>I need to specify label definition (data, label type, layout...) like that works in label wizard, except all will be done by user. How can I do that using code? Thank you in advance!

In later versions of VFP [VFP7 and up], you can distribute the wzReport.app with your app. For VFP6, look for the redist.txt file in the VFP home folder to see if you can distribute with that version. If so, I call this wizard with the following command:

do wzReport with '', 'LABEL'