private void ControlsToData()
{
if (_vxiTriggerLines == null)
_vxiTriggerLines = new VXITriggerLines();
_vxiTriggerLines.sourceSpecified = chkSource.Checked;
_vxiTriggerLines.senseSpecified = chkSense.Checked;
_vxiTriggerLines.sense = chkSense.Checked ? (int) edtSense.Value : 0;
_vxiTriggerLines.source = chkSource.Checked ? (int) edtSource.Value : 0;
}