Oh, I see, thanks guys.
I have just one question: on frame I have color selector. How can I assign choosed color in "real time" to any color property on main form (selecting color from image by mouse down and moving cursor)? When I want to modify object it's simple, because I can do it by pointer, but how about simple types?
I added var FColor: PColor. When picking color C := SelectedColor and then FColor := @C. Don't changing.