clearing text boxes in multiple panels on a vb2010 form

i have searched around for a method to clear all text boxes on multiple panels and the general consensus seems to me that this will work.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim a As Control
        For Each a In Me.GroupBox1.Controls
            If TypeOf a Is TextBox Then
                a.Text = Nothing
            End If
    End Sub

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unfortunately it doesn't clear any text boxes at all.

i did see one post that referred to an issue if there is a menustrip, which i do have on the form, but it wasn't clear
Larry RungrenDirector of TechnologyAsked:
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Larry RungrenDirector of TechnologyAuthor Commented:
this is to clear text boxes in selective panels
Larry RungrenDirector of TechnologyAuthor Commented:
I found a block that does work.  republish for any other newbies trying to convert old vb6 code

 Public Sub ClearTextBoxes(Optional ByVal ctlcol As Control.ControlCollection = Nothing)
        If ctlcol Is Nothing Then ctlcol = Me.Controls
        For Each ctl As Control In ctlcol
            If TypeOf (ctl) Is TextBox Then
                DirectCast(ctl, TextBox).Clear()
                If Not ctl.Controls Is Nothing OrElse ctl.Controls.Count <> 0 Then
                End If
            End If
    End Sub

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Mike TomlinsonHigh School Computer Science, Computer Applications, and Mathematics TeachersCommented:
An alternate version as an extension method of Control:
Public Module Extensions

	Public Sub ClearTextBoxes(ByVal containerControl As Control)
		For Each childControl As Control In containerControl.Controls
			If TypeOf childControl Is TextBox Then
			ElseIf childControl.HasChildren Then
			End If
	End Sub

End Module

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Allowing you to call it like this:
Public Class Form1

	Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
	End Sub

End Class

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Larry RungrenDirector of TechnologyAuthor Commented:

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Visual Basic.NET

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