有点小问题，颜色不能交替变换
#include<windows.h>
#include<stdio.h>
#include<math.h>
LRESULT CALLBACK WinProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);
int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd
)
{
//定义一个窗口类
WNDCLASS wincls;
wincls.cbClsExtra=0;
wincls.cbWndExtra=0;
wincls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wincls.hCursor=LoadCursor(NULL,IDC_CROSS);
wincls.hIcon=LoadIcon(NULL,IDI_ERROR);
wincls.lpfnWndProc=WinProc;
wincls.lpszClassName="Lucky_wei";
wincls.lpszMenuName=NULL;
wincls.hInstance=hInstance;
wincls.style=CS_HREDRAW | CS_VREDRAW;
if(!RegisterClass(&wincls;))
{
MessageBox(NULL,"窗口类注册失败","注册窗口",NULL);
return 1;
}
//
//创建窗口 ，定义一个变量用来保存成功建立的窗口的句柄
HWND hwnd;
hwnd=CreateWindow("Lucky_wei","旋转小风车",WS_OVERLAPPEDWINDOW,0,0,600,600,NULL,NULL,hInstance,NULL);
if(!hwnd)
{
MessageBox(NULL,"创建窗口失败","创建窗口",NULL);
return 1;
}
//
//
//显示并更新窗口
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);
//
//
//定义消息结构体，实现消息循环
MSG msg;
while(GetMessage(&msg;,NULL,0,0))
{
TranslateMessage(&msg;);
DispatchMessage(&msg;);
}
return msg.wParam;
}
//
//
//
//编写窗口过程函数
LRESULT CALLBACK WinProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
int xogr,yogr,a,b,i;
float xbegin[3],ybegin[3],xend[3],yend[3];
HDC hDC;
PAINTSTRUCT ps;
HBRUSH hBrush;
HPEN hPen;
RECT clientRect;
COLORREF color[4]={RGB(255,0,0),RGB(0,255,0),RGB(0,0,255),RGB(255,255,255)};
int BrushStyle[3]={BLACK_BRUSH,GRAY_BRUSH,WHITE_BRUSH};
switch(uMsg)
{
case WM_PAINT:
hDC=BeginPaint(hwnd,&ps;);
GetClientRect(hwnd,&clientRect;);
xogr=clientRect.left+100;
yogr=clientRect.top+100;
a=xogr+200;
b=yogr+200;
xbegin[0]=400;
xbegin[1]=400-100*2.732;
xbegin[2]=xbegin[1];
ybegin[0]=b-100;
ybegin[1]=yogr;
ybegin[2]=400;
xend[0]=xbegin[1];
xend[1]=xbegin[2];
xend[2]=xbegin[0];
yend[0]=ybegin[1];
yend[1]=ybegin[2];
yend[2]=ybegin[0];
for(i=0;i<3;i++)
{
SelectObject(hDC,hPen);
hBrush=CreateSolidBrush(color[i]);
SelectObject(hDC,hBrush);
Pie(hDC,xogr,yogr,a,b,xbegin[i],ybegin[i],xend[i],yend[i]);
Sleep(100);
}
InvalidateRect(hwnd,NULL,1);
DeleteObject(hPen);
DeleteObject(hBrush);
EndPaint(hwnd,&ps;);
break;
case WM_TIMER:
if(wParam==1111)
InvalidateRect(hwnd,NULL,1);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束?","message",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
break;
}
return 0;
}
