Converts a string to a TDateTime value, with error default.
Call StrToDateDef to parse a string that specifies a date. If S does not contain a valid date, StrToDateDef returns Default.
S must consist of two or three numbers, separated by the character defined by the DateSeparator global variable or its TFormatSettings equivalent. The order for month, day, and year is determined by the ShortDateFormat global variable or its TFormatSettings equivalent--possible combinations are m/d/y, d/m/y, and y/m/d.
If S contains only two numbers, it is interpreted as a date (m/d or d/m) in the current year.
Year values between 0 and 99 are converted using the TwoDigitYearCenturyWindow. This value is stored either in a global variable (first form) or as a field in the FormatSettings parameter (second form) See "Currency and Date-Time Formatting Variables" for more information.
The first form of StrToDateDef is not thread-safe, because it uses localization information contained in global variables. The second form of StrToDateDef, which is thread-safe, refers to localization information contained in the FormatSettings parameter. Before calling the thread-safe form of StrToDateDef, you must populate FormatSettings with localization information. To populate FormatSettings with a set of default locale values, call GetLocaleFormatSettings.
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