Date Insertion problem

Hello frnds;
                I am selecting the date field in the 'dd-mm-yyyy' format by using SQL Codes(103,105...).While inserting I want the userto insert the date in same format(dd-mm-yyyy) but it will not happening as in SQL Server we need to insert the date in'mm-dd-yyyy' format.Pls send me insertion query in sql to achieve this.Pls respond me ASAP.

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