here my house-maded to create a "dimmed" effect on your forms...
it is not advisable to do this without an adult around .... 😂
Form Second -> where the effect will be showed
in fact, you dont need the any TImage or anyother component here
just use a COLOR like "clGray" in your Form3.Color you see?
NOTE: of course, you can use MSWindows API for this effect... but I dont have time for test now... sorry!!!