Gets or sets a value indicating whether the spin box (also known as an up-down control) should display the value it contains in hexadecimal format.
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When the NumericUpDown.Hexadecimal property is set, the NumericUpDown.UpdateEditText method is called to update the spin box's display to the new format.
When the NumericUpDown.Hexadecimal property is set to true, the NumericUpDown.Maximum property should be set to int.MaxValue and the NumericUpDown.Minimum property should be set to int.MinValue.