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            </SPAN>07F2H</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">的尺寸为：</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt">4000H</SPAN></P>
            <P class=MsoNormal style="MARGIN-LEFT: 42.5pt"><SPAN 
            style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">∵</SPAN><SPAN 
            lang=EN-US style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt"> 
            82F41300H + 1234H = 82F42534</SPAN></P>
            <P class=MsoNormal style="MARGIN-LEFT: 42.5pt"><SPAN 
            style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">∴</SPAN><SPAN 
            style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt"> </SPAN><SPAN 
            style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">对应的</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt">32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">位线性地址为</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt">28:82F42534H</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; mso-list: l31 level1 lfo7; tab-stops: list 18.0pt"><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 黑体">3．<SPAN 
            style="FONT: 7pt 'Times New Roman'">&nbsp; </SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 黑体; FONT-SIZE: 12pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">动态修改</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 黑体">Windows</SPAN><SPAN 
            style="FONT-FAMILY: 黑体; FONT-SIZE: 12pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">内核</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">如前所述，</SPAN><SPAN 
            lang=EN-US>Windows95</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">不是一个“纯”</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位操作系统，其内核模块中的</SPAN><SPAN 
            lang=EN-US>USER</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">均是用</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位代码实现的。</SPAN><SPAN 
            lang=EN-US>USER32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">只是</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位的</SPAN><SPAN 
            lang=EN-US>USER.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位调用接口。因此，如果屏幕截获程序用</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位代码实现，则只能截获</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位应用程序对</SPAN><SPAN 
            lang=EN-US>USER32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的调用，无法截获</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位应用程序对</SPAN><SPAN 
            lang=EN-US>USER.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的调用，所以如果想截获所有应用程序（包括</SPAN><SPAN 
            lang=EN-US>Windows95</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的桌面程序</SPAN><SPAN 
            lang=EN-US>Explorer</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">）中有关屏幕输出的系统调用，则应该用</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位代码实现屏幕截获功能。这就是</SPAN><SPAN 
            lang=EN-US>LTW32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">为什么不是“纯”</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位应用程序的原因。</SPAN><SPAN 
            lang=EN-US>LTW32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">主要截获两个系统调用</SPAN><SPAN 
            lang=EN-US>TextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>ExtTextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">，方法很简单，把这两个函数的头五个字节修改为一个</SPAN><SPAN 
            lang=EN-US>JMP FAR </SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">指令，使得对这两个函数的调用均转向屏幕截获程序。这就涉及到一个关键问题：动态修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的代码。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">在传统的</SPAN><SPAN 
            lang=EN-US>DOS</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">程序中，动态修改程序代码无任何困难，但在</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">中则不然，因为在</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">中，代码可被同一程序的多个实例（进程）共享，所以系统不允许应用程序动态的修改代码。在</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位侧，内存的可读、写属性是与段选择符联系在一起的。段选择符基本上可分为两类：数据段选择符和代码段选择符。前者可读、可写、不可执行；后者可读、可执行、不可写。</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">提供了这两类段选择符相转换的系统调用。未公开的</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位系统调用</SPAN><SPAN 
            lang=EN-US>AllocCStoDSAlias()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">为给定的代码段选择符分配一个具有相同线性基址和尺寸的数据段别名（</SPAN><SPAN 
            lang=EN-US>DS Alias</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">）。通过</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">别名可以对给定的代码段进行修改。</SPAN><SPAN 
            lang=EN-US>AllocCStoDSAlias()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的使用方法如下：</SPAN></P>
            <P class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN lang=EN-US>WORD 
            (FAR PASCAL *AllocCStoDSAlias)(WORD);</SPAN></P>
            <P class=MsoNormal style="MARGIN-LEFT: 18pt"><SPAN 
            lang=EN-US>AllocCStoDSAlias = GetProcAddress(</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN-LEFT: 39.25pt; TEXT-INDENT: 3.25pt"><SPAN 
            lang=EN-US>GetModuleHandle(“KERNEL”), 
”ALLOCCSTODSALIAS”);</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">调用参数为给定的代码选择符，调用成功时返回一个线性基址和尺寸均与原代码选择符相同的</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">别名。当不再使用此</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">别名时，要用系统调用</SPAN><SPAN 
            lang=EN-US>FreeSelector()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">把</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">别名释放掉。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">使用上述技术，就可实现动态修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">代码，从而改变</SPAN><SPAN 
            lang=EN-US>GDI</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的系统调用</SPAN><SPAN 
            lang=EN-US>TextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>ExtTextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">的执行动作，实时地截获屏幕输出，为实现鼠标随动翻译提供可能。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">把上述的</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位到</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位的形式替换、</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位代码与</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">位代码的数据交换、动态修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial">内核等技术综合应用在一起，配合单词查找算法和词组分析算法就可以实现鼠标随动翻译功能。</SPAN></P><BR></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><BR>
<TABLE align=center bgColor=#006699 border=0 cellPadding=0 cellSpacing=0 
width=770>
  <TBODY>
  <TR bgColor=#006699>
    <TD align=middle bgColor=#006699 id=white><FONT 
    color=#ffffff>对该文的评论</FONT></TD>
    <TD align=middle>
      <SCRIPT src="CSDN_文档中心_屏幕取词核心内幕.files/readnum.htm"></SCRIPT>
    </TD></TR></TBODY></TABLE>
<TABLE align=center bgColor=#666666 border=0 cellPadding=2 cellSpacing=1 
width=770>
  <TBODY>
  <TR>
    <TD bgColor=#cccccc colSpan=3><SPAN style="COLOR: #cccccc"><IMG height=16 
      hspace=1 src="CSDN_文档中心_屏幕取词核心内幕.files/ico_pencil.gif" width=16> 
      </SPAN>&nbsp;&nbsp;&nbsp;&nbsp; dickzy <I>(2000-12-27 10:54:18)</I> </TD></TR>
  <TR>
    <TD bgColor=#ffffff colSpan=3 width=532><BR>如果不是intel 的机子你这个方法就完蛋了！！！ 
    <BR></TD></TR></TBODY></TABLE>
<TABLE align=center bgColor=#666666 border=0 cellPadding=2 cellSpacing=1 
width=770>
  <TBODY>
  <TR>
    <TD bgColor=#cccccc colSpan=3><SPAN style="COLOR: #cccccc"><IMG height=16 
      hspace=1 src="CSDN_文档中心_屏幕取词核心内幕.files/ico_pencil.gif" width=16> 
      </SPAN>&nbsp;&nbsp;&nbsp;&nbsp; a_fee <I>(2000-12-22 9:45:45)</I> </TD></TR>
  <TR>
    <TD bgColor=#ffffff colSpan=3 width=532><BR>请问那里可以看到源程序？ 
<BR></TD></TR></TBODY></TABLE><BR>
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