Hello,
as far as I know, the standard Windows scrollbars do not have owner-draw functionality in Windows API to only remove the arrows.
If you don't want the scroll bar in your input box, do not enable scrolling.
Maybe, you can use this class and change the pictures of up and down arrows to empty pictures: Custom-Scrollbar-Library-version-1-1
Regards, Guido
Edit: here is another class: Replace-a-Window-s-Internal-Scrollbar-with-a-custo