Object Code upgrade to .NET

What would be a good way to convert this code?
I want to clear all of the controls on my form without calling each one independently. This is the code in VB6. The code advisor said that this was not going to work (I forgot the actual error).

VB Code:

Dim ctl As Control
    For Each ctl In Me.Controls
        If TypeOf ctl Is TextBox Then
            ctl.Text = ""
        ElseIf TypeOf ctl Is OptionButton Then
            ctl.Value = 0
        ElseIf TypeOf ctl Is CheckBox Then
            ctl.Value = 0
        End If
    Next

Are the form controls still called ActiveX controls?
Also, are there any references that might help with understanding the changes from VB6 to .NET?