win32例程窗口显示不出来

Question

#include <windows.h>LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine,int iCmdShow)
{
TCHAR szAppName=TEXT("HELLOWIN");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style=CS_HREDRAW|CS_VREDRAW;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hInstance=hInstance;
wndclass.hbrBackground=(HBRUSH) GetStockObject (WHITE_BRUSH);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.lpszMenuName=NULL;
    wndclass.lpfnWndProc=WndProc;
wndclass.lpszClassName=szAppName; if(!RegisterClass(&wndclass))
{
MessageBox(NULL,TEXT("ERROR"),szAppName,MB_ICONERROR);
return 0;
}
               hwnd=CreateWindow(szAppName,
              TEXT("HELLO PROGRAM"),
  WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  CW_USEDEFAULT,
  NULL,
  NULL,
  hInstance,
  NULL); 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) ;
//播放一个声音文件，例程给出这样的代码，我没有这样的文件·直接忽略
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) ;
}
这个是WINDOWS程序设计里面的一个例程，为什么窗口只是显示了一下就没了··一闪而过那样··哪位高手能指点一下··

Answer 1

while(!GetMessage(&msg,NULL,0,0)) 
========
改成while(GetMessage(&msg,NULL,0,0))