f (e.KeyCode >= Keys.NumPad0 And e.KeyCode <= Keys.NumPad9) Or e.KeyCode = Keys.Back 'or E.KeyCode=Keys.coma or E.KeyCode=Keys.Decimal
Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown If (e.KeyData >= Keys.D0 And e.KeyData <= Keys.D9) Or (e.KeyData >= Keys.NumPad0 And e.KeyData <= Keys.NumPad9) Or e.KeyData = Keys.Back Or e.KeyData = Keys.Delete Or e.KeyData = Keys.Decimal Then sender.readonly = False Else sender.readonly = True End If End Sub Private Sub TextBox1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TextBox1.MouseUp Try Double.Parse(sender.text) Catch ex As Exception sender.text = "" End Try
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