挑战高手,为什么我的Window出不来?

百思不得其解~~我本来已经显示出来了..
关键代码如下:LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{
PAINTSTRUCT ps;
switch(message)
{
case WM_CREATE:
return 0;
case WM_PAINT:
BeginPaint(hWnd,&ps);
EndPaint(hWnd,&ps);
return 0;
case WM_DESTROY:
//Shell_NotifyIcon(NIM_DELETE,&pnid);
PostQuitMessage(0);
return 0;
case WM_SYSTRAY:
OnSysTray(hWnd,wParam,lParam);
return 0;
}
return DefWindowProc(hWnd,message,lParam,wParam);
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,
   int nShowCmd)
{
ghIns = hInstance;
OSVERSIONINFO os;
//Need Windows NT 3.51,so we must check it first..
os.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx(&os);
if((os.dwPlatformId!=VER_PLATFORM_WIN32_NT) ||!(os.dwMajorVersion > 3))
{
return EXIT_FAILURE;
}
//Create a window but not to show it..
static TCHAR szAppName[] = TEXT("XyServer");
HWND hWnd;
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(hInstance,MAKEINTRESOURCE(IDI_ICON1));
wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if(!RegisterClass(&wndclass))
{
LOGERR(LOGFILE,TEXT("This program requires Windows NT!"));
return EXIT_FAILURE;
} hWnd = CreateWindow(szAppName,
TEXT("Xyserver"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
          //GetLastError返回2
//Display a icon on the task bar..
ShowIcon(hWnd);
//Create the server thread..
ShowWindow(hWnd,SW_SHOW);//不会显示出来GetLastError返回183
UpdateWindow(hWnd);
HANDLE hThread;
DWORD dwThreadId;
hThread = CreateThread(
NULL,0,PrimaryThread,NULL,0,&dwThreadId);
CloseHandle(hThread); 
//Begin message loop
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}