Controlling WebBrowser in ATL window. How to free memory when the window is unloaded? I am stuck

I have a Win32 C ++ application. There is a _tWinMain (...) method with GetMessage (...) in the while loop at the end. Before GetMessage (...) I create a main window with

HWND m_MainHwnd = CreateWindowExW(WS_EX_TOOLWINDOW | WS_EX_LAYERED, CAxWindow::GetWndClassName(), _TEXT("http://www.-website-.com"), WS_POPUP, 0, 0, 1024, 768, NULL, NULL, m_Instance, NULL);

ShowWindow(m_MainHwnd)

      

        
        
        
      

    

If I don't create the main window, my application needs about 150KB in memory.

But when you create the main window using the WebBrowser control internally, the memory usage increases to 8500K.

But I want to dynamically unload the main window. My _tWinMain (...) keeps working! I'm unloading with

DestroyWindow(m_MainHwnd)

      

        
        
        
      

    

But the WebBrowser control will not unload and deallocate used memory!

The used application memory is still 8500K!

I can also get a WebBrowser instance or with some extra code WebBrowser HWND

IWebBrowser2* m_pWebBrowser2;

CAxWindow wnd = (CAxWindow)m_MainHwnd;

HRESULT hRet = wnd.QueryControl(IID_IWebBrowser2, (void**)&m_pWebBrowser2); 

      

        
        
        
      

    

So I tried to free the memory used by the main window and WebBrowser control with (say experimental):

if(m_pWebBrowser2) 
   m_pWebBrowser2->Release();

DestroyWindow(m_hwndWebBrowser);  //<-- just analogous

OleUninitialize();

      

        
        
        
      

    

No success.

I also created a wrapper class that creates the main window. I created a pointer and deallocated it with delete:

Wrapper* wrapper = new Wrapper();
//wrapper creates main window inside and shows it
//...do some stuff
delete(wrapper);

      

        
        
        
      

    

No success. Still 8500K. So please, how can I get rid of the main window, which is WebBrowser control and free up memory back to about 150K. Later I recreate the window. It dynamically loads and unloads the main window, depending on other commands.

Thanks!

Hello

Martin