InfoPath Dev

i have a list for holidays in an year, i am having two controls in an infopath form that are date picker,i need to calculate if between two selected dates there is any holiday or not i mean i'm comparing it with a list and checking if it is a holiday or not.please provide me a sample code if there is anyone,it will be a great help and i'll  really appreciate that..

Try this:

http://alecpojidaev.wordpress.com/2008/12/30/infopath-codeless-programming-walkthrough-2/

no help from that post,i need to compare the date values with the dates in my list and needs to find if that is holiday or not,problem is i can't compare timespan with the dates from the list,because no matter if i'm selecting date only in list,it is showing,date and time both,and there timespan fails,data is not matching..