This enumeration is used to support different measurement units,
which are used for setting various properties in controls, including
WebControl.Height,
WebControl.Width, and Unit.
A Point is a unit of measurement that represents
1/72 of an inch. A Pica is equivalent to 12
points. The Percentage value is relative to the
parent element. An Em is relative to the height of
a parent element's font (so 2 em
specifies a font size that is twice as large as that of the parent).
An Ex is relative to the height of the lowercase
letter "x" of the parent
element's font.
public enum UnitType {
Pixel = 1,
Point = 2,
Pica = 3,
Inch = 4,
Mm = 5,
Cm = 6,
Percentage = 7,
Em = 8,
Ex = 9
}
System.ValueType 
