| 术语 | createellipticrgn |
| 释义 | CreateEllipticRgn 语法： HRGN CreateEllipticRgn( __in int nLeftRect, __in int nTopRect, __in int nRightRect, __in int nBottomRect ); CreateEllipticRgn函数 该CreateEllipticRgn函数创建一个椭圆形区域。 参数 nLeftRect [in] 指定的x坐标逻辑单位，对椭圆边界矩形的左上角。 nTopRect [in] 指定的y的椭圆的边界矩形左上角的坐标逻辑单位。 nRightRect [in] 指定的x坐标按逻辑单位低，的椭圆的边界矩形右下角。 nBottomRect [in] 指定的y坐标下的逻辑单位的椭圆的边界矩形右下角。 返回值 如果函数成功，返回值是处理该地区。 如果函数失败，返回值为NULL。 备注 当您不再需要HRGN对象，调用DeleteObject函数将其删除。 阿边界矩形定义的大小，形状，以及该地区的方向：矩形的长边界定椭圆的长轴长度;的短边确定椭圆的短轴长度，以及矩形的中心定义相交的主要和次要轴线。 要求： 最低支持：client－Windows 2000专业版 最低支持server－Windows 2000服务器 HeaderWingdi.h(头文件：winuser.h) LibraryGdi32.lib DLLGdi32.dll 参见 地区概况 区域函数 CreateEllipticRegnIndirect DeleteObject SelectObject 如果有任何问题和意见，请发送给微软(wsddocfb@microsoft.com) 生成日期：2009年7月11日 ＝＝英文原文＝＝CreateEllipticRgn Function The CreateEllipticRgn function creates an elliptical region. Syntax HRGN CreateEllipticRgn( __in int nLeftRect, __in int nTopRect, __in int nRightRect, __in int nBottomRect ); Parameters nLeftRect [in] Specifies the x-coordinate in logical units, of the upper-left corner of the bounding rectangle of the ellipse. nTopRect [in] Specifies the y-coordinate in logical units, of the upper-left corner of the bounding rectangle of the ellipse. nRightRect [in] Specifies the x-coordinate in logical units, of the lower-right corner of the bounding rectangle of the ellipse. nBottomRect [in] Specifies the y-coordinate in logical units, of the lower-right corner of the bounding rectangle of the ellipse. Return Value If the function succeeds, the return value is the handle to the region. If the function fails, the return value is NULL. Remarks When you no longer need the HRGN object, call the DeleteObject function to delete it. A bounding rectangle defines the size, shape, and orientation of the region: The long sides of the rectangle define the length of the ellipse's major axis; the short sides define the length of the ellipse's minor axis; and the center of the rectangle defines the intersection of the major and minor axes. Requirements Minimum supported clientWindows 2000 Professional Minimum supported serverWindows 2000 Server HeaderWingdi.h (include Windows.h) LibraryGdi32.lib DLLGdi32.dll See Also Regions Overview Region Functions CreateEllipticRegnIndirect DeleteObject SelectObject Send comments about this topic to Microsoft Build date: 7/11/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/dd183496(VS.85).aspx\n |
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