Custom Format DateTimePicker

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C#

I'm working on C# windows form app and I have a two dateTimePicker controls. I've used customFormat to display the controls in "HH:mm:ss". I'd like to use one control as my startTime and the other as my endTime. I can't seem to figure out how to set a maximum time and a minimum times for the controls or how not allow the dateTimePicker thats used for startTime to greater then the dateTimePicker thats used for my endTime. Example

// would like for time to be within a specified range
// e.g. 09:30:00 to 16:00:00
DateTimePicker dtpStartTime = new DateTimePicker();
dtpStartTime.ShowUpDown = true;
dtpStartTime.Format = DateTimePickerFormat.Custom;
dtpStartTime.CustomFormat = "HH:mm:ss";

// would like to time to be within a specified range
// e.g. 09:30:00 to 16:00:00
DateTimePicker dtpEndTime = new DateTimePicker();
dtpEndTime.ShowUpDown = true;
dtpEndTime.Format = DateTimePickerFormat.Custom;
dtpEndTime.CustomFormat = "HH:mm:ss";