date reminder from database ?

Question

Hello there I have a Winform whit a birth date field that I enter I want to get Pup up Form Whit a 1 week reminder off all my birth date of all my customers & I want an also 3 day remind & at the same date Exsmpale : if i enter that Tomi birthdate is in 15/08/1974 i want pupup that remind me in 10/08/2004 in 13/08/2004 in 15/08/2004 how can I do it ? if u have code exsample its will help I am working whit a Accses Database & C# thanks allot to all... please help...