Parameters Passing to Forms

The call for Form open is known:

callOpenFormTop("ptEdit","FNAME.FM","WORK.TNAME",1,"?=TNAME")

 
In cases where we want to pass two more parameters, the code is as follows:

callOpenFormTop("ptEdit","FNAME.FM","WORK.TNAME",1,"?=TNAME",par1,par2)

Into the code of the called Form, the parameters are taken as:

proc Form_Start()

    parameter1 = __params[6]  {...par1}
    parameter2 = __params[7]  {...par1}

end

It is obvious that parameter counting starts from "ptEdit" as (1).