C#用HOOK函数自动关闭IE广告窗口

LRESULT CALLBACK CallWndProc(
int nCode, // hook code
WPARAM wParam, // current-process flag
LPARAM lParam // address of structure with message data
)
{
   CWPSTRUCT *pCwp = NULL;
   CString strClassName;
   HWND hWnd = NULL;
   unsigned long ulStyle = 0;
   BOOL bIsClosed = FALSE;
   
   if (nCode < 0)
   {
      return CallNextHookEx(gHook, nCode, wParam, lParam);
   }
   
   if (NULL != lParam)
   {
      pCwp = (CWPSTRUCT *)lParam;
      if (WM_SHOWWINDOW == pCwp->message)
      {
         ::GetClassName(pCwp->hwnd, strClassName.GetBufferSetLength(128), 128);
         //IE窗口的类型为IEFrame
         if (0 == strClassName.CompareNoCase("IEFrame"))
         {
            hWnd = ::GetWindow(pCwp->hwnd, GW_CHILD);
            if (NULL == hWnd)
            {
               bIsClosed = TRUE;
            }
            while (NULL != hWnd)
            {
               ::GetClassName(hWnd, strClassName.GetBufferSetLength(127), 127);
               //IEFrame的子窗口包含窗口类型WorkerW
               if (0 == strClassName.CompareNoCase("WorkerW"))
               {
                  //若WorkerW不可见，则一般是广告弹出窗口
                  if (0 == (::GetWindowLong(hWnd, GWL_STYLE) & WS_VISIBLE))
                  {
                     bIsClosed = TRUE;
                     break;
                  }
                  break;
               }
               else
               {
                  bIsClosed = TRUE;
               }
               hWnd = ::GetWindow(hWnd, GW_HWNDNEXT);
            }
            //若是IE广告弹出窗口，则关闭
            if (TRUE == bIsClosed)
            {
               ::PostMessage(pCwp->hwnd, WM_CLOSE, 0, 0);
            }
         }
      }
   }
   
   return CallNextHookEx(gHook, nCode, wParam, lParam);
}

在主程序中，调用DLL中的CallWndProc。

//获得动态链接库句柄
HINSTANCE hmodHook = GetModuleHandle("CloseWndDll.dll");
if (NULL == hmodHook)
{
   return TRUE;
}

//设置钩子函数
if (NULL == gHook)
{
   gHook = SetWindowsHookEx(WH_CALLWNDPROC,
   (HOOKPROC)GetProcAddress(hmodHook, "CallWndProc"), hmodHook, 0);
}

主程序退出时，注意调用钩子卸载函数。

//卸载钩子函数
if (NULL != gHook)
{
   UnhookWindowsHookEx(gHook);
   gHook = NULL;
}