DoubleSlider is a .Net control which has a slider with two thumbs. It can be in any Windows .Net applications.
ValueLowChanged and ValueHighChanged events can be triggered respectively when the ValueLow and ValueHigh values change. MouseReleased event can be triggered when you release the left mouse button after dragging the thumbs.
To plug in the DoubleSlider control, simply add DoubleSlider control to the Toolbox of the Microsoft Visual Studio .Net IDE, then you will be able to drag the control to your Windows Forms. For details on how to add controls to the Toolbox, please click here.