源代码如下：
#include<windows.h>
#include<stdio.h>

LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);


int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
    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.lpszClassName="weixin2008";
    wndcls.lpszMenuName=NULL;
    wndcls.style=CS_HREDRAW|CS_VREDRAW;
    RegisterClass(&wndcls);

    HWND hwnd;
    hwnd=CreateWindow("weixin2008","北京欢迎你!",WS_OVERLAPPEDWINDOW,
        0,0,600,400,NULL,NULL,hInstance,NULL);
    ShowWindow(hwnd,SW_SHOWNORMAL);
    UpdateWindow(hwnd);

    MSG msg;
    while(GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}

LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam    )
{
    switch(uMsg)
    {
    case WM_CHAR:
            char szChar[20];
            sprintf(szChar,"char is %d",wParam);
            MessageBox(hwnd,szChar,"weixin",0);
            break;

    case WM_LBUTTONDOWN:
            MessageBox(hwnd,"mouse clicked","weixin",0);
            HDC hdc;
            hdc=GetDC(hwnd);
            TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));
            ReleaseDC(hwnd,hdc);
            break;
    case WM_PAINT:
        HDC　hDC;
        PAINTSTRUCT ps;
        hDC=BeginPaint(hwnd,&ps);
        TextOut(hDC,0,0,"维新培训",strlen("维新培训"));
        EndPaint(hwnd,&ps);
        break;
    case WM_CLOSE:
        if(IDYES==MessageBox(hwnd,"是否真的结束?","weixin",MB_YESNO))
        {
            DestroyWindow(hwnd);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd,uMsg,wParam,lParam);
    }
    return 0;
}

编译显示如下错误：
Compiling...
WinMain.cpp
C:\Documents and Settings\Administrator\桌面\新建文件夹\WinMain\WinMain.cpp(68) : error C2018: unknown character '0xa1'
C:\Documents and Settings\Administrator\桌面\新建文件夹\WinMain\WinMain.cpp(68) : error C2018: unknown character '0xa1'
执行 cl.exe 时出错.