Whenever I add a new function to a VB.NET code inside my form, I always end up with something like this:

    Private Sub MyFunction()

    End Sub

But, why am I forced to use a function in order to return a value:

    Private Function GetUrl(ByVal tcUrl As String) As String
        Dim lcMergedText As String

        Return lcMergedText
    End Function

This syntax confuses me. I just don't understand why we can't use the Sub approach when returning a value.