'Declaration Public Property FillValueMode As SliderTrackFillValueMode
public SliderTrackFillValueMode FillValueMode {get; set;}
If that property is set to Range and SecondaryValue is enabled and SliderValueLabel.Format does not contain "{0}" and the Location of ValueLabel is not float, then the "{0}:{1}" is used for SliderValueLabel.Format. It means that both values are displayed on a single label.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2