passing variables to run after macro

[TheVig]

When making an exe, how do you pass variables?

For example, sending the string value "Test" to RunAfter function:

on_after RunAfter "Test"

Also while on the subject, is there anyway to format the BEGIN/END PROJECT so variables could be inserted?
Kind of like how the dialog as a variable works.
----
str Test="Information to be sent to RunAfter function"
str PROJECT=
F
BEGIN PROJECT
main_function Function1
exe_file $my qm$\Function1.exe
icon <default>
manifest $qm$\default.exe.manifest
res
on_before
on_after RunAfter {Test}
...