동영상이 재생되는 영역을 겹쳤을 때 깜빡이는 문제 해결법 아시는 분..ㅠㅠ

void  Create_render_vide0()
{
 for( int i= 0; i <MAX_WND; i++ )
 {
  m_lst_video_render[i]   =   new CVideoWnd;
 
 CString  szTitle;
 szTitle.Format(_T("VideoWnd%d"),i);
 
 m_lst_video_render[i]->Create(m_hWnd, CRect(0,0,0,0), szTitle,WS_CHILD|WS_VISIBLE);
 m_lst_video_render[i]->Initialize(i, m_hWnd);
 m_lst_video_render[i]->SetFocusWnd(FALSE); 
 }
 
long nValueRX = ::GetWindowLong(m_lst_video_render[1]->m_hWnd,GWL_STYLE);
nValueRX |= WS_BORDER /*| WS_CLIPSIBLINGS*/;
::SetWindowLong(m_lst_video_render[1]->m_hWnd,GWL_STYLE,nValueRX);
 
long nValueTX = ::GetWindowLong(m_lst_video_render[0]->m_hWnd,GWL_STYLE);
nValue |= WS_CLIPSIBLINGS;
::SetWindowLong(m_lst_video_render[0]->m_hWnd,GWL_STYLE,nValueTX);
m_lst_video_render[TX]->SetFocusWnd(TRUE);
}
 
void CVideoWnd::DrawImg( )
{
  m_csPaint.Lock();
  HDC hDC = ::GetDC(m_hWnd); 
  CRect rectDraw;
  GetClientRect(rectDraw);
 
  HDC mem_dc = ::CreateCompatibleDC( hDC );
  HBITMAP h_bitmap = ::CreateCompatibleBitmap( hDC , rectDraw.Width() , rectDraw.Height() );
 
  HBITMAP h_old_bitmap= (HBITMAP)::SelectObject( mem_dc , h_bitmap );
  if(m_pCurImg != NULL)
  {
    CRect rcSrc(0,0, m_dwWidth , m_dwHeight);
     BITMAPINFO* ppInfo  = &(m_BmpInfoOrg);
     ::SetStretchBltMode(mem_dc, COLORONCOLOR);
     ::StretchDIBits(mem_dc,rectDraw.left, rectDraw.top, rectDraw.Width(), rectDraw.Height(),           rcSrc.left, rcSrc.top, rcSrc.Width(), rcSrc.Height(),m_pCurImg, ppInfo, DIB_RGB_COLORS,SRCCOPY);
     HBRUSH hBrush;
     hBrush = ::CreateSolidBrush(RGB(0,0,0));
 
     ::ExcludeClipRect(mem_dc,rectDraw.left, rectDraw.top, rectDraw.left +rectDraw.Width(),            rectDraw.top+rectDraw.Height());
     ::FillRect(mem_dc, rectDraw, hBrush); 
     }
  ::BitBlt( hDC , rectDraw.left, rectDraw.top, rectDraw.Width(), rectDraw.Height() ,mem_dc , 0,      0,  SRCCOPY );
  ::SelectObject( mem_dc , h_old_bitmap );
  ::DeleteObject( h_bitmap );
  ::DeleteDC( mem_dc );
  ::ReleaseDC( m_hWnd , hDC);
 
  m_csPaint.Unlock();
  ::ReleaseDC(m_hWnd, hDC);
}