#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK WinSunProc(
HWND hwnd,      // handle to window
UINT uMsg,      // message identifier
WPARAM wParam,  // first message parameter
LPARAM lParam   // second message parameter
);

int WINAPI WinMain(
  HINSTANCE hInstance,      // handle to current instance
  HINSTANCE hPrevInstance,  // handle to previous instance
  LPSTR lpCmdLine,          // command line
  int nCmdShow              // show state
)
{
  WNDCLASS wndcls;
  wndcls.cbClsExtra=0;
  wndcls.cbWndExtra=0;
  wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
  wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
  wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
  wndcls.hInstance=hInstance;
  wndcls.lpfnWndProc=WinSunProc;
  wndcls.lpszMenuName="weixin2003";
  wndcls.lpszMenuName=NULL;
  wndcls.style=CS_HREDRAW | CS_VREDRAW;
  RegisterClass(&wndcls);

  HWND hwnd;
  hwnd=CreateWindow("weixin2003","北京维新科学技术培训中心",WS_OVERLAPPEDWINDOW,0,0,600,
            400,NULL,NULL,hInstance,NULL);

  ShowWindow(hwnd,SW_SHOWNORMAL);
  UpdateWindow(hwnd);


  MSG msg;
  while(GetMessage(&msg,NULL,0,0))
  { 
  TranslateMessage(&msg);
      DispatchMessage(&msg);
  }
  return 0;

}

LRESULT CALLBACK WinSunProc(
HWND hwnd,      // handle to window
UINT uMsg,      // message identifier
WPARAM wParam,  // first message parameter
LPARAM lParam   // second message parameter
)
{
   switch(uMsg)
   {

   case WM_CHAR:
   char szChar[20];
   sprintf(szChar,"char code is %d",wParam);
   MessageBox(hwnd,szChar,"Char",0);
    break;
   case WM_LBUTTONDOWN:
   MessageBox(hwnd,"mouse clicked","weixin",0);
   HDC hdc;
   hdc=GetDC(hwnd);
       TextOut(hdc,0,50,"计算机语言培训",strlen("计算机语言培训"));
   ReleaseDC(hwnd,hdc);
    break;
   case WM_PAINT:
HDC hDc;
PAINTSTRUCT ps;
hDc=BeginPaint(hwnd,&ps);
TextOut(hDc,0,0,"维新培训",strlen("维新培训"));
EndPaint(hwnd,&ps);
break;
   case WM_CLOSE:
   if(IDYES==MessageBox(hwnd,"是否真的结束？","message",MB_YESNO))
   {
         DestroyWindow(hwnd);
   }
break;
   case WM_DESTROY:
   PostQuitMessage(0);
break;
   default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
   }
    return 0;
}



没有错误和警告，程序运行部了，麻烦大侠看看！！！