'Declaration
 
Public Overloads Function Add( _
   ByVal interval As TdIntervalDayToSecond _
) As TdPeriodTime

'Usage
 
Dim instance As TdPeriodTime
Dim interval As TdIntervalDayToSecond
Dim value As TdPeriodTime
 
value = instance.Add(interval)

public TdPeriodTime Add( 
   TdIntervalDayToSecond interval
)

public:
TdPeriodTime Add( 
   TdIntervalDayToSecond interval
) 

Parameters

interval

The TdIntervalDayToSecond that will be added to the period.

Return Value

If this instance of TdPeriodTime or the interval is Null a TdPeriodTime.Null will be returned.

When this operation is performed, the day component of the interval is ignored. Only the hour, minute, and second components are used in this operation. For example, if the period is "01:00:00, 01:30:00" and the interval is "1 02:00:00.00" (1 day, 2 hours) the add operation will result in a period of (03:00:00, 03:30:00).

When adding an interval to a TdPeriodTime it is possible that the ending bound will roll into the next 24 hours, or the beginning bound will roll into the previous 24 hours. For example, suppose the period is

   (19:32:32.3404, 22:00:00.3232)

Adding the interval of "0 03:00:00" (3 hours) to the period will cause the ending bound to roll into the next 24 hours which will result in the invalid period:

    (22:32:32.3404, 01:00:00.3232)

Adding the interval of "-0 20:00:00" (-20 hours) to the same period will cause the beginning period to roll back into the previous 24 hours which results in the invalid period:

    (23:32:32.3404, 02:00:00.3232)

Reference

TdPeriodTime Structure
TdPeriodTime Members
Overload List