DateTime :: hour - Get hours from time value
The function returns the number of hours from the time value, i.e. iHours from the iHours:iMinutes:iSeconds,iCentiseconds time value.
Return value:  Hour ( int32  )
Hour of the day.
Implementation overview
-  - internal feature (not documented)
 DateTime :: hour (  )
-  - internal feature (not documented)
 DateTime :: hour ( iHour )

