Re: Problem with painting when using CScrollView::SetScaleToFitSize()

I am trying to us SetScaleToFitSize() to scale the image. If I draw
directly onto pDC the drawing
works but I get flicker. I am trying to use a custom CMemDC class that
normally works ok but with
SetScaleToFitSize() does not work. Neither the background nor white fill
area are being painted.
Can someone help?
thanks
void COVDView::OnDraw(CDC* pDC)
{
 CRect client, lp;
 GetClientRect( &client );
 lp = client;

 pDC->DPtoLP( &lp ); // Convert to logical coord

#if 1
/* Custom class to create a memory dc for drawing */
 CMemDC dc( *pDC, lp.Width(), lp.Height() ); // lp.Width() and lp.Height()
== 6000 in debugger
 dc.FillRect( &lp, &m_brBackGnd ); // gray backgnd

/* Fill area 600 wide and 5900 high (white) */
  CRect rect( 0,0, 600, 5900 );
  dc.FillSolidRect( &rect, RGB(255,255,255) );

/* Have tried all of these */
  pDC->BitBlt( 0,0, lp.Width(), lp.Height(), &dc, 0,0, SRCCOPY );
// pDC->StretchBlt( 0,0, lp.Width(), lp.Height(), &dc, 0,0, lp.Width(),
lp.Height(), SRCCOPY );
// pDC->StretchBlt( 0,0, client.Width(), client.Height(), &dc, 0,0,
lp.Width(), lp.Height(), SRCCOPY );

#else

/* This works but get flicker */

 pDC->FillRect( &lp, &m_brBackGnd ); // gray backgnd

  CRect rect( 0,0, 600, 6900 );
  pDC->FillSolidRect( &rect, RGB(255,255,255) );
#endif
}
void COVDView::OnInitialUpdate()
{
CScrollView::OnInitialUpdate();
CSize sizeTotal(6000,6000);
GetParentFrame()->RecalcLayout();
SetScaleToFitSize(sizeTotal);
}
void COVDView::OnSize(UINT nType, int cx, int cy)
{
    CScrollView::OnSize(nType, cx, cy);
   if ( cx && cy )
       SetScaleToFitSize( CSize(6000, 6000));
}