Defining and setting workbook object variable?

I'm working on my first macro that works over multiple workbooks and I'm stuck at line 1. I obviously have the syntax wrong but I can't figure out why this code doesn't work. Do I need the full pathname for the workbook name?

Sub Import1()
Dim ws As Worksheet:    Set ws = Sheets(1)
Dim wb As Workbook:     Set wb = Workbooks("Training2.xlsx")

MsgBox ws.Name
MsgBox wb.Name

End Sub

I know... I know, this should be basics 101!

GG