Sorry, this is currently unfortunately not customizable.
But i think in general every grid must be provided with a customizable scroll bar. My suggestion is to put a new property that show optionally a embedded scroll bars (not these of default windows !)
We'll consider this.
How to hide completely scroll bars ? On metro style if i set ScrollBars = ssNone, at run time i see always a thin bar
If you do not want any scrollbar, set grid.ScrollBars = ssNone and ScrollType = ssNormal
already done ... but i ve always the bar . i set scrollwidth = 0 too .. nothing !
Default grid on the form and the code: