Mutiple Macros from Dropdown list?

Hi, Firstly i hope my title is good enough as ive seen many threads with bad titles.

i want to run a different macro for each of the selections in a dropdown list (combobox?), ive searched the web & found examples but some reason i couldn't get them to work, i was hoping i could ask the experts on this forum. it seems to be a simple task, so hoping to very quick response from you guys

my Macros are: HideComments & Unhidecomments.

It needs to work in both Excel 2003 & Execel 2010 as im doing it for work which uses 2003.

i would also like to ask a unrelated question but unsure if thats allowed here, so i will wait for a response & hoping you can tell me if i need a new thread.

Thank you for your time.
Smogsy.