enable/disable tab function in vb.net form

I want to go thru a form with multiple textboxs and edit the fields as I go. Using the txtbox1.keydown and txtbox1.keypress I seem to be able yo captue the [Enter] key, validate the data and either move to the next txtbox2 if good or display an error message and re-focus on the current txtbox1.  The problem is these methods do not seem to trap the [Tab] key - which then bypasses my edits.  Using the following code I am able to capture the tab key, validate the data but I cannot suppress the key and re focus on the current txtbox...


Any way to not tab here?
Thanks,

Protected Overrides Function ProcessCmdKey(ByRef msg As Message, _
                           ByVal keyData As Keys) As Boolean
        Const WM_KEYDOWN As Integer = &H100
        Const WM_SYSKEYDOWN As Integer = &H104
 
        If ((msg.Msg = WM_KEYDOWN) Or (msg.Msg = WM_SYSKEYDOWN)) Then
            Select Case (keyData)
 
                Case Keys.Tab
                    'MsgBox("Tab Key Captured in the " + Me.ActiveControl.Name + " control!")
 
                    'I can do something based on the active control
                    Select Case Me.ActiveControl.Name
                          case TxtBox1
                               if not  validatedata1() then
                                   DON'T PROCESS TAB KEY!!!  ?????
                               end if
                    end select

Select allOpen in new window