MilliSecondOfTheMonth returns the number of milliseconds between the TDateTime value entered as AValue, and 12:00 A.M. of the first day of the month that is specified by AValue.

This may be a very large number.

Declaration: Function MilliSecondOfTheMonth(const AValue: TDateTime): Cardinal;

A simple example follows.

procedure ScriptEvent (var Value : variant);
var
TheSec : cardinal;
begin
//If YESTERDAY is 29-11-2023, the result is 2419200000
TheSec := MilliSecondOfTheMonth(Yesterday);
LogInfo('The number of milliseconds since 1st Nov 23 is '+IntToStr(TheSec));
end;