book_text7.htm

深入编程内幕vc++ 非常适合处学者学习

            lang=EN-US 
            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">WM_TEXT</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'">坐标方式下面，坐标被映射到了像素，</SPAN><SPAN 
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            lang=EN-US 
            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">Y</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'">的值向下递增，并且可以通过调用</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">CDC</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'">的</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">SetViewpotOrg</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'">函数来改变坐标原点。下面的代码把屏幕映射方式设为</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">MM_TEXT</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'">方式，并且把坐标原点设在（</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">300</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'">，</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">300</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'">）处：</SPAN><SPAN 
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            </O:P></SPAN></P>
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">DC.SetMapMode(MM_TEXT);<O:P> 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">DC.SetViewportOrg(CPoint(300,300));<O:P> 
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            style="TEXT-INDENT: 20pt; mso-line-height-alt: 1.3pt"><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'">另外，</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">WINDOWS</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'">提供了一组非常重要的比例固定的映射方式，在这些映射方式下面，我们可以改变它的坐标原点，却无法改变它的比例因子。对于</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">MM_LOENGLISH</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'">映射方式，我们已经知道它的</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">X</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'">值是向右递减的，</SPAN><SPAN 
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            style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">Y</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'">的值是向下递减的，所有的固定比例的映射方式都遵循这一原则。它们的比例因子也各不相同。我们列表如下：</SPAN><SPAN 
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                <TD 
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                  <P class=MsoNormal style="mso-line-height-alt: 1.3pt"><SPAN 
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                  style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">0.001</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'">英寸</SPAN><SPAN 
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                  style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 10.0pt">0.1</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'">毫米</SPAN><SPAN 
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