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PolyPolyline 函数
画出多串线，每串包含一条或多条直线。
函数原型：
BOOL PolyPolyline (
HDC hdc,POINT * lppt,DWORD * lpdwPolyPoints,DWORD cCount );
参数
hdc
类型：HDC
设备环境句柄。
lppt
lpdwPolyPoints
类型：DWORD *
一个数组，元素依次记录在lppt中每串线有几个点。点数必须大于等于2。
cCount
类型：DWORD
参数lpdwPolyPoints数组中元素个数。
返回值
类型：BOOL
如果成功，返回非0。
如果失败，返回0。
如果失败，返回0。
备注
无论PolyPolyline函数画出的点是否闭合，被画出的图形都不会被填充。
当前位置不会被PolyPolyline函数使用或改变。
当前位置不会被PolyPolyline函数使用或改变。
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) |
| 库 | Gdi32.lib |
| DLL | Gdi32.dll |
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