Description: Builds the first calendar day of the specified month.
Calling convention: CIP_EncodeMonthStart(Year: Integer, Month: Integer): DateTimeFormat
Parameters:
Year: calendar year.
Month: month number accepted by EncodeDate, normally 1 through 12.
Returns: Delphi date/time value for the first day of the month, or NULL when either argument is NULL.
Availability: Default.
Example:
MonthStart := CIP_EncodeMonthStart(2026, 8);