-dbc not shipped-i make tables dbf free for test
-keyboard.jpg (converted from bmp shipped)
- _mpartno.lostfocus....relock() ??? unknown function (error)-i make a messagebox (to correct)
- in destroy add mandatory : clea events
-add config.fpw screen=off
resource=off
(include in proj or exclude no importance.its searched first and read by vfp)

-main.prg not shipped .it can be simply

on shutdown quit
do form stockent.scx
read events

i adpated your form to my screen (resol 1024x768) (moved the close button to left)

conclusion: i dont see flashing form.try it yourself with unknown.exe in the attached zip !