# VPP functions

> SDK functions for Apple's Volume Purchase Program - retrieve programs, users, and licenses, and send VPP enrollment invitations to devices.

Source: https://docs.capaone.com/capainstaller/sdk-capainstaller-software-development-kit-functions/vpp-functions/  
Product: CapaInstaller — a separate CapaSystems product; do not apply this page to any other.

VPP functions let you retrieve users, licenses, and programs in Apple's Volume Purchase Program from a script. You can also send VPP invitations to devices to enroll their users in the program.

## In this section

- [Get vpp programs](/capainstaller/sdk-capainstaller-software-development-kit-functions/vpp-functions/get-vpp-programs/) - Get VPP Programs.
- [Get vpp users](/capainstaller/sdk-capainstaller-software-development-kit-functions/vpp-functions/get-vpp-users/) - Get VPP Users in a specified program.
- [Get vpp users all](/capainstaller/sdk-capainstaller-software-development-kit-functions/vpp-functions/get-vpp-users-all/) - Get all VPP Users.
- [Invite unit to vpp](/capainstaller/sdk-capainstaller-software-development-kit-functions/vpp-functions/invite-unit-to-vpp/) - Send an invite to a unit.