AssignedByValParameterInspection shouldn't trigger for reference types unless Set is used

[comintern]

In a UserForm with TextBox1:

Private Sub TextBox1_Exit(ByVal Cancel As MSForms.ReturnBoolean)
    If TextBox1.Text = vbNullString Then
        MsgBox "Value required"
        Cancel = True
    End If
End Sub

The AssignedByValParameterInspection triggers on this code, but MSForms.ReturnBoolean is a reference type (why MS, why?). The line Cancel = True is assigning to the default member ReturnBoolean.Value. The only reason this inspection should report for reference types is for code like:

Set Cancel = New MsForms.ReturnBoolean

Also see #2504 - this points to the need to resolve default member calls on the LHS as well.