mysql connect link variable

Hi, i want to use in my grid and form applications the php function mysqli_query instread of the scriptcase’s function sc_lookup.
To work this php function need a parameter for the connection link to database.
My question is: exist a variable that scriptcase can pass for doing this?

example: mysqli_query([sc_my_conn],“SELECT * FROM my_table”);

where [sc_my_conn] is the variable that i need

i saw in documentation some variable like: sc_glo_servidor, sc_glo_banco etc… but no one that contains db link connections

​thank you so much for the help and sorry for my english