You could do it this way:

do main

a) main program

** some settings here

do form password
read events

b) Form password should call the first form, after a valid password was entered

In the queryunload method put this code

thisform.release
do form firstform

c) In the called form, in this example firstform, do your business and when it closes, put the following code in the queryunload method

release thisform
clear events

This will bring you back to the command window