memory leak on WM_PAINT

void    paint (HDC hdc, RECT *pRECT){
    HDC         hDCMemory;
    HBITMAP     hBmpMemory;
    HBITMAP     hOldMemBmp = NULL;
 
    try {
 
        TCHAR szHello[MAX_LOADSTRING];
        LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
 
        hDCMemory = ::CreateCompatibleDC (hdc);
 
        // create bitmap for paint
        hBmpMemory = (HBITMAP)::CreateCompatibleBitmap(hdc, pRECT->right-pRECT->left, pRECT->bottom-pRECT->top);
        if (hBmpMemory == NULL){
            ::MessageBox (NULL, "Could not create bmp", "ASSERT", MB_OK|MB_TASKMODAL);
            ::DeleteDC(hDCMemory);           // can be skiped, will be done by destructor
            return;
        }
        hOldMemBmp = (HBITMAP)::SelectObject(hDCMemory, hBmpMemory);
 
        DrawText( hDCMemory, szHello, strlen(szHello), pRECT, DT_CENTER );
 
        ::BitBlt (hdc, 0, 0, pRECT->right-pRECT->left, pRECT->bottom-pRECT->top, hDCMemory, 0, 0, SRCCOPY);
        
        // clear resource
        if (hOldMemBmp != NULL) {
            ::SelectObject( hDCMemory, hOldMemBmp );
        }
 
        // restore dc
        ::DeleteObject(hBmpMemory);      // can be skiped, will be done by destructor
        ::DeleteDC(hDCMemory);           // can be skiped, will be done by destructor
    } catch (...){
        ::MessageBox (NULL, "Exception in paint", "ASSERT", MB_OK|MB_TASKMODAL);
    }
}

        case WM_PAINT:
            hdc = BeginPaint (hWnd, &ps);
            // ZU ERLEDIGEN: Hier beliebigen Code zum Zeichnen hinzufügen...
            RECT rt;
            GetClientRect( hWnd, &rt );
            
 
            [COLOR="Blue"][B][SIZE="4"]paint (hdc, &rt);[/SIZE][/B][/COLOR]
 
 
            EndPaint( hWnd, &ps );
            break;

ATOM MyRegisterClass( HINSTANCE hInstance )
{
    WNDCLASSEX wcex;
 
    wcex.cbSize = sizeof(WNDCLASSEX); 
    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = (WNDPROC)wndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = NULL;
    wcex.hCursor        = NULL;
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = NULL;
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = NULL;
 
    return RegisterClassEx(&wcex);
}

   hWnd = CreateWindow(szWindowClass, szTitle, WS_POPUP,
      20, 20, 300, 200, NULL, NULL, hInstance, NULL);

   ::SetTimer (hWnd, 1, 2000, NULL);
   ShowWindow( hWnd, nCmdShow );
   UpdateWindow( hWnd );

        case WM_TIMER:
            GetClientRect( hWnd, &rt );
            ::InvalidateRect (hWnd, &rt, FALSE);
            break;