From Xojo Documentation
New in 2010r4
A control that is a horizontal button made up of multiple, independent segments.
The easiest way to configure a SegmentedControl is to use the Segments Editor in the IDE. With it, you can create, delete, or reorder segments, label them, add an icon, and choose the selected segment or segments. (If the SelectionType is Multiple, you can have more than one selected segment.)
You set the behavior of the control with the SelectionType property. It enables you to choose whether the set of segments behaves as a group of radio buttons, a group of checkboxes, or a group of pushbutton. If it behaves like a group of checkboxes (Multiple), more than one can be selected at the same time. If it behaves like a pushbutton (None), then it is "selected" only while the mouse is held down.
If you want to do this work using code, you can address each segment with the SegmentedControlItem class. You instantiate an instance of this class for the segment that you want to address.
Resizing a Segmented Control
The individual segments do not automatically resize when the width of the SegmentedControl changes. You'll need to individually change the widths of each segment to to fit the width of the control. This code (in the Resized event handler of a Window) resizes the segments to fit the new width of the SegmentedControl:
Dim w As Integer = SegmentedControl1.Width
Const kPadding = 2
Dim sw As Integer = (w / (cnt)) - kPadding
For i As Integer = cnt - 1 DownTo 0
// get the reference to the segment
Dim s As SegmentedControlItem = SegmentedControl1.Items(i)
s.Width = sw
If you have placed an instance on a window, called SegmentedControl1, you can set or get the properties of any one segment with code like the following
s = SegmentedControl1.Items(0)
If s.Selected Then
// more code
When a segment is selected the Action event runs and is passed the index of the segment that was pressed:
// code for when segment 0 is selected
// code for when segment 1 is selected