Hi Sergey,

> I see than in Form Designer with Margin 0 or 1 but not when form is run. Is it what you see?

Yes, the bug is for Margin < 2 and for all .ScrollBars values,
it write left border of the .ScrollBar also.

For a good vision, set Form BackColor to RED, EditBox BackColor to GREEN.

* At Design
.Margin
   <2
* BackColor overwrite Right zone by MAX(2-.Margin,0) vertical lines.


* At Runtime ( AT Design conditions, plus other conditions )
* For simple EditBox on a Form the bug is not present at runtime.
* For Sub-Sub -( ?times ) - Class EditBox on a Sub-Sub -( ?times ) - Class Form
* and with the form object created with NEWOBJECT() i see the bug, but i do not want to search the minimal case.

Fabio