# Substitution Variables Functions

These functions create, retrieve and delete substitution variables and return information about them.

Function | Description
EssCreateVariable() | This function creates a new substitution variable or modifies an existing substitution variable if the variable name already exists with the identical server, application, and database values.
EssDeleteVariable() | This function deletes a substitution variable.
EssGetVariable() | This function retrieves the value of a substitution variable.
EssListVariable() | This function lists all substitution variables that conform to the input criteria.