Use this component: 

When you want users to do this: 

TScrollBar  

Select values on a continuous range  

TTrackBar  

Select values on a continuous range (more visually effective than a scroll bar)  

TUpDown  

Select a value from a spinner attached to an edit component (VCL applications only)  

THotKey  

Enter Ctrl/ Shift/ Alt keyboard sequences (VCL applications only)