F12 adapls can only be used with Adlib for DOS (under Windows, the same functionality is achieved in a different way). These adapls are executed when the user presses F12. There are three types of F12 adapls: one executed in display mode, one executed in edit mode, and one executed from a link screen.

•Display mode: the adapl named f12adapl.bin.
•Edit mode: the adapl named linkproc.bin.
•Link screen: the adapl you enter under command procedure.

The F12 ADAPLs can be used for all kinds of purposes. The most common application has proved to be starting up WordPerfect in Adlib, so that a WP document can be viewed in Adlib. An example:

text command[80]
if (bn <> '') {
/* in bn a unique file name is saved
/* e.g. doc1.wpd
command = 'dowp c:\wp51\' + bn
/* dowp is a batchfile that starts wp and then
/* opens the file in bn that is located in C:\wp51\
system (command)
attr(blue on white)
cls
}
end

The corresponding batchfile dowp.bat looks like this:

@echo off
echo 'Please wait.'
MODE CO80
if exists %1 C:\wp51\wp %1

This is but one example. The possibilities are legion.