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            </SPAN>07F2H</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">的尺寸為：</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: 宋體; 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: 宋體; 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: 宋體; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">對應的</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt">32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">位線性地址為</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: 黑體">3．<SPAN 
            style="FONT: 7pt 'Times New Roman'">&nbsp; </SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 黑體; FONT-SIZE: 12pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">動態修改</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: 黑體">Windows</SPAN><SPAN 
            style="FONT-FAMILY: 黑體; FONT-SIZE: 12pt; mso-ascii-font-family: Arial; mso-bidi-font-size: 10.0pt">內核</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">如前所述，</SPAN><SPAN 
            lang=EN-US>Windows95</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">不是一個“純”</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位操作系統，其內核模塊中的</SPAN><SPAN 
            lang=EN-US>USER</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">均是用</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位代碼實現的。</SPAN><SPAN 
            lang=EN-US>USER32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">只是</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位的</SPAN><SPAN 
            lang=EN-US>USER.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位調用接口。因此，如果屏幕截獲程序用</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位代碼實現，則只能截獲</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位應用程序對</SPAN><SPAN 
            lang=EN-US>USER32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI32.DLL</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的調用，無法截獲</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位應用程序對</SPAN><SPAN 
            lang=EN-US>USER.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>GDI.EXE</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的調用，所以如果想截獲所有應用程序（包括</SPAN><SPAN 
            lang=EN-US>Windows95</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的桌面程序</SPAN><SPAN 
            lang=EN-US>Explorer</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">）中有關屏幕輸出的系統調用，則應該用</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位代碼實現屏幕截獲功能。這就是</SPAN><SPAN 
            lang=EN-US>LTW32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">為什么不是“純”</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位應用程序的原因。</SPAN><SPAN 
            lang=EN-US>LTW32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">主要截獲兩個系統調用</SPAN><SPAN 
            lang=EN-US>TextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>ExtTextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">，方法很簡單，把這兩個函數的頭五個字節修改為一個</SPAN><SPAN 
            lang=EN-US>JMP FAR </SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">指令，使得對這兩個函數的調用均轉向屏幕截獲程序。這就涉及到一個關鍵問題：動態修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的代碼。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">在傳統的</SPAN><SPAN 
            lang=EN-US>DOS</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">程序中，動態修改程序代碼無任何困難，但在</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">中則不然，因為在</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">中，代碼可被同一程序的多個實例（進程）共享，所以系統不允許應用程序動態的修改代碼。在</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位側，內存的可讀、寫屬性是與段選擇符聯系在一起的。段選擇符基本上可分為兩類：數據段選擇符和代碼段選擇符。前者可讀、可寫、不可執行；后者可讀、可執行、不可寫。</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">提供了這兩類段選擇符相轉換的系統調用。未公開的</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位系統調用</SPAN><SPAN 
            lang=EN-US>AllocCStoDSAlias()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">為給定的代碼段選擇符分配一個具有相同線性基址和尺寸的數據段別名（</SPAN><SPAN 
            lang=EN-US>DS Alias</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">）。通過</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">別名可以對給定的代碼段進行修改。</SPAN><SPAN 
            lang=EN-US>AllocCStoDSAlias()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; 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: 宋體; mso-ascii-font-family: Arial">調用參數為給定的代碼選擇符，調用成功時返回一個線性基址和尺寸均與原代碼選擇符相同的</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">別名。當不再使用此</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">別名時，要用系統調用</SPAN><SPAN 
            lang=EN-US>FreeSelector()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">把</SPAN><SPAN 
            lang=EN-US>DS</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">別名釋放掉。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">使用上述技術，就可實現動態修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">代碼，從而改變</SPAN><SPAN 
            lang=EN-US>GDI</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的系統調用</SPAN><SPAN 
            lang=EN-US>TextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">和</SPAN><SPAN 
            lang=EN-US>ExtTextOut()</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">的執行動作，實時地截獲屏幕輸出，為實現鼠標隨動翻譯提供可能。</SPAN></P>
            <P class=MsoNormal style="TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">把上述的</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位到</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位的形式替換、</SPAN><SPAN 
            lang=EN-US>32</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位代碼與</SPAN><SPAN 
            lang=EN-US>16</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">位代碼的數據交換、動態修改</SPAN><SPAN 
            lang=EN-US>Windows</SPAN><SPAN 
            style="FONT-FAMILY: 宋體; mso-ascii-font-family: Arial">內核等技術綜合應用在一起，配合單詞查找算法和詞組分析算法就可以實現鼠標隨動翻譯功能。</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>對該文的評論</FONT></TD>
    <TD align=middle>
      <SCRIPT src="CSDN_文檔中心_屏幕取詞核心內幕.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_文檔中心_屏幕取詞核心內幕.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 的機子你這個方法就完蛋了！！！ 
    <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_文檔中心_屏幕取詞核心內幕.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>請問那里可以看到源程序？ 
<BR></TD></TR></TBODY></TABLE><BR>
<DIV align=center>
<TABLE align=center bgColor=#cccccc border=0 cellPadding=2 cellSpacing=1 
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  <TR>
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color=#ffffff>我要評論</FONT></TH></TR></TBODY></TABLE></DIV>
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