windows编程中的一段代码调不出来，请大侠指教下

以下是引用hellovfp在2011-12-30 11:57:21的发言：

#include  
#pragma comment (lib, "winmm.lib") playsound函数需要的库文件。
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
    HWND hwnd ;
    static TCHAR szAppName[] = TEXT ("HelloWin") ;
    MSG msg ;
    WNDCLASS wndclass ;
     
    wndclass.style = CS_HREDRAW | CS_VREDRAW ;
    wndclass.lpfnWndProc = WndProc ;
    wndclass.cbClsExtra = 0 ;
    wndclass.cbWndExtra = 0 ;
    wndclass.hInstance = hInstance ;
    wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
    wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
    wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
    wndclass.lpszMenuName = NULL ;
    wndclass.lpszClassName = szAppName ;
     
    if (!RegisterClass (&wndclass))
    {
        MessageBox ( NULL, TEXT ("This program requires Windows NT!"),
            szAppName, MB_ICONERROR) ;
        return 0 ;
    }
    hwnd =CreateWindow( szAppName, // window class name 中文括号，多余
        TEXT ("The Hello Program"), // window caption 这里少个个括号
        WS_OVERLAPPEDWINDOW, // window style
        CW_USEDEFAULT, // initial x position
        CW_USEDEFAULT, // initial y position
        CW_USEDEFAULT, // initial x size
        CW_USEDEFAULT, // initial y size
        NULL, // parent window handle
        NULL, // window menu handle
        hInstance, // program instance handle
        NULL) ; // creation parameters
    ShowWindow (hwnd, iCmdShow) ;
    UpdateWindow (hwnd) ;
    while (GetMessage (&msg, NULL, 0, 0))
    {
        TranslateMessage (&msg) ;
        DispatchMessage (&msg) ;
    }
    return msg.wParam ;//这里后面多了一个括号
 
    ShowWindow (hwnd, iCmdShow) ;
    UpdateWindow (hwnd) ;
    while (GetMessage (&msg, NULL, 0, 0))
    {
        TranslateMessage (&msg) ;
        DispatchMessage (&msg) ;
    }
    return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC hdc ;
    PAINTSTRUCT ps ;
    RECT rect ;
    switch (message)
    {
    case WM_CREATE:
        PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
        return 0 ;
    case WM_PAINT:
        hdc = BeginPaint (hwnd, &ps) ;
        GetClientRect (hwnd, &rect) ;
        DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect,
            DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
        EndPaint (hwnd, &ps) ;
        return 0 ;
    case WM_DESTROY:
        PostQuitMessage (0) ;
        return 0 ;
    }
    return DefWindowProc (hwnd, message, wParam, lParam) ;
}