mschart conditional format

Hi, I am using an mschart in an asp web page. (I use VB.net but am happy if some-one gives solution in C#) Is it possible to conditionally format either columns or an area of a chart or the labels on x axis. I want to highlight week-end days. The chart has days along the x axis, the label is in format "dd/mm/yyyy" so is it possible to loop through these to check day of week and colour them e.g. pink.
It would be similar to the web site: skyscanner.net month view
http://www.skyscanner.net/flights/lo...-may-2011.html

found solution:

http://msdn.microsoft.com/en-us/libr...valoffset.aspx