win32 各种形状api

1.Rectangle //绘制矩形

BOOL Rectangle(
int x1,
int y1,
int x2,
int y2
);
BOOL Rectangle(
LPCRECT lpRect
);
Rectangle（hdc，int left,int top,int rigth,int buttom）;

2.Ellipse //椭圆
BOOL Rectangle(
int x1,
int y1,
int x2,
int y2
);
BOOL Rectangle(
LPCRECT lpRect
);
Ellipse(HDC hdc,int left,int top,int right,int buttom);
返回值 成功非零 否则为0.

3.RoundRect //带圆角的矩形

  BOOL RoundRect(

int x1,
int y1,
int x2,
int y2,
int x3,
int y3
);
BOOL RoundRect(
LPCRECT lpRect,
POINT point
);
RoundRect（HDC hdc,int left ,int top,int right , int buttom ,int weight ,int Hight）;
成功非0，否则为0.

4.Arc //弧
BOOL Arc(
int x1,
int y1,
int x2,
int y2,
int x3,
int y3,
int x4,
int y4
);
BOOL Arc(
LPCRECT lpRect,
POINT ptStart,
POINT ptEnd
);
Arc(HDC hdc,int left,int top,int right,int buttom ,int x3,int y3,int x4,int y4 );
（x3，y3）为起始点 ，（x4，y4）为终点（并不一定在弧上）。
弧不封闭。

5.Chord //带弦弧
BOOL Chord(
int x1,
int y1,
int x2,
int y2,
int x3,
int y3,
int x4,
int y4
);
BOOL Chord(
LPCRECT lpRect,
POINT ptStart,
POINT ptEnd
);
参数和Arc相同 ，比Arc多一条弦，构成封闭图形。

6.Pie //扇形

  BOOL Pie(

int x1,
int y1,
int x2,
int y2,
int x3,
int y3,
int x4,
int y4
);
BOOL Pie(
LPCRECT lpRect,
POINT ptStart,
POINT ptEnd
);
参数和Arc，Chord相同，由弧和起始线加终线构成封闭图形。

举例：

case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);

        //矩形
        Rectangle(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4); 
        //椭圆
        Ellipse(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4);    
        //棱角为弧的矩形
        RoundRect(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4, cxClient / 8, cyClient / 8);     
        //弧
        Arc(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4,cxClient/2,0,0,cyClient/2);      
        //带弦弧
        Chord(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4, cxClient / 2, 0, 0, cyClient / 2);
        //扇形
        Pie(hdc, cxClient / 4, cyClient / 4, cxClient * 3 / 4, cyClient * 3 / 4, cxClient / 2, 0, 0, cyClient / 2);

        EndPaint(hwnd, &ps);
        return 0;