function and argument

[PsSheba]

My problem:
I create an array of strings of an unknown size.
The size of the array varies according to user's acrion.
I want to send the array to a function which accepts as an argument a string.
( Public function MyFunction(strMyArrayOfStrins))
In the function i want to do some actions on that array but the function treats it as a string parameter, not an array.
How do i send, or how do i declare the function's argument so that the function will know that this is an array ?
Thank in advance !