Hi Idb,
1) Forms scrollbars cannot be "rotated", but can be drawn either vertically (vertical scrolling) or horizontally (horizontal scrolling). The scrollbar will switch from vertical to horizontal (or vice-versa) when you size it to be longer than it is high.
2) You can effectively change the default increment by simply multiplying the value. Of course the Value varies from 0 to 32767 in steps of 1. But for example if you want it to go from 0 to 100 in steps of 1 simply divide the Value by 327 using integer divide ("" instead of "/").