Mega Code Archive

Incsecond - increments a tdatetime variable by + or - number of seconds dateutils unit

function IncSecond ( const StartDateTime : TDateTime {; NumberOfSeconds : Integer = 1} ) : TDateTime; Description The IncSecond function returns a TDateTime value that is NumberOfSeconds greater than the passed StartDateTime value. The year, month, day and hour values are incremented as appropriate. The increment value is optional, being 1 by default. Notes There is no DecSecond function. Instead, use IncSecond with a negative increment. Related commands IncYear Increments a TDateTime variable by a number of years IncMonth Increments a TDateTime variable by a number of months IncDay Increments a TDateTime variable by + or - number of days IncMinute Increments a TDateTime variable by + or - number of minutes IncMillisecond Increments a TDateTime variable by + or - number of milliseconds Example code : A simple example of increment and decrement var myDate : TDateTime; begin // Set up our date just before the end of the year 2005 myDate := EncodeDateTime(2005, 12, 31, 23, 59, 0, 0); ShowMessage('myDate = '+DateTimeToStr(myDate)); // Add 60 seconds to this date myDate := IncSecond(myDate, 60); ShowMessage('myDate + 100 seconds = '+DateTimeToStr(myDate)); // Subtract 120 seconds from this date myDate := IncSecond(myDate, -120); ShowMessage('myDate - 120 seconds = '+DateTimeToStr(myDate)); end; Show full unit code myDate = 31/12/2005 23:59:00 myDate = 01/01/2006 myDate = 31/12/2005 23:58:00