怎么不显示窗口啊?

haz110 2008-09-26 08:36:35

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define Pi 3.1415926

long WINAPI WndProc(HWND hWnd,UINT iMessage,
UINT wParam,LONG lParam);
double dfTheta=0,dfRange=100.0; //正弦曲线的角度变量.
long i=0,j=0;
long lCentreX=0,lCentreY=0,lRadious=(long)(0.2*dfRange);
//定义圆心坐标和圆坐标.
POINT lpSin[100]; //定义正弦曲线的点坐标.
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state
)

{ WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
wndcls.hInstance=hInstance;
wndcls.lpfnWndProc=WndProc;
wndcls.lpszClassName="Weixin2003";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW | CS_VREDRAW;

if(!RegisterClass(&wndcls)) //注册窗口.
{ MessageBeep(0); return FALSE;}
HWND hWnd;

hWnd=CreateWindow
("SIN", //窗口类名.
"4_6", //标题名.
WS_OVERLAPPEDWINDOW, //带标题栏,最大/小按钮的窗口
CW_USEDEFAULT, //窗口左上角坐标.
0,
CW_USEDEFAULT, //采用缺省的宽度和高度.
0,
NULL, //无父窗口.
NULL, //无主菜单.
hInstance, //当前实例句柄.
NULL);
ShowWindow(hWnd,nCmdShow); //显示窗口.
UpdateWindow(hWnd); //更新并绘制用户区.

for(int j=0;j<100;j++) //生成正弦曲线的点坐标.
{
lpSin[j].x=(long)(j*2*Pi/100*60);
lpSin[j].y=(long)(dfRange*sin(j*2*Pi/100));
}
MSG Message;
while(GetMessage(&Message,0,0,0))
{
TranslateMessage(&Message); //消息循环.
DispatchMessage(&Message);
}
return Message.wParam;
}
long WINAPI WndProc(HWND hWnd,UINT iMessage,
UINT wParam,LONG lParam)
{
HDC hDC; //定义设备环境句柄.
HBRUSH hBrush; //定义画刷句柄
HPEN hPen; //定义画笔句柄
PAINTSTRUCT PtStr;//定义包含绘图信息的结构体变量
switch(iMessage)
{
case WM_PAINT: //处理绘图消息
hDC=BeginPaint(hWnd,&PtStr); //获得设备环境指针
SetWindowOrgEx(hDC,-200,-200,NULL); //设置原点坐标
hPen=CreatePen(PS_DASH,1,RGB(255,0,0)); //建新画笔
SelectObject(hDC,hPen); //选入画笔
Polyline(hDC,lpSin,100); //绘制正弦曲线
if(i<=25) //第一个1/4周期.
{ hPen=CreatePen(PS_DASH,1,RGB(255,0,0));
hBrush=CreateHatchBrush(HS_BDIAGONAL,RGB(255,0,0));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);//计算半径
}
else if(i<=50)//第二个1/4周期.
{ hPen=CreatePen(PS_DASH,1,RGB(0,255,0));
hBrush=CreateHatchBrush(HS_DIAGCROSS,RGB(0,255,0));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);
}
else if(i<=75)//第三个1/4周期.
{ hPen=CreatePen(PS_DASH,1,RGB(0,0,255));
hBrush=CreateHatchBrush(HS_CROSS,RGB(0,0,255));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);
}
else//第四个1/4周期.
{ hPen=CreatePen(PS_DASH,1,RGB(255,255,0));
hBrush=CreateHatchBrush(HS_VERTICAL,RGB(255,255,0));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);
}
SelectObject(hDC,hBrush); //选入画刷.
SelectObject(hDC,hPen); //选入画笔.
lCentreX=lpSin[i].x; //圆心x坐标.
lCentreY=lpSin[i].y; //圆心y坐标.
Ellipse(hDC,lCentreX-lRadious,lCentreY-lRadious,
lCentreX+lRadious,lCentreY+lRadious); //画圆
i++;
DeleteObject(hPen); //删除画笔
DeleteObject(hBrush); //删除画刷
EndPaint(hWnd,&PtStr); //删除设备环境指针
Sleep(100); //停0.1秒
if(i<100) InvalidateRect(hWnd,NULL,1); //刷新用户区
return 0;
case WM_DESTROY: //关闭窗口.
PostQuitMessage(0); return 0;
default:
return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}
}
上面这个程序怎么不显示窗口啊!缺什么函数了吗?

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