Datetimerpicker 兼容WIN7的斜杠短日期格式

  start_created := formatdatetime('yyyy-mm-dd',DateTimePicker1.Date) + '' + formatdatetime('hh:mm:ss',DateTimePicker2.Date);
  end_created := formatdatetime('yyyy-mm-dd',DateTimePicker3.Date) + '' + formatdatetime('hh:mm:ss',DateTimePicker4.Date);