请帮我看看这个程序，为什么运行后任务管理器中程序在运行，而窗口却显示不出来

[txwyygbm]

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

long WINAPI WndPorc(HWND hWnd,UINT Message,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);
POINT lpSin[100];

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
WNDCLASS WndClass;
WndClass.cbClsExtra=0;
WndClass.cbWndExtra=0;
WndClass.hbrBackground=(HBRUSH)(GetStockObject(WHITE_BRUSH));
WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
WndClass.hIcon=LoadIcon(NULL,"END");
WndClass.hInstance=hInstance;
WndClass.lpfnWndProc=WndPorc;
WndClass.lpszClassName="WinFill";
WndClass.lpszMenuName=NULL;
WndClass.style=CS_HREDRAW|CS_VREDRAW;//窗口类属性

if(!RegisterClass(&WndClass))
{MessageBeep(0);return FALSE;}

HWND hWnd;
hWnd=CreateWindow
("SIN", //窗口类名
"正弦",//标题名
WS_OVERLAPPEDWINDOW,
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++)
{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);
DispatchMessage(&Message);
}
return 0;
}

long WINAPI WndPorc(HWND hWnd,UINT Message,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(Message)
{case WM_PAINT: //处理绘图信息
hDC=BeginPaint(hWnd,&PtStr); //获得设备环境指针
SetWindowOrgEx(hDC,-200,-200,NULL);
hPen=CreatePen(PS_DASH,1,RGB(255,0,0));
SelectObject(hDC,hPen);
Polyline(hDC,lpSin,100); //绘制正弦曲线


if(i<=25)
{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)
{hPen=CreatePen(PS_DASH,1,RGB(0,255,0));
hBrush=CreateHatchBrush(HS_BDIAGONAL,RGB(0,255,0));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);//计算半径
}

else if(i<=75)
{hPen=CreatePen(PS_DASH,1,RGB(0,0,255));
hBrush=CreateHatchBrush(HS_BDIAGONAL,RGB(0,0,255));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);//计算半径
}

else if(i<=100)
{hPen=CreatePen(PS_DASH,1,RGB(255,255,0));
hBrush=CreateHatchBrush(HS_BDIAGONAL,RGB(255,255,0));
lRadious=(long)(dfRange*0.2+i%25*dfRange*0.4/25);//计算半径
}

SelectObject(hDC,hBrush);
SelectObject(hDC,hPen);
lCentreX=lpSin[i].x;
lCentreY=lpSin[i].y;
Ellipse(hDC,lCentreX-lRadious,lCentreY-lRadious,lCentreX+lRadious,lCentreY+lRadious);

i++;
DeleteObject(hPen);
DeleteObject(hBrush);
EndPaint(hWnd,&PtStr);
Sleep(100);
if(i<100) InvalidateRect(hWnd,NULL,1);
return 0;
break;



case WM_DESTROY:PostQuitMessage(0);break;


default:return(DefWindowProc(hWnd,Message,wParam,lParam));
}
return 0;
}

哪里出错了？请高手指教。

[txwyygbm]

晕了，居然这里出错没看出来，谢了。

[believefym]

呵呵，楼主大意了

[txwyygbm]

昨晚太困了，怎么看都看不出来呵

[hurryboylqs]

你已经注册了的窗口类没用上啊，把CreateWindow中窗口类名改成WinFill！这样才能显示出来啦

[snowbirdfly]

同意楼上~~
WndClass.lpszClassName="WinFill";
和hWnd=CreateWindow
("SIN", //窗口类名
不一致~~~