ScreenTapShot - simple screenshot application which transforming to overlay button when launched. You can drag button to any position and make screenshots by clicking. Double click exiting application.

Thanks tortoisedoc for MOUSE_REGION trick

Openrepos: https://openrepos.net/content/coderus/screentapshot
Github: https://github.com/CODeRUS/harbour-screentapshot

Donations for further development: