MobileSegmentedButton.RemoveSegment
From Xojo Documentation
Method
Removes the segment passed.
Sample Code
Removes a specific segment:
// MoonSegment is a property of type MobileSegment that
// was previously added to the MobileSegmentedButton control.
SegmentedButton1.RemoveSegment(MoonSegment)
// was previously added to the MobileSegmentedButton control.
SegmentedButton1.RemoveSegment(MoonSegment)