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color: rgb(255,255,255)" href="../os/H00705-2.htm">操作系统</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="../image/H00705-14.htm">图像处理</a></strong><br> <font color="#ff0000"><b><br> </b></font><strong><a style="color: rgb(255,255,255); text-decoration: none" href="../autoCAD/H00705-19.htm">辅助设计</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="../data/H00705-18.htm">数 据 库</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="H00706-1.htm">高级编程</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="../netuse/H00705-20.htm">网络应用</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="../webpage/H00705-21.htm">网页制作</a></strong><br> <br> <strong><a style="color: rgb(255,255,255); text-decoration: none" href="../technic/H00706-3.htm">技术交流</a></strong></p> <div align="center"><center><table border="0" cellPadding="0" cellSpacing="0" width="100%"><tbody></tbody> </table> </center></div><table border="0" cellPadding="0" cellSpacing="0" width="100%"><tbody></tbody> </table> </td> <td align="middle" vAlign="top" width="20"><p align="left" class="content4"><span class="font"><span><br> </span></span></td> <td colSpan="2" vAlign="top" width="400"> <font SIZE="2"><p align="center">C++Builder如何响应消息及自定义消息</p> <p>Inprise(Borland) C++Builder中，可以象在Delphi中一样响应消息，</p> <p>只是看起来要稍复杂一点。 </p> <p>对于系统已定义的消息，可以直接响应： </p> <p>#define WM_MY_OPEN_CMDLINE_FILE (WM_USER+1) //进程间通讯的自定义消息 </p> <p>#define WM_MY_SEARCH_NODE (WM_USER+2) //查找命令的自定义消息 </p> <p>class TSomeForm : public TForm </p> <p>{ </p> <p>//...类中的其它代码 </p> <p>protected: </p> <p>//消息的响应过程 </p> <p>void __fastcall OpenCmdLineFile(TMessage Message); </p> <p>void __fastcall SearchDocumentNode(TMessage Message); </p> <p>void __fastcall GetWindowMinMaxInfo(TWMGetMinMaxInfo Message); </p> <p>//以下通过宏定义实现消息的正确响应 </p> <p>BEGIN_MESSAGE_MAP </p> <p>MESSAGE_HANDLER(WM_MY_OPEN_CMDLINE_FILE, TMessage, OpenCmdLineFile) </p> <p>MESSAGE_HANDLER(WM_MY_SEARCH_NODE, TMessage, SearchDocumentNode) </p> <p>MESSAGE_HANDLER(WM_GETMINMAXINFO , TWMGetMinMaxInfo, GetWindowMinMaxIn </p> <p>fo) </p> <p>END_MESSAGE_MAP(TForm) </p> <p>};//end class </p> <p>//以下为实现代码 </p>⌨️ 快捷键说明
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