Combinations of numbers to equal one total

Hello gurus!

Here's my question...I have a list of numbers and I want to know how many combinations (and what they are) of adding the numbers will equal an amount.
e.g.
List of Numbers
1
2
3
4
5
6
7
8
9
10

Amount to be reached = 12

These are some of the possible combinations to reach 12 :
2+10
3+9
4+8
5+7
3+4+5
6+3+2+1

Is there a function in Excel that will do this for me? I want to know which numbers (i.e. cells) can be added to reach 12. AND, if possible, colorcode the cells added for each combination.

Good luck and thanks!!

Yikes! I had no idea it was that involved....I guess I'll just do it the old fashioned way and guess! Thanks for your help DominicB!

P.S. Since this seems like a useful tool, you'd think the Excel creators would incorporate it into the available functions within Excel!