Search Range For Item And Copy To Another Worksheet

I wish to compare each item (4-8 digit alphanumeric ID) in a list in column B of worksheet 1 (Portfolio) to all of the items in column B of worksheet 3 (EssBase Cap). The data (ID) in column B of 'EssBase Cap'! is concatenated with its description so my code needs to strip off the leading zeros and everything after "-" in order to do the comparison. Once a match is found it should copy the corresponding values in 'EssBase Cap'! for that row, column D and E to 'Portfolio' Column J, and K. I have created some pseudo code and need to translate this to Excel VBA

Dim IBSPWD As String
Dim ProjectPCN As String
Dim Pos As Integer
Dim I As Integer
Dim J As Integer
For I = 3 To 'to end of range ? WHat is the code to find end of the range IE no more data?
For J = 6 'to end of range ? The nested for loop will check each item in Portfollio and compare it to each item in Essbase Cap
IBSPWD = 'EssBase Cap'!Cell(J,"B") 'fill in the string with data
Pos = InStr(1, IBSPWD, "-", vbTextCompare) 'find length of the string befor "-"...............................