老是提示这个错误,如图: 到底什么原因啊,晕!
编译成功:--------------------Configuration: hello - Win32 Debug--------------------
Compiling...
hello.cpp
Linking...

hello.exe - 0 error(s), 0 warning(s)

代码:
#include <windows.h>
LRESULT CALLBACK Wndproc (HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain (HINSTANCE hInstance,
HINSTANCE hPrevInstance,
PSTR szCmdline,
int iCmdshow)
{
static TCHAR szAppName[] = TEXT ("HelloWorld");

static TCHAR lpszTitle[] = TEXT ("My First Windows program");
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(NULL,IDI_APPLICATION);
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,TEXT("The 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 ("hmx.mp3"),NULL,SND_FILENAME | SND_ASYNC);
// return 0;
case WM_PAINT:
hdc = BeginPaint ( hwnd,&ps);
GetClientRect ( hwnd,&rect);
DrawText ( hdc,TEXT (" Hello world!"),15,&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);
}

问题补充：
我的是XP系统

GetLastError()得到 87参数错误
在wndclass.lpszClassName = szAppName;一句后面加上以下语句
wndclass.hCursor=LoadCursor(NULL,IDC_CROSS);