C / C++ / MFC

// MyDocument.cpp
			CMyView* pView = (CMyView*)GetNextView(pos);
			CDC* pDC = pView->GetDC();

			CDC MemDC;
			MemDC.CreateCompatibleDC(pDC);

			CBitmap bitmap;
			bitmap.CreateCompatibleBitmap(pDC, GetTotalCx(), GetTotalCy());
			CBitmap* pOldBitmap = (CBitmap*)MemDC.SelectObject(&bitmap);
			// draw the MemDC
			pDC->BitBlt(0, 0, GetTotalCx(), GetTotalCy(), &MemDC, 0, 0, SRCCOPY);
			CBitmap* pFinalBitmap = (CBitmap*)MemDC.SelectObject(pOldBitmap);
			CImage Image;
			Image.Attach((HBITMAP)pFinalBitmap->m_hObject);
			Image.Save(ar.GetFile()->GetFileName(), Gdiplus::ImageFormatBMP);
			bitmap.DeleteObject();

struct node{
    int key;
    node* head;
}

node *head = NULL;
void func(node* &h,int n, int m) 
{ 
   if(n > m) 
     return;
   else {
        int mid = (n+m)/2;
        func(h->head,n,mid-1);
        func(h->head,mid+1,m);
   }
}