callback functions add a substantial amount of code to your
application. This code is provided for you in the Lesson6 directory.
To add the
reactor callback functions to your program
Copy the gpreact.lsp file from the
Tutorial\VisualLISP\Lesson6 directory to your
MyPath working directory.
Open the GPath project (if it is not
already open), and choose the Project Properties button in the
gpath project window.
Add the gpreact.lsp file to your
The gpreact.lsp file can reside anywhere
in the order of files between utils.lsp,
which must remain first, and gpmain.lsp,
which should remain as the last file. Move any files, if necessary,
then choose OK.
Open the gpreact.lsp file by
double-clicking on the file name within the gpath project
the comments in the file to help you understand what it is doing.
Note that all the callback functions are stubbed out; the only
functionality they perform is to display alert messages when they
function in the file is so important it deserves a heading of its