Open With Command

How do i have my program set a file to open with my program.
I have my program to open if i right click it and use open with and i select my program it will open the file but now i want to be able to set the file in windows to auto open with my program. Kinda like media player opens .mp3 i want my program to do the same.

When you build the install package:

ms-help://MS.VSCC/MS.MSDNVS/vsintro7/html/vbtskCreatingInstallerForYourApplication.htm

scroll down to "To create file associations for the Windows application"

thanks
alot