MVC3 WebGrid Custom Text in Column

I'm developing a web application using MVC3 in VB.NET.

I having difficulty setting a column on the webgrid with the following action links

Edit | Details | Delete

@*@Html.ActionLink("Edit", "Edit", New With {.id = currentItem.PrimaryKey}) |
@Html.ActionLink("Details", "Details", New With {.id = currentItem.PrimaryKey}) |
@Html.ActionLink("Delete", "Delete", New With {.id = currentItem.PrimaryKey})*@

I have tried to use syntax below but I get an error where item is not declared.

grid.Column(header:= "",format:= (item) => item.GetSelectLink("Custom Text"))

How do I reference the current row or item in a webgrid to make this work?

Any help greatly appreciated.

Regards

James