代码如下：

#include<windows.h>
#include<stdlib.h>
#include<string.h>
long WINAPI WndProc
(
HWND hWnd,
UINT iMessage,
UINT wParam,
LONG lParam
);
BOOL InitWindowsClass(HINSTANCE hInstance);
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow);
HWND hWndMain;
int WINAPI WinMain                //主函数
( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{    MSG Message;
if(!InitWindowsClass(hInstance))        return FALSE;
if(!InitWindows(hInstance,nCmdShow))    return FALSE;
while(GetMessage(&Message,0,0,0))    //消息循环
{   
TranslateMessage(&Message);
DispatchMessage(&Message);
}
return Message.wParam;
}
long WINAPI WndProc(HWND hWnd,UINT iMessage,
UINT wParam,LONG lParam) {
HDC hDC;          //定义指向设备的句柄
HBRUSH hBrush;      //定义指向画刷的句柄
HPEN hPen;        //定义指向画笔的句柄
PAINTSTRUCT PtStr;//定义指向包含绘图信息的结构体变量
switch(iMessage)                      //处理消息
{case WM_PAINT:                    //处理绘图消息
hDC=BeginPaint(hWnd,&PtStr);
SetMapMode(hDC,MM_ANISOTROPIC);      //设置映像模式
hPen=(HPEN)GetStockObject(BLACK_PEN);    //黑色画笔
hBrush=(HBRUSH)GetStockObject(DKGRAY_BRUSH); //画刷
SelectObject(hDC,hBrush);  //选择画刷
SelectObject(hDC,hPen);      //选择画笔
RoundRect(hDC,50,120,100,200,15,15); //绘制圆角矩形
hBrush=(HBRUSH)GetStockObject(LTGRAY_BRUSH);  //采用亮灰色画刷
SelectObject(hDC,hBrush);        //选择画刷
Ellipse(hDC,150,50,200,150);       //绘制椭圆
hBrush=(HBRUSH)GetStockObject(HOLLOW_BRUSH); //虚画刷
SelectObject(hDC,hBrush);        //选择画刷
Pie(hDC,250,50,300,100,250,50,300,50);      //绘制饼形
EndPaint(hWnd,&PtStr);      //结束绘图
return 0;
case WM_DESTROY:                 //结束应用程序
PostQuitMessage(0);    return 0;
default:                    //其他消息处理程序
return(DefWindowProc(hWnd,iMessage,wParam,lParam)) ;
}
}
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)//初始化窗口
{    HWND hWnd;
hWnd=CreateWindow("WinFill",  //生成窗口
"填充示例程序",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
0,
CW_USEDEFAULT,
0,
NULL,
NULL,
hInstance,
NULL);
if(!hWnd)    return FALSE;
hWndMain=hWnd;
ShowWindow(hWnd,nCmdShow);    //显示窗口
UpdateWindow(hWnd);
return TRUE;
}
BOOL InitWindowsClass(HINSTANCE hInstance)    //定义窗口类
{
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=WndProc;
WndClass.lpszClassName="WinFill";
WndClass.lpszMenuName=NULL;
WndClass.style=CS_HREDRAW|CS_VREDRAW;
return RegisterClass(&WndClass);
WndClass.hIcon=LoadIcon(NULL,"END");
WndClass.hInstance=hInstance;
WndClass.lpfnWndProc=WndProc;
WndClass.lpszClassName="WinFill";
WndClass.lpszMenuName=NULL;
WndClass.style=CS_HREDRAW|CS_VREDRAW;
return RegisterClass(&WndClass);
}