Help Required To show the 16 date of previous month

Question

  Hello To Everyone

I m new in VB . I have start a project of overtime for a company . The company pay the overtime from date 16 to the date 15 of next month.I have put two boxes on visual basic form naming with Label Starting Date and Ending Date.
Now i want that the first box show automatically the starting date 16 of a month to ending date 15 of a next month.

Please let me know about the code by any experience person in detail .

Thanks