关于《visualC++面向对象和可视化程序设计>的一个程序出错问题

通过编译，出现以下错误：
\windows\windows.cpp(26) : error C2440: '=' : cannot convert from 'void *' to 'struct HBRUSH__ *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit cast
Error executing cl.exe.
出错行是：  wndclass.hbrBackground=GetStockObject(WHITE_BRUSH);请问为什么会出现这种错误，请各位大虾帮帮忙解答，谢谢。
附源程序如下：
//window.hÎÄ¼þÖÐ°üº¬Ó¦ÓÃ³ÌÐòÖÐËùÐèµÄÊý¾ÝÀàÐÍºÍÊý¾Ý½á¹¹µÄ¶¨Òå
#include<windows.h>
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);  //´°¿Úº¯ÊýËµÃ÷
//---------------------ÒÔÏÂ³õÊ¼»¯´°¿ÚÀà---------------------------
int WINAPI WinMain(HINSTANCE hInstance,     //WinMainº¯ÊýËµÃ÷
   HINSTANCE hPreInst,
   LPSTR     lpszCmdLine,
   int       nCmdShow)
{
  HWND hwnd;
  MSG Msg;
  WNDCLASS wndclass;
  char lpszClassName[]="´°¿Ú";          //´°¿ÚÀàÃû
  char lpszTitle[]="My_Windows";      //´°¿Ú±êÌâÃû   //´°¿ÚÀàµÄ¶¨Òå
  wndclass.style=0;                     //´°¿ÚÀàÐÍÎªÄ¬ÈÏÀàÐÍ
  wndclass.lpfnWndProc=WndProc;         //´°¿Ú´¦Àíº¯ÊýÎªWndProc
  wndclass.cbClsExtra=0;                //´°¿ÚÀàÎÞÀ©Õ¹
  wndclass.cbWndExtra=0;                //´°¿ÚÊµÀýÎÞÀ©Õ¹
  wndclass.hInstance=hInstance;         //µ±Ç°ÊµÀý¾ä±ú
  wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
                                        //´°¿ÚµÄ×îÐ¡»¯Í¼±êÎªÄ¬ÈÏÍ¼±ê
  wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
                                        //´°¿Ú²ÉÓÃ¼ýÍ·Í¼±ê
  wndclass.hbrBackground=GetStockObject(WHITE_BRUSH);
                                        //´°¿Ú±³¾°Îª°×É«
  wndclass.lpszMenuName=NULL;           //´°¿ÚÖÐÎÞ²Ëµ¥
  wndclass.lpszClassName=lpszClassName;
                                        //´°¿ÚÀàÃûÎª"´°¿ÚÊ¾Àý"
//---------------------ÒÔÏÂ½øÐÐ´°¿ÚÀàµÄ×¢²á------------------------------
    if(!RegisterClass(&wndclass))        //Èç¹û×¢²áÊ§°ÜÔò·¢³ö¾¯¸æÉùÒô
        {
MessageBeep(0);
return FALSE;
        }
//´´½¨´°¿Ú
hwnd=CreateWindow(lpszClassName,     //´°¿ÚÀàÃû
                  lpszTitle,        //´°¿ÚÊµÀýµÄ±êÌâÃû
  WS_OVERLAPPEDWINDOW,   //´°¿ÚµÄ·ç¸ñ
  CW_USEDEFAULT,
  CW_USEDEFAULT,         //´°¿Ú×óÉÏ½Ç×ø±êÎªÄ¬ÈÏÖµ
  CW_USEDEFAULT,
  CW_USEDEFAULT,         //´°¿ÚµÄ¸ßºÍ¿íÎªÄ¬ÈÏÖµ
  NULL,                  //´Ë´°¿ÚÎÞ¸¸´°¿Ú
  NULL,                  //´Ë´°¿ÚÎÞÖ÷²Ëµ¥
  hInstance,             //´´½¨´Ë²Ëµ¥µÄÓ¦ÓÃ³ÌÐòµÄµ±Ç°¾ä±ú
  NULL);                 //²»Ê¹ÓÃ¸ÃÖµ         //ÏÔÊ¾´°¿Ú
ShowWindow(hwnd,nCmdShow);
//»æÖÆÓÃ»§Çø
UpdateWindow(hwnd);
//ÏûÏ¢Ñ»·
while(GetMessage(&Msg,NULL,0,0))
        {
   TranslateMessage(&Msg);
   DispatchMessage(&Msg);
        }
return Msg.wParam;                        //ÏûÏ¢Ñ»·½áÊø¼´³ÌÐòÖÕÖ¹ÊÇ½«ÐÅÏ¢·µ»ØÏµÍ³}//´°¿Úº¯Êý
LRESULT CALLBACK WndProc(HWND hwnd,
                         UINT message,
WPARAM wParam,
LPARAM lParam){
switch(message)
    {

    case WM_DESTROY:
PostQuitMessage(0);                    //µ÷ÓÃPostQuitMessage·¢³öWM_QUITÏûÏ¢
default:                                   //Ä¬ÈÏÊ±²ÉÓÃÏµÍ³ÏûÏ¢Ä¬ÈÏ´¦Àíº¯Êý
return  DefWindowProc(hwnd,message,wParam,lParam);
    }
return (0);
}

解决方案 »

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wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
用一个显示的转换就可以了，你将你的语句wndclass.hbrBackGround=(HBRUSH)GetStockObject(WHITE_BRUSH)
你把这个语句换成我给你说的这个就可以了。
你去查一下显示转换方面的内容就知道了
不行啊，改了之后出现以下错误：
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/windows.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
好象你的EXE还在运行，关掉他，在试一试
[Project->Settings]->[C/C++]->[Preprocessor definitions]->_CONSOLE改成_WINDOWS