Returns the number of DLC pieces for the current running app.
dlc_app_id
Integer: The APPID of a DLC.
Checks if the user owns the DLC and if the DLC is installed.
dlc_app_id
Integer: The APPID of a DLC.
Install a specific DLC.
dlc_app_id
Integer: The APPID of a DLC.
Uninstall a specific DLC.