You can use next properties:
Direct property - this is direction in which text will be scrolled (diLeftToRight, diRightToLeft, diTopToBottom, diBottomToTop);
StyleLabel property - 3D-style which is used for text displaying (slNormal, slLowered, slRaised);
Layout property - you can change horizontal layout (tlTop, tlCenter, tlBottom);
Speed property - speed for scrolling
NumRepeat property - number for repeat
Continuous property - if you want to scroll a text continuously.

Scrolling will be started when you'll set Active := True.