|Project Developer Reference|
Returns or sets the abbreviation for "hour" that is displayed for values such as durations, delays, slack, and work. Read/write Integer.
expression A variable that represents a Project object.
The hour label display corresponds to the Hours list, which is found on the Edit tab of the Options dialog box (Tools menu). For example, setting the HourLabelDisplay property to 0 sets the Hours list to the first value in the list.