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惧留孙网 > 惧留孙课堂 > 在线手册 > WINDOWS API手册 > SetArcDirection
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SetArcDirection 函数

设置指定设备环境当前的弧到达方向。弧和矩形函数使用弧到达方向。
可通过 GetArcDirection 获取弧到达方向
 函数原型:
 int SetArcDirection ( HDC hdc,int ArcDirection  );
参数
hdc
类型:HDC
设备环境句柄。

ArcDirection
类型:int
新的弧到达方向,可用值如下:

AD_COUNTERCLOCKWISE:逆时针方向。
AD_CLOCKWISE          :顺时针方向。
返回值
类型:int
函数成功,返回以前的弧到达方向。
函数失败,返回0。
备注
默认弧到达方向是逆时针方向。
支持
最低桌面系统支持Windows 2000 Professional
头文件Wingdi.h (已包含在Windows.h中)
Gdi32.lib
DLLGdi32.dll

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