UniBasic Commands Reference - Rocket Software

Parameter Description
Examples
In the following example, the program segment lists all the items in the VOC file and
returns the result in select list 2:
1-468 UniBasic Commands Reference
RTNLIST int.expr The RTNLIST clause must evaluate to an integer 0–9, designating the
list to return to the calling program. You can use the resulting list with
subsequent READNEXT statements or in the PASSLIST clause of a
MDPERFORM statement. If you do not include an expression after
RTNLIST, the generated list replaces the contents of list 0. If you do not
specify RTNLIST, the MDPERFORM command does not return a list.
PASSLIST
int.expr
The PASSLIST clause must evaluate to an integer 0, 1, or 2,
designating the select list to be sent to the called program. If you do not
specify int.expr, UniData assumes list 0.
The passed list can be the result of previous SELECT or GETLIST
commands, or the RTNLIST clause of an MDPERFORM statement.
PASSCOM This parameter is provided for backward compatibility for releases
before 3.1.
MDPERFORM Parameters (continued)
list_var = 2
MDPERFORM "list dict VOC all" RTNLIST list_var
In the next example, the program segment performs a selection on the CUSTOMER
file, passes the result back in select list 1, and then sorts the result:
list_var = 1
cmd1 = "select CUSTOMER with @ID = '200'"
cmd2 = "sort CUSTOMER by DATE_OUT"
MDPERFORM cmd1 RTNLIST list_var
MDPERFORM cmd2 PASSLIST list_var