装入，并取得</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">装载库模块句柄</span>hInst,<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">然后直接利用</span>GetProcAddress(HINSTANCE
hInst,LPSTR "<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">函</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">数过程名</span>")<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">获取函数地址，然后直接调用该地址即可，程序结束前利用函数</span></font></p>
<p class="MsoNormal"><font color="#000000">FreeLibrary( )<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">释放装入的动态链接库即可。</span></font></p>
<p class="MsoNormal"><font color="#000000">3.<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">利用输入库</span>.LIB<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">方法</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">利用</span>IMPLIB.EXE<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">程序在建立动态链接库的同时建立相应的输入库</span>.LIB<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">，然后直接在</span></font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">项目文件中增加该输入库。</font></span></p>
<p class="MsoNormal"><font color="#000000"> <o:p> </o:p> </font> </p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">三、</font></span><font color="#000000">WINDOWS<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">挂钩监控函数的实现步骤</span></font></p>
<p class="MsoNormal"><font color="#000000">WINDOWS<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">挂钩函数只有放在动态链接库</span>DLL<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">中才能实现所有事件的监控功能。在</span>.DLL</font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">中形成挂钩监控函数基本方法及其基本结构如下：</font></span></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">１、首先声明</span>DLL<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">中的变量和过程；</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">２、然后编制</span>DLL<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">主模块</span>LibMain()<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">，建立模块实例；</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">３、建立系统退出</span>DLL<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">机制</span>WEP()<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">函数；</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">４、完成</span>DLL<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">初始化函数</span>InitHooksDll(),<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">传递主窗口程序句柄；</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">５、编制挂钩安装和下载函数</span>InstallFilter()<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">；</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">６、编制挂钩函数</span>KeyboardProc()<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">，在其中设置监控功能，并确定继续调下一个钩</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">子函数还是直接返回</span>WINDOWS<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">应用程序。</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">７、在</span>WINDOWS<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">主程序中需要初始化</span>DLL<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">并安装相应挂钩函数，由挂接的钩子函数负</span></font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">责与主程序通信；</font></span></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">８、在不需要监控时由下载功能卸掉挂接函数。</font></span></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">四、</span>WINDOWS<span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">下键盘挂钩监控函数的应用技术</span></font></p>
<p class="MsoNormal"><font color="#000000"> <o:p> </o:p> </font> </p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">目前标准的</font></span><font color="#000000">104 <span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">键盘上都有两个特殊的按键，其上分别用</span>WINDOW<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">程序徽标和鼠标下</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">拉列表标识，本文暂且分别称为</span>Micro<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">左键和</span>Micro<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">右键，前者用来模拟鼠标左键激</span></font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">活开始菜单，后者用来模拟鼠标右键激活属性菜单。这两个特殊按键只有在按下后</font></span></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">立即抬起即完成</span> CLICK<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">过程才能实现其功能，并且没有和其它按键进行组合使用。</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">由于</span>WINDOWS <span lang="ZH-CN" style="font-family:宋体;
mso-ascii-font-family:"Times New Roman"">系统中将按键划分得更加详细，使应用程序中很难灵活定义自己的专</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">用快捷键，比如在开发</span>.IME<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">等应用程序时很难找到不与</span>WORD8.0<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">等其它应用程序冲突</span></font></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">的功能按键。如果将标准</span>104<span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">键盘中的这两个特殊按键作为模拟</span>CTRL<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">和</span>ALT
<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">等专用按</span></font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">键，使其和其它按键组合，就可以在自己的应用程序中自由地设置专用功能键，为</font></span></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">应用程序实现各种功能快捷键提供灵活性。正常情况下</span>WINDOWS <span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">键盘事件驱动程序</span></font></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">并不将这两个按键的消息进行正常解释，这就必须利用键盘事件的挂钩监控函数来</font></span></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman""><font color="#000000">实现其特定的功能。其方法如下：</font></span></p>
<p class="MsoNormal"><font color="#000000"><span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:
"Times New Roman"">１、首先编制如下一个简单动态链接库程序，并编译成</span>DLL<span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">文件。</span></font></p>
<p class="MsoNormal"><font color="#000000">#include "windows.h"</font></p>
<p class="MsoNormal"><font color="#000000">int FAR PASCAL LibMain(HANDLE hModule,UINT wDataSeg,</font></p>
<p class="MsoNormal"><font color="#000000">UINT cbHeapSize,LPSTR lpszCmdLine);</font></p>
<p class="MsoNormal"><font color="#000000">int WINAPI WEP(int bSystemExit);</font></p>
<p class="MsoNormal"><font color="#000000">int WINAPI InitHooksDll(HWND hwndMainWindow);</font></p>
<p class="MsoNormal"><font color="#000000">int WINAPI InstallFilter(BOOL nCode);</font></p>
<p class="MsoNormal"><font color="#000000">LRESULT CALLBACK KeyHook(int nCode,WORD wParam,DWORD
lParam);</font></p>
<p class="MsoNormal"><font color="#000000">static HANDLE hInstance; // <span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">全局句柄</span></font></p>
<p class="MsoNormal"><font color="#000000">static HWND hWndMain; // <span lang="ZH-CN" style="font-family:
宋体;mso-ascii-font-family:"Times New Roman"">主窗口句柄</span></font></p>
<p class="MsoNormal"><font color="#000000">static int InitCalled=0; // <span lang="ZH-CN" style="font-family:宋体;mso-ascii-font-family:"Times New Roman"">初始化标志</span></font></p>
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