help me understand the mentioned vb script

[Karthik_b]

Dear friends ,

Please explain the part of the script in Bold.

Code:

Const constBaseWebEditIndex = 9

Dim intIndex,vectPartNumber

vectPartNumber = Split( DataTable( "Part_Number", "MR_Creation" ), "," )

For intIndex = 0 To UBound( vectPartNumber )
    Browser("Browser").Page("HUB").WebButton("Add").Click
    Wait(4)

    Browser("Browser").Page("HUB").[b]WebEdit("name:=WebEdit",    "Index:=" & constBaseWebEditIndex + intIndex*3 )[/b].Set        Trim( vectPartNumber( intIndex ) )

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