extracting sustrings from a string to array

Question

Hi

I want to extract sustrings from a string and want to store in an array.
The string is dynamic it will change but the criteria to extract substring is same.
say for example a string str="something is [!better] than [!nothing]"
so i need to extract [!better] and [!nothing] from the string and store it in a string array, the string is dynamic it changes but i need to extract data between [ and ] including both the square brackets.
If anybody can send any sample code, I will be very thankfull.
Thanks

Ansari