How to add checkbox in datetime picker control ?

I have a form with two DateTimePicker controls. dtpDate has the Format property set to Long and dtpTime has the Format property set to Time and ShowUpDown set to True.

I created one check box chkDT but you could create a check box for each control.

Private Sub chkDT_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkDT.CheckedChanged
        If chkDT.Checked = True Then
            dtpDate.Value = Now
            dtpTime.Value = Now
            dtpDate.Enabled = False
            dtpTime.Enabled = False
        Else
            dtpDate.Enabled = True
            dtpTime.Enabled = True
        End If
    End Sub

Hope this helps.