'clear' function won't work

[Andy]

ok, I have several functions of which each clear (initialize) each individual control encountered on a form (textbox, combobox, etc)

They work like a charm UNLESS those controls are on a tab that is on a tab. ex. I have a main tab control and the controls (tabs and its controls) get cleared fine. I have other tab controls sitting on that main one. THOSE tabs and the controls sitting on those aren't getting touched. following are the basic fuctions:

'***************************************************************************************************
        'Initialize the tab pages
 
        For Each ctrl As Control In Me.Controls
            If TypeOf ctrl Is TabControl Then
 
                ClearTabControl(ctrl)
 
            End If
 
        Next

Public Sub ClearListBox(ByVal box As ListBox)
        'Purpose    :   Clear a list box of all items
        'Accepts    :   listbox control 
        'Notes      :   
        box.Items.Clear()
    End Sub
 
    Public Sub ClearTabControl(ByVal tc As TabControl)
        'Purpose    :   clears all tabpages on a tabpage control
        'Accepts    :   control as tabcontrol
        'Returns    :   
        'Notes      :   
 
        For Each ctrl As Control In tc.Controls
            Try
                If TypeOf ctrl Is TabPage Then
                    ClearTab(ctrl)
                End If
            Catch ex As Exception
 
            End Try
        Next
 
    End Sub
 
    Public Sub ClearTab(ByVal tab As TabPage)
        'Purpose    :   Clears an entire tab control of data
        'Accepts    :   tabpage control
        'Notes      :   this sub calls on other subs to do the work
 
        For Each ctrl As Control In tab.Controls
 
            Try
                'Clear all textboxes
                If TypeOf ctrl Is TextBox Then
                    TextBoxClear(ctrl)
                End If
 
                'Next, ComboBoxes
                If TypeOf ctrl Is ComboBox Then
                    ComboBoxClear(ctrl)
                End If
 
                'Next, Groupboxes
                If TypeOf ctrl Is GroupBox Then
                    GroupBoxClear(ctrl)
                End If
 
                'Next, other Tabs
                If TypeOf ctrl Is TabPage Then
                    ClearTab(ctrl)
                End If
 
                'Next, Listboxes
                If TypeOf ctrl Is ListBox Then
                    ClearListBox(ctrl)
                End If
            Catch
            End Try
        Next
 
    End Sub
 
    Public Sub ComboBoxClear(ByVal Box As ComboBox)
        'Purpose    :   Resets a combobox to the first item in the collection list
        'Accepts    :   combox as argument
        'Notes      :   This doesn't delete any info, it just resets the box
 
        Try
            Box.Text = Box.Items.Item(0)
 
        Catch
 
        End Try
 
    End Sub
 
Public Sub GroupBoxClear(ByVal groupbox As GroupBox)
        'Purpose    :   Clear all textboxes within a groupbox control
        'Accepts    :   groupbox as argument
        'Notes      :   
 
 
        For Each ctrl As Control In groupbox.Controls
 
            Try
                If TypeOf ctrl Is TextBox Then
 
                    TextBoxClear(ctrl)
 
                End If
 
                If TypeOf ctrl Is ComboBox Then
 
                    ComboBoxClear(ctrl)
 
                End If
 
            Catch
 
            End Try
 
        Next
 
 
    End Sub
 
 Public Sub TextBoxClear(ByVal box As TextBox)
        box.Text = String.Empty
    End Sub

apparantly, i'm missing something when program control goes to TAB CONTROL .