Thanks !
That's fine.
I made a mistake : working with a virtual machine and Laz 2.2.4 which is ok, and with the host and Laz 2.0.12, which is broken...
Time to update, I think.
Thanks again, I'll add "solved" to the title.
But there is a problem with the color and the SizeGrip :
I set ParentColor False
I change the color of the form, say clSkyBlue and the StatusBar becomes skyblue, see image.
The black line on top of StatusBar stops when entering the SizeGrip.