Which line is showing the green squiggly?

have you tried:

Dim myHistoricalRatesDS As HistoricalRatesDS = nothing

>I keep getting a lot of "Use of variable prior to assignment" warnings in VB 2005. I know that I can turn them off at the project level and usually do this, but it makes me suspicious that maybe I am doing something that I shouldn't. Here is a snippet in a business class:
>
>

>    Public Function LoadHistoricalRates() As HistoricalRatesDS
>
>        'This is my data access class...
>        Dim myHistoricalRatesData As New HistoricalRatesData
>        'This is my dataset.  I don't instantiate it here because it is instantiated
>        'in my data access class...
>        Dim myHistoricalRatesDS As HistoricalRatesDS
>
>        'An instance of HistoricalRatesDS is instantiated in my data access
>        'class so I don't instantiate it again...
>        myHistoricalRatesDS = myHistoricalRatesData.LoadHistoricalRates
>
>        'Here is where I get the warning...
>        Return myHistoricalRatesDS
>
>    End Function
>