how to pass parameter to database stored proc

I want to execute an Oracle Stored Proc from JAL.
I want to pass the IN paramater as a variable (not hard-coded)

is this possible using DatabaseExecute ?
ie. Could I create a string that hold the command :

eg Create a JAL script that has a paramater p_proc_param

Dim (l_db_proc_string, string)

set (l_db_proc_string, "begin p_my_proc(")
concat (l_db_proc_string, p_proc_param, l_db_proc_string)
concat (l_db_proc_string, "); End;", l_db_proc_string)
DatabaseExecute(l_db_proc_string, result);

Would this work ?

I should have tried it to start with - yes it works !