Sorting by Expression

[#1]

Hi All

I have a list box showing Weekly dates(from-to), week number in the month and month of the week.

I have written a sort expression to sort by week number "mid(Weeks,12,1) ". I would now like to have a second condition in the sort expression to will sort first by week number, then months in a cronological order. How can I do this?

I would also like my selected dates to show at the top of the list box as they currently at the bottom which I need to scroll down to see.

[#2]

Thanks for the soluion, it works perfectly