Set Value FormDateControl

[FormControlEventHandler(formControlStr(AssetProposalDepreciation, ToDateControl), FormControlEventType::Modified)]
    public static void ToDateControl_OnModified(FormControl sender, FormControlEventArgs e)
    {
        str strToDate = sender.valueStr();
        date dateToDate = str2Date(strToDate, 0);
        date dateEndMonth = endMth(dateToDate);
        sender.valueStr(date2str(dateEndMonth, 123, DateDay::Digits1or2, DateSeparator::Slash,DateMonth::Digits2,DateSeparator::Slash,DateYear::Digits4));
    }