Nested Function Does Not Have The Same Signature As Delegate 'System.Func(Of Object)'

I have a section of code that deletes a lot of columns, one at at time, based on conditions that arise. Currently it does this:

objrpt.objXLSheet.Columns(col) _
.EntireColumn.Delete(Excel.XlDeleteShiftDirection.xlShiftToLeft)

There are so many of these, that I'm getting tired of looking at these lines so I want to curry the references to the Excel stuff.I tried:

Dim DelCol As Func(Of Integer) = Function(col As Integer) _
objrpt.objXLSheet.Columns(col) _
.EntireColumn.Delete(Excel.XlDeleteShiftDirection.xlShiftToLeft)

but that won't compile, giving me the error: "Nested function does not have the same signature as delegate 'System.Func(Of Integer)'. Ah forget it. I see that I'm trying to call a method from a function. I guess that won't work.Wait, I'm now trying it another way. I first defined a function:

Private Function DeleteColumn(ByRef objrpt As ExcelReport, ByVal col As Integer) As Object
DeleteColumn = Nothing
Dim objrng As Excel.Range

[code]....

Now the error message is a little different:

"Nested function does not have the same signature as delegate 'System.Func(Of Object)'.