The Parameters tab of the Procedure property sheet has the following components:
Parameters list Displays the name, data type, parameter type, and mode of the procedure's parameters. The mode has one of the following values:
IN The parameter is an expression that provides a value to the procedure.
OUT The parameter is a variable that could be given a value by the procedure.
INOUT The parameter is a variable that provides a value to the procedure, and could be given a new value by the procedure.