Painting a thumbnail

[User (Legacy)]

I try to save a thumbnail of the Chart into a JPEG picture. 

This is what I have done: 

I first create a memDC (100x100). 

then I call: 

// paint on the memDC 

m_chart.Paint((LONG)memDC.m_hDC, 0, 0, 100, 100, CPAINT_BKGND, 0); 

// show it on the screen 

CDC *pdc = CDC::FromHandle (::GetDC (NULL)); 

 pdc->BitBlt (0, 0, 100, 100, &memDC, 0, 0, SRCCOPY); 

// ... save as jpeg.... 

........ 

What I got is a small picture. 

I wonder how you guys did it in the print preview. I would love to save that 

tiny picture as a thumbnail. 

Thanks 

Frank Liang 

Broadbase Software.