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Textbox key down event to check for number and letter and decimal

Hello,
I have a function to do a check on keydown event of a textbox ,
how can I have it for only letters,numbers and decimal points
  Public Sub GenericTextBoxFilter(sender As Object, e As KeyEventArgs)
        If TypeOf sender Is RadTextBox Then
            Dim tb = DirectCast(sender, RadTextBox)
            MessageBox.Show(e.KeyValue.ToString())
            If (e.KeyValue.ToString()) = 192 Then
                e.SuppressKeyPress = True
                e.Handled = True
            End If
        End If
    End Sub

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RIAS
Asked:
RIAS
1 Solution
 
AndyAinscowFreelance programmer / ConsultantCommented:
https://msdn.microsoft.com/en-us/library/system.windows.forms.control.keypress(v=vs.110).aspx

Use the KeyPressed event instead.  The link has example code
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RIASAuthor Commented:
Thanks Andy as always!
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