+
+ // preserve the existing background, otherwise we'd erase anything the user
+ // code had drawn in its EVT_ERASE_BACKGROUND handler when we do the Blit
+ // back below
+ dcm.Blit(0, rect.GetTop(),
+ sz.x, rect.GetBottom() - rect.GetTop() + 1,
+ &dc,
+ 0, rect.GetTop());
+