Returns a date from a form variable by trying to convert the string date input to a date time value. Supports ISO date conversion for native
type="datetime-local" inputs as well as default locale parsing using
Date or if date is empty or can't be converted. Null if lcFormKey is not found and llNullIfNotFound is .t.
The form variable from which to read the date input.
If not lcFormKey is not found null is returned
See also:Class wwrequest
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