SilkTest - Make sublist from a list

I have written a function to get sublist from a list of items. I have done for STRING type. You can try for ANYTYPE data type.Its usage is similar to SubString. See the following code snippet.

Silktest code sample: GetSubList

[+] public LIST OF STRING GetSubList(LIST OF STRING lsInput, STRING sFirst optional, STRING sLast optional, Boolean bMatch optional)
[ ] //To get String list between sFirst and sLast
[ ] //If sFirst is NULL or "", SubList will be taken from first item of list
[ ] //If sSecond is Null or "", SubList will be taken upto last item of list
[ ] //bMatch - FALSE means exact match, TRUE means Partial Match
[ ] Integer iCount, iItem
[ ] Boolean bFirst = FALSE
[ ] Boolean bLast = FALSE
[ ] LIST OF STRING lsReturn = {}
[ ]
[-] if (IsNull(bMatch))
[ ] bMatch = FALSE
[-] if (IsNull(sFirst) || (sFirst == ""))
[ ] bFirst = TRUE
[ ]
[ ] iCount = ListCount(lsInput)
[-] for iItem=1 to iCount
[-] if !(bFirst)
[-] if !(bMatch)
[-] if (sFirst == lsInput[iItem])
[ ] bFirst = TRUE
[ ] ListAppend(lsReturn,lsInput[iItem])
[-] else
[-] if (Len(sFirst) <= Len(lsInput[iItem]))
[-] if (MatchStr("*{sFirst}*",lsInput[iItem]))
[ ] bFirst = TRUE
[ ] ListAppend(lsReturn,lsInput[iItem])
[+] else
[-] if !(bLast)
[ ] ListAppend(lsReturn,lsInput[iItem])
[-] if !(IsNull(sLast))
[-] if !(bMatch)
[-] if (sLast == lsInput[iItem])
[ ] bLast = TRUE
[-] else
[-] if (MatchStr("*{sLast}*",lsInput[iItem]))
[ ] bLast = TRUE
[-] else
[ ] break  //Exit from for loop
[ ]
[ ] return lsReturn
[ ]