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<TD width="95%" height=29><PRE><A name=_Toc419881628><SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: MS Sans Serif; mso-bookmark: _Toc419740446"><B>三 深入<SPAN lang=EN-US>MFC类库</SPAN></B></SPAN></A></PRE></TD>
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<P style="mso-line-height-alt: 1.3pt"><A name=_Toc419881629><SPAN
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style="mso-bidi-font-size: 10.0pt; mso-hansi-font-family: MS Sans Serif; mso-bookmark: _Toc419740447">1
处理用户输入</SPAN></A><SPAN lang=EN-US
style="FONT-SIZE: 18pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: Arial"><O:P>
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style="WORD-BREAK: break-all; TEXT-INDENT: 1cm; mso-line-height-alt: 1.3pt; mso-layout-grid-align: none; punctuation-wrap: simple"><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">程序从用户那里得到数据，经过自己的处理，再把计算的结果输出到屏幕、打印机或者其他的输出设备上，这是软件工作的基本模型。消息和键盘消息是最基本的输入信息，除此之外，</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">MFC</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">封装了一系列的使用户可以进行可视化的输入的界面对象，比方说对话框以及可以布置在上面的编辑框、按钮、列表控件、树形控件等等。使程序支持用户输入的手段更加丰富。</SPAN></P>
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name=_Toc419881630><SPAN lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: MS Sans Serif; mso-bookmark: _Toc419740448">1．1
定义对话框资源</SPAN></A></P>
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style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">下面我们通过一个例子来介绍如何设计一个基于对话框的界面，接受用户输入的数据，并且将它们以图形化的方式显示出来。我们将制作这样的一个有用的程序。它访问一个保存歌曲曲目的数据库，用户可以通过对话框让用户定义一个曲目表，并选定一张背景图，然后在一个没有系统菜单的窗口客户区上滚动显示曲目的名字。在许多的娱乐场所的大屏幕上我们都可以看到类似的东西。在这部分的内容当中，我们着重介绍如何获得和处理用户输入数据的工作，在后面的处理用户输出的内容当中，我们还将使用这个例子来说明如何在屏幕上进行输出工作。</SPAN><SPAN
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</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">下面我们来介绍如何</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">定义一个对话框资源。在</SPAN><SPAN
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style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">WORKSPACE</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">窗口当中</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">RESOURCE</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">一页，在<SPAN
lang=EN-US>DIALOG小图标上面单击鼠标右键，弹出菜单，选择</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">INSERT</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">命令<SPAN
lang=EN-US>,如图3.2所示：</SPAN></SPAN><BR style="mso-ignore: vglayout"
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align=center><SPAN style="mso-ignore: vglayout"><IMG height=326
src="book_text6.files/book_t2.jpg" width=435
v:shapes="_x0000_s1027"><BR></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">图3.2</SPAN></P>
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align=left> <SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">接下来在弹出的资源类型对话框中选择</SPAN><SPAN
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style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">，表</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">示添加一个对话框资源。单击</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">NEW</SPAN><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'MS Sans Serif'">按钮。</SPAN></P>
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