[Windows Forms] [VB.NET] TEXTBOX 輸入限制 -只能輸入字母

  Private Sub txtbox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtbox1.KeyPress
        '只能輸入字母
        If Char.IsLetter(e.KeyChar) = True Or Char.IsControl(e.KeyChar) = True Then
            e.Handled = False
        Else
            e.Handled = True
        End If
    End Sub