>I define my form with new dimensions. After that I define (try to) say horizontal scrollable.
>
>After that I try to modify the size of what can be seen when I launch my app.
>
>I cannot grab the side of the form and modify the viewable part of the form so that the scrollbar will appear. I tried with another form and I have the same problem.
>
>Now I'm wondering if there would be a property blocking me.
>
>By the way I did this without in another form.


Check ScrollBars property of that Form. If it is equal to 0 (zero) no scrolls will be shown.